SwePub
Sök i SwePub databas

  Extended search

Träfflista för sökning "WFRF:(Karlsson Roland) "

Search: WFRF:(Karlsson Roland)

  • Result 1-50 of 189
Sort/group result
   
EnumerationReferenceCoverFind
1.
  •  
2.
  •  
3.
  •  
4.
  • Akselsson, Roland, et al. (author)
  • Fysikaliska faktorer
  • 1994
  • In: Arbete Människa Teknik. - 9175224143 ; , s. 45-113
  • Book chapter (other academic/artistic)
  •  
5.
  • Akselsson, Roland, et al. (author)
  • Fysikaliska faktorer
  • 2005
  • In: Arbete Människa Teknik. - 9175228955 ; , s. 45-113
  • Book chapter (other academic/artistic)
  •  
6.
  • Akselsson, Roland, et al. (author)
  • Safety and Risk
  • 2009
  • In: Work and technology on human terms. - 9789173650588 ; , s. 425-461
  • Book chapter (other academic/artistic)
  •  
7.
  • Akselsson, Roland, et al. (author)
  • Säkerhet och risk
  • 2008
  • In: Arbete och teknik på människans villkor. - 9789173650373 ; , s. 425-461
  • Book chapter (other academic/artistic)
  •  
8.
  • Aktas, A, et al. (author)
  • A direct search for stable magnetic monopoles produced in positron-proton collisions at HERA
  • 2005
  • In: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 41, s. 133-141
  • Journal article (peer-reviewed)abstract
    • A direct search has been made for magnetic monopoles produced in e(+)p collisions at a centre of mass energy of 300 GeV at HERA. The beam pipe surrounding the interaction region in 1995-1997 was investigated using a SQUID magnetometer to look for stopped magnetic monopoles. During this time an integrated luminosity of 62 pb(-1) was delivered. No magnetic monopoles were observed and charge and mass dependent upper limits on the e(+)p production cross section are set.
  •  
9.
  • Aktas, A, et al. (author)
  • A general search for new phenomena in ep scattering at HERA
  • 2004
  • In: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - 0370-2693. ; 602:1-2, s. 14-30
  • Journal article (peer-reviewed)abstract
    • A model-independent search for deviations from the Standard Model prediction is performed in e(+) p and e(-) p collisions at HERA using H1 data corresponding to an integrated luminosity of 117 pb(-1). For the first time all event topologies involving isolated electrons, photons, muons, neutrinos and jets with high transverse momenta are investigated in a single analysis. Events are assigned to exclusive classes according to their final state. A statistical algorithm is developed to search for deviations from the Standard Model in the distributions of the scalar sum of transverse momenta or invariant mass of final state particles and to quantify their significance. A good agreement with the Standard Model prediction is observed in most of the event classes. The most significant deviation is found for a topology containing an isolated muon, missing transverse momentum and a jet, consistent with a previously reported observation.
  •  
10.
  • Aktas, A, et al. (author)
  • Evidence for a narrow anti-charmed baryon state
  • 2004
  • In: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693. ; 588:1-2, s. 17-28
  • Journal article (peer-reviewed)abstract
    • A narrow resonance in D*(-)p and D*(+)(p) over bar invariant mass combinations is observed in inelastic electron-proton collisions at centre-of-mass energies of 300 GeV and 320 GeV at HERA. The resonance has a mass of 3099 +/- 3(stat.) +/- 5(syst.) MeV and a measured Gaussian width of 12 +/- 3(stat.) MeV, compatible with the experimental resolution. The resonance is interpreted as an anti-charmed baryon with a minimal constituent quark composition of uudd (c) over bar, together with the charge conjugate. (C) 2004 Elsevier B.V. All rights reserved.
  •  
11.
  • Aktas, A, et al. (author)
  • Inclusive production of D+, D-0, D-s(+) and D*(+) mesons in deep inelastic scattering at HERA
  • 2005
  • In: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 38:4, s. 447-459
  • Journal article (peer-reviewed)abstract
    • Inclusive production cross sections are measured in deep inelastic scattering at HERA for meson states composed of a charm quark and a light antiquark or the charge conjugate. The measurements cover the kinematic region of photon virtuality 2 < Q(2) < 100 GeV2, inelasticity 0.05 < y < 0.7, D meson transverse momenta p(t)( D) greater than or equal to 2.5 GeV and pseudorapidity |eta( D)| less than or equal to 1.5. The identification of the D-meson decays and the reduction of the combinatorial background profit from the reconstruction of displaced secondary vertices by means of the H1 silicon vertex detector. The production of charmed mesons containing the light quarks u, d and s is found to be compatible with a description in which the hard scattering is followed by a factorisable and universal hadronisation process.
  •  
12.
  • Aktas, A, et al. (author)
  • Measurement of anti-deuteron photoproduction and a search for heavy stable charged particles at HERA
  • 2004
  • In: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 36:4, s. 413-423
  • Journal article (peer-reviewed)abstract
    • The cross section for anti-deuteron photoproduction is measured at HERA at a mean centre-of-mass energy of W-gammap=200 GeV in the range 0.2 < p(T)/M < 0.7 and y < 0.4, where M, p(T) and y are the mass, transverse momentum and rapidity of the anti-deuteron in the HERA laboratory frame, respectively. The numbers of anti-deuterons per event are found to be similar in photoproduction to those in central proton-proton collisions at the CERN ISR but much lower than those in central Au-Au collisions at RHIC. The coalescence parameter B-2, which characterizes the likelihood of anti-deuteron production, is measured in photoproduction to be 0.010+/-0.002+/-0.001, which is much higher than in Au-Au collisions at a similar nucleon-nucleon centre-of-mass energy. No significant production of particles heavier than deuterons is observed and upper limits are set on the photoproduction cross sections for such particles.
  •  
13.
  • Aktas, A, et al. (author)
  • Measurement of beauty production at HERA using events with muons and jets
  • 2005
  • In: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 41:4, s. 453-467
  • Journal article (peer-reviewed)abstract
    • A measurement of the beauty production cross section in ep collisions at a centre-of-mass energy of 319 GeV is presented. The data were collected with the H1 detector at the HERA collider in the years 1999-2000. Events are selected by requiring the presence of jets and muons in the final state. Both the long lifetime and the large mass of b-flavoured hadrons are exploited to identify events containing beauty quarks. Differential cross sections are measured in photoproduction, with photon virtualities Q(2) < 1 GeV2, and in deep inelastic scattering, where 2 < Q(2) < 100 GeV2. The results are compared with perturbative QCD calculations to leading and next-to-leading order. The predictions are found to be somewhat lower than the data.
  •  
14.
  • Aktas, A, et al. (author)
  • Measurement of charm and beauty photoproduction at HERA using D*mu correlations
  • 2005
  • In: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693. ; 621:1-2, s. 56-71
  • Journal article (peer-reviewed)abstract
    • A measurement of charm and beauty photoproduction at the electron proton collider HERA is presented based on the simultaneous detection of a D*(+/-) meson and a muon. The correlation between the D* meson and the muon serves to separate the charm and beauty contributions and the analysis provides comparable sensitivity to both. The total and differential experimental cross sections are compared to LO and NLO QCD calculations. The measured charm cross section is in good agreement with QCD predictions including higher order effects while the beauty cross section is higher.
  •  
15.
  • Aktas, A, et al. (author)
  • Measurement of dijet cross sections in ep interactions with a leading neutron at HERA
  • 2005
  • In: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 41:3, s. 273-286
  • Journal article (peer-reviewed)abstract
    • Measurements are reported of the production of dijet events with a leading neutron in ep interactions at HERA. Differential cross sections for photoproduction and deep inelastic scattering are presented as a function of several kinematic variables. Leading order QCD simulation programs are compared with the measurements. Models in which the real or virtual photon interacts with a parton of an exchanged pion are able to describe the data. Next-to-leading order perturbative QCD calculations based on pion exchange are found to be in good agreement with the measured cross sections. The fraction of leading neutron dijet events with respect to all dijet events is also determined. The dijet events with a leading neutron have a lower fraction of resolved photon processes than do the inclusive dijet data.
  •  
16.
  • Aktas, A, et al. (author)
  • Measurement of F-2(c(c)over-bar) and F-2(b(b)over-bar) at high Q(2) using the H1 vertex detector at HERA
  • 2005
  • In: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 40:3, s. 349-359
  • Journal article (peer-reviewed)abstract
    • Measurements are presented of inclusive charm and beauty cross sections in e(+)p collisions at HERA for values of photon virtuality Q(2) > 150 GeV2 and of inelasticity 0.1 < y < 0.7. The charm and beauty fractions are determined using a method based on the impact parameter, in the transverse plane, of tracks to the primary vertex, as measured by the H1 vertex detector. The data are divided into four regions in Q(2) and Bjorken x, and values for the structure functions F-2(c (c) over bar) and F-2(b (b) over bar) are obtained. The results are found to be compatible with the predictions of perturbative quantum chromodynamics.
  •  
17.
  • Aktas, A, et al. (author)
  • Measurement of prompt photon cross sections in photoproduction at HERA
  • 2005
  • In: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 38:4, s. 437-445
  • Journal article (peer-reviewed)abstract
    • Results are presented on the photoproduction of isolated prompt photons, inclusively and associated with jets, in the gammap center of mass energy range 142 < W < 266 GeV. The cross sections are measured for the transverse momentum range of the photons 5 < E. T < 10 GeV and for associated jets with E-T(jet) > 4.5 GeV. They are measured differentially as a function of E-T(gamma), E-T(jet), the pseudorapidities eta(gamma) and eta(jet) and estimators of the momentum fractions x(gamma) and x(p) of the incident photon and proton carried by the constituents participating in the hard process. In order to further investigate the underlying dynamics, the angular correlation between the prompt photon and the jet in the transverse plane is studied. Predictions by perturbative QCD calculations in next to leading order are about 30% below the inclusive prompt photon data after corrections for hadronisation and multiple interactions, but are in reasonable agreement with the results for prompt photons associated with jets. Comparisons with the predictions of the event generators PYTHIA and HERWIG are also presented.
  •  
18.
  • Aktas, A, et al. (author)
  • Measurement of the proton structure function F-2 at low Q(2) in QED Compton scattering at HERA
  • 2004
  • In: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693. ; 598:3-4, s. 159-171
  • Journal article (peer-reviewed)abstract
    • The proton structure function F-2(x, Q(2)) is measured in inelastic QED Compton scattering using data collected with the H1 detector at HERA. QED Compton events are used to access the kinematic range of very low virtualities of the exchanged photon, Q(2), down to 0.5 GeV2, and Bjorken x up to similar to 0.06, a region which has not been covered previously by inclusive measurements at HERA. The results are in agreement with the measurements from fixed target lepton-nucleon scattering experiments. (C) 2004 Published by Elsevier B.V.
  •  
19.
  • Aktas, A, et al. (author)
  • Search for bosonic stop decays in R-parity violating supersymmetry in e(+)p collisions at HERA
  • 2004
  • In: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693. ; 599:3-4, s. 159-172
  • Journal article (peer-reviewed)abstract
    • A search for scalar top quarks in R-parity violating supersymmetry is performed in e(+)p collisions at HERA using the H1 detector. The data, taken at roots = 319 GeV and 301 GeV, correspond to an integrated luminosity of 106 pb(-1). The resonant production of scalar top quarks t in positron quark fusion via an R-parity violating Yukawa coupling lambda' is considered with the subsequent bosonic stop decay t --> BW. The R-parity violating decay of the sbottom quark b --> dv(e) and leptonic and hadronic W decays are considered. No evidence for stop production is found in the search for bosonic stop decays nor in a search for the direct R-parity violating decay t --> eq. Mass dependent limits on lambda' are obtained in the framework of the minimal supersymmetric Standard Model. Stop quarks with masses up to 275 GeV can be excluded at the 95% confidence level for a Yukawa coupling of electromagnetic strength. (C) 2004 Elsevier B.V. All rights reserved.
  •  
20.
  • Aktas, A, et al. (author)
  • Search for light gravitinos in events with photons and missing transverse momentum at HERA
  • 2005
  • In: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693. ; 616:1-2, s. 31-42
  • Journal article (peer-reviewed)abstract
    • A search for gravitinos produced in e(+/-)p collisions is performed using the H1 detector at HERA. The data were taken at a centre-of-mass energy of 319 GeV and correspond to an integrated luminosity of 64.3 pb(-1) for e(+)p collisions and 13.5 pb(-1) for e(-)p collisions. If R-parity is not conserved, the t-channel exchange of a selectron can produce a neutralino, which, in models where the gravitino is the lightest supersymmetric particle, subsequently decays into a photon and a light gravitino. The resulting event signature, which involves an isolated photon, a jet and missing transverse energy, is analysed for the first time at HERA. No deviation from the Standard Model is found. Exclusion limits on the cross section and on R-parity-violating Yukawa couplings are derived in a Gauge Mediated Supersymmetry Breaking scenario. The results are independent of the squark sector. Neutralinos and supersymmetric partners of the left-handed electron with masses up to 112 GeV and 164 GeV, respectively, can be ruled out at the 95% confidence level for R-parity-violating couplings lambda' equal to 1, in some parts of the parameter space of the considered model.
  •  
21.
  • Aktas, A, et al. (author)
  • Search for squark production in R-parity violating supersymmetry at HERA
  • 2004
  • In: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 36:4, s. 425-440
  • Journal article (peer-reviewed)abstract
    • A search for squarks in R-parity violating supersymmetry is performed in e(+/-)p collisions at HERA using the H1 detector. The data were taken at a centre-of-mass energy of 319 GeV and correspond to an integrated luminosity of 64.3 pb(-1) for e (+) p collisions and 13.5 pb(-1) for e(-)p collisions. The resonant production of squarks via a Yukawa coupling lambda' is considered, taking into account direct and indirect R-parity violating decay modes. No evidence for squark production is found in the multi-lepton and multi-jet final state topologies investigated. Mass dependent limits on lambda' are obtained in the framework of the Minimal Supersymmetric Standard Model. In addition, the results are interpreted in terms of constraints on the parameters of the minimal Supergravity model. At the 95% confidence level squarks of all flavours with masses up to 275 GeV are excluded in a large part of the parameter space for a Yukawa coupling of electromagnetic strength. For a coupling strength 100 times smaller, masses up to 220 GeV can be ruled out.
  •  
22.
  • Ali, Khayri Mohammed, et al. (author)
  • Performance of Muse on Switch-Based Multiprocesor Machines
  • 1992. - 1
  • Reports (other academic/artistic)abstract
    • The Muse (multiple sequential Prolog engines) approach has been used to make a simple and efficient OR-parallel implementation of the full Prolog language. The performance results of the Muse system on bus-based multiprocessor machines have been presented in previous chapters, papers. This chapter paper discusses the implementation and performance results of the Muse system on switch-based multiprocessors (the BBN Butterfly GP1000 and TC2000). The results of Muse execution show that high real speedups can be achieved for Prolog programs that exhibit coarse-grained parallelism. The scheduling overhead is equivalent to around 8 -- 26 Prolog procedure calls per task on the TC2000. The chapter paper also compares the Muse results with corresponding results for the Aurora OR-parallel Prolog system. For a large set of benchmarks, the results are in favor of the Muse system.
  •  
23.
  • Ali, Khayri Mohammed, et al. (author)
  • The Engine-Scheduler Interface used in the Muse OR-parallel Prolog System
  • 1992. - 1
  • Reports (other academic/artistic)abstract
    • Almost any sequential Prolog system is in principle easy to extend for OR-parallelism, using the Muse execution model. To reduce your programming effort we have implemented the Muse scheduler, with a clean interface to the Prolog sequential engine. This interface is implemented as a set of C macros. The sequential Prolog system to be parallelized uses some of those macros provided by the Muse scheduler and must also provide some macros for the Muse scheduler. This chapter paper contains a definition and description of the required macros, emphasizing information needed by the Prolog engine programmer.
  •  
24.
  • Augustsson, Jesper, 1964, et al. (author)
  • Ability of a new hop test to determine functional deficits after anterior cruciate ligament reconstruction
  • 2004
  • In: Knee Surg Sports Traumatol Arthrosc. - : Springer Science and Business Media LLC. - 0942-2056 .- 1433-7347. ; 12:5, s. 350-6
  • Journal article (peer-reviewed)abstract
    • The aim of this study was to investigate the ability of a new hop test to determine functional deficits after anterior cruciate ligament (ACL) reconstruction. The test consists of a pre-exhaustion exercise protocol combined with a single-leg hop. Nineteen male patients with ACL reconstruction (mean time after operation 11 months) who exhibited normal single-leg hop symmetry values (> or =90% compared with the non-involved extremity) were tested for one-repetition maximum (1 RM) strength of a knee-extension exercise. The patients then performed single-leg hops following a standardised pre-exhaustion exercise protocol, which consisted of unilateral weight machine knee-extensions until failure at 50% of 1 RM. Although no patients displayed abnormal hop symmetry when non-fatigued, 68% of the patients showed abnormal hop symmetry for the fatigued test condition. Sixty-three per cent exhibited 1 RM strength scores of below 90% of the non-involved leg. Eighty-four percent of the patients exhibited abnormal symmetry in at least one of the tests. Our findings indicate that patients are not fully rehabilitated 11 months after ACL reconstruction. It is concluded that the pre-exhaustion exercise protocol, combined with the single-leg hop test, improved testing sensitivity when evaluating lower-extremity function after ACL reconstruction. For a more comprehensive evaluation of lower-extremity function after ACL reconstruction, it is therefore suggested that functional testing should be performed both under non-fatigued and fatigued test conditions.
  •  
25.
  • Augustsson, Jesper, 1964, et al. (author)
  • Single-leg hop testing following fatiguing exercise: reliability and biomechanical analysis
  • 2006
  • In: Scand J Med Sci Sports. - : Wiley. - 0905-7188. ; 16:2, s. 111-20
  • Journal article (peer-reviewed)abstract
    • A fatiguing exercise protocol was combined with single-leg hop testing to improve the possibilities of evaluating the effects of training or rehabilitation interventions. In the first test-retest experiment, 11 healthy male subjects performed two trials of single-leg hops under three different test conditions: non-fatigued and following fatiguing exercise, which consisted of unilateral weight machine knee extensions at 80% and 50%, respectively, of 1 repetition maximum (1 RM) strength. Intraclass correlation coefficients ranged from 0.75 to 0.98 for different hop test conditions, indicating that all tests were reliable. For the second experiment, eight healthy male subjects performed the fatiguing exercise protocol to investigate how fatigue influences lower-extremity joint kinematics and kinetics during single-leg hops. Hip, knee and ankle joint angles, moments and powers, as well as ground-reaction forces were recorded with a six-camera, motion-capture system and a force platform. Recovery of hop performance following the fatiguing exercise was also measured. During the take-off for the single-leg hops, hip and knee flexion angles, generated powers for the knee and ankle joints, and ground-reaction forces decreased for the fatigued hop conditions compared with the non-fatigued condition (P<0.05). Compared with landing during the non-fatigued condition, hip moments and ground-reaction forces were lower for the fatigued hop conditions (P<0.05). The negative joint power was two to three times greater for the knee than for the hip and five to 10 times greater for the knee than for the ankle during landing for all test conditions (P<0.05). Most measured variables had recovered three minutes post-exercise. It is concluded that the fatiguing exercise protocol combined with single-leg hop testing was a reliable method for investigating functional performance under fatigued test conditions. Further, subjects utilized an adapted hop strategy, which employed less hip and knee flexion and generated powers for the knee and ankle joints during take-off, and less hip joint moments during landing under fatigued conditions. The large negative power values observed at the knee joint during the landing phase of the single-leg hop, during which the quadriceps muscle activates eccentrically, indicate that not only hop distance but also the ability to perform successful landings should be investigated when assessing dynamic knee function.
  •  
26.
  • Augustsson, Jesper, Docent, 1964-, et al. (author)
  • Styrketräning för idrott, motion och rehabilitering
  • 2019. - 2
  • Book (other academic/artistic)abstract
    • Styrketräning kan utövas som en egen idrott i form av tyngdlyftning och styrkelyft. Styrketräning bedrivs också i prestationshöjande syfte som ett viktigt komplement till andra träningsformer eller idrotter. Många styrketränar för att orka mer och klara vardag och fritid bättre. Sist men inte minst spelar styrketräning en viktig roll i att förebygga och behandla skador och sjukdomar.Styrketräning är inkluderande och kan utformas så att vem som helst, oberoende av ålder och fysisk status kan utföra den. Styrketräning är också skonsam och anpassningsbar och därför alltid ett alternativ när andra träningsformer blivit för krävande och inte längre fungerar att utföra. Styrketräning är dessutom en effektiv och utmanande träningsform, på kort tid kan man pressas till total utmattning.Det är alltså inte så konstigt att styrketräning är en av de vanligaste träningsformerna och idag har mer än två miljoner utövare i Sverige. Och i takt med att intresset för styrketräning ökar, så bidrar forskningen till att kunskapen om kropp och muskler också ökar. Denna bok är den mest heltäckande och ambitiösa om styrketräning som skrivits i Sverige och ger såväl kunskap som vägledning kring hur styrketräning ska bedrivas för att ge optimal effekt utifrån träningens syfte. Boken är indelad i olika kapitel som behandlar många olika aspekter av styrketräning. För att öka förståelsen och för att göra läsningen så stimulerande som möjligt är boken rikt illustrerad och försedd med faktarutor och sammanfattningar.Den nya upplagan av boken har både uppdaterats och utökats med nya forskningsrön, aktuella referenser och information i samtliga kapitel. Den tillämpade delen av boken har ytterligare fördjupats med nya bilder där de mest betydelsefulla styrketräningsövningarna demonstreras på ett unikt och pedagogiskt sätt för läsaren. Kapitlen Styrketräning för unga, gravida och äldre, Förebyggande och rehabiliterande styrketräning och Kostens betydelse vid styrketräning har alla nytt innehåll. Ett helt nytt kapitel, Träningsplanering och tester för styrketräning, har tillkommit.Styrketräning – för idrott, motion och rehabilitering riktar sig bland annat till aktiva och ledare inom idrottsrörelsen, hälso-, friskvårds-, gym- och fitnessbranschens aktörer och till utbildningar av fysioterapeuter, idrottsvetare, hälsovetare, biomedicinare, idrottslärare med flera.
  •  
27.
  • Augustsson Ryman, Sofia, 1975, et al. (author)
  • Performance Enhancement Following a Strength and Injury Prevention Program: A 26-Week Individualized and Supervised Intervention in Adolescent Female Volleyball Players
  • 2011
  • In: INTERNATIONAL JOURNAL OF SPORTS SCIENCE & COACHING. - : SAGE Publications. - 1747-9541 .- 2048-397X. ; 6:3, s. 399-417
  • Journal article (peer-reviewed)abstract
    • Abstract: The aim of this study was to evaluate the effects of a 26-week individualized and supervised strength and injury prevention program on performance enhancement in young female volleyball players who completed resistance training with either a supervised and individualized training program (experimental group, n=10) or an unsupervised non-individualized training program (control group, n=17). Exposure and injury data were collected during the 2006-2007 season (baseline season) and the 26-week program was conducted during the 2007-2008 season (intervention season). All players were tested for physical performance. At post-test, the players in the experimental group had improved significantly more than the players in the control group for squat (p<0.0001), bench press (p=0.048), push-ups (p=0.02) and sit-ups (p<0.0001) but not for the vertical jump test. Thirty-five percent (6/17) of the players from the control group and 80% (8/10) of the players in the experimental group completed the resistance training with compliance of no less than 50%. The present study shows the importance of individualization and supervision for resistance training in young female athletes when it comes to compliance, strength gains and performance.
  •  
28.
  • Beischer, Susanne, et al. (author)
  • Young Athletes Who Return to Sport Before 9 Months After Anterior Cruciate Ligament Reconstruction Have a Rate of New Injury 7 Times That of Those Who Delay Return
  • 2020
  • In: Journal of Orthopaedic & Sports Physical Therapy. - : Journal of Orthopaedic & Sports Physical Therapy (JOSPT). - 0190-6011 .- 1938-1344. ; 50:2, s. 83-90
  • Journal article (peer-reviewed)abstract
    • OBJECTIVE: To investigate the association between sustaining a second anterior cruciate ligament (ACL) injury and (1) time to return to sport, (2) symmetrical muscle function, and (3) symmetrical quadriceps strength at the time of return to sport in young athletes after primary ACL reconstruction. DESIGN: Prospective cohort study. METHODS: Patient demographics and results from 5 tests of muscle function (2 strength tests and 3 hop tests) were extracted from a rehabilitation registry. A questionnaire was sent to athletes (1530 years old) who were involved in knee-strenuous sport before the injury and had undergone primary ACL reconstruction to determine time of return to knee-strenuous sport (preinjury Tegner Activity Scale score of 6 or greater). We used the Cox proportional hazard regression model to analyze time to event. RESULTS: One hundred fifty-nine (32% of initial sample) athletes (mean +/- SD age, 21.5 +/- 4.4 years; 64% female) were included. Athletes with a higher preinjury Tegner Activity Scale score had a higher rate of second ACL injury (hazard ratio = 2.1; 95% confidence interval: 1.2, 3.6; P<.01). Athletes who returned to knee-strenuous sport before 9 months after reconstruction had a higher rate of second ACL injury (hazard ratio = 6.7; 95% confidence interval: 2.6,16.7; P<.001). There was no association between symmetrical muscle function or quadriceps strength and second ACL injury. CONCLUSION: Returning to knee-strenuous sport before 9 months after ACL reconstruction was associated with an approximately 7-fold increased rate of sustaining a second ACL injury. Achieving symmetrical muscle function or quadriceps strength was not associated with new ACL injury in young athletes.
  •  
29.
  • Bohgard, Mats, et al. (author)
  • Fysikaliska faktorer
  • 2008
  • In: Arbete och teknik på människans villkor. - 9789173650373 ; , s. 191-307
  • Book chapter (other academic/artistic)
  •  
30.
  • Bohgard, Mats, et al. (author)
  • Kontinuerliga tvåfraktionsinsamlare för övervakning av partikulära luftföroreningar i arbetsmiljö
  • 1981
  • Reports (other academic/artistic)abstract
    • Rapporten beskriver prototyper av kontinuerliga tvåfraktionsinsamlare för övervakning av partikulära luftföroreningar i arbetsmiljö som har konstruerats. En prototyp är personburen och ger möjligheter till insamling av två partikelstorleksfraktioner i 18 diskreta intervall. PIXE-metoden (analys med partikelinducerad röntgenstrålning) används för multielementanalys av de erhållna proven. Även med mycket korta insamlingstider, ner till 5 minuter, blir detektionsgränserna för de flesta element av yrkeshygieniskt intresse väsentligt lägre än sina respektive hygieniska gränsvärden. Rapporten inkluderar resultat från en enkel fältmätning som utgör ett exempel på de möjligheter den personburna provtagaren ger för yrkeshygieniska mätningar och undersökningar
  •  
31.
  •  
32.
  • Bohgard, Mats, et al. (author)
  • Physical Factors
  • 2009
  • In: Work and Technology on Human Terms. - 9789173650588 ; , s. 191-306
  • Book chapter (other academic/artistic)
  •  
33.
  • Bradley, Andreas, 1983-, et al. (author)
  • Bird-Like Wing Conguration for Pitch Control of a Tailless Aircraft
  • 2012
  • Conference paper (other academic/artistic)abstract
    • A numerical study of a small bird-like aircraft has been performed. The aim of the study was to investigate how a swing wing (actualized through a constant span morphing wing) can be used for pitch control of a tailless aircraft. The results show that a swing wing can be successfully used, and that the aircraft can be maintained in a trimmed state by only small adjustments of part of the wing. A comparison was also made with a Vortex lattice method, but these results significantly deviated from those obtained with CFD. Copyright © 2012 by the American Institute of Aeronautics and Astronautics, Inc.
  •  
34.
  • Bray, Lucy, et al. (author)
  • Developing rights-based standards for children having tests, treatments, examinations and interventions : using a collaborative, multi-phased, multi-method and multi-stakeholder approach to build consensus
  • 2023
  • In: European Journal of Pediatrics. - : Springer Nature. - 0340-6199 .- 1432-1076.
  • Journal article (peer-reviewed)abstract
    • Children continue to experience harm when undergoing clinical procedures despite increased evidence of the need to improve the provision of child-centred care. The international ISupport collaboration aimed to develop standards to outline and explain good procedural practice and the rights of children within the context of a clinical procedure. The rights-based standards for children undergoing tests, treatments, investigations, examinations and interventions were developed using an iterative, multi-phased, multi-method and multi-stakeholder consensus building approach. This consensus approach used a range of online and face to face methods across three phases to ensure ongoing engagement with multiple stakeholders. The views and perspectives of 203 children and young people, 78 parents and 418 multi-disciplinary professionals gathered over a two year period (2020–2022) informed the development of international rights-based standards for the care of children having tests, treatments, examinations and interventions. The standards are the first to reach international multi-stakeholder consensus on definitions of supportive and restraining holds.Conclusion: This is the first study of its kind which outlines international rights-based procedural care standards from multi-stakeholder perspectives. The standards offer health professionals and educators clear evidence-based tools to support discussions and practice changes to challenge prevailing assumptions about holding or restraining children and instead encourage a focus on the interests and rights of the child.What is Known:• Children continue to experience short and long-term harm when undergoing clinical procedures despite increased evidence of the need to improve the provision of child-centred care.• Professionals report uncertainty and tensions in applying evidence-based practice to children’s procedural care. What is New:• This is the first study of its kind which has developed international rights-based procedural care standards from multi-stakeholder perspectives.• The standards are the first to reach international multi-stakeholder consensus on definitions of supportive and restraining holds.
  •  
35.
  •  
36.
  • Dyverfeldt, Petter, et al. (author)
  • MRI Turbulence Quantification
  • 2009
  • In: Proc. Intl. Soc. Mag. Reson. Med.. ; , s. 1858-
  • Conference paper (peer-reviewed)
  •  
37.
  • Dyverfeldt, Petter, et al. (author)
  • On MRI turbulence quantification
  • 2009
  • In: Magnetic Resonance Imaging. - : Elsevier BV. - 0730-725X .- 1873-5894. ; 27:7, s. 913-922
  • Journal article (peer-reviewed)abstract
    • Turbulent flow, characterized by velocity fluctuations, accompanies many forms of cardiovascular disease and may contribute to their progression and hemodynamic consequences. Several studies have investigated the effects of turbulence on the magnetic resonance imaging (MRI) signal. Quantitative MRI turbulence measurements have recently been shown to have great potential for application both in human cardiovascular flow and in engineering flow. In this article, potential pitfalls and sources of error in MRI turbulence measurements are theoretically and numerically investigated. Data acquisition strategies suitable for turbulence quantification are outlined. The results show that the sensitivity of MRI turbulence measurements to intravoxel mean velocity variations is negligible, but that noise may degrade the estimates if the turbulence encoding parameter is set improperly. Different approaches for utilizing a given amount of scan time were shown to influence the dynamic range and the uncertainty in the turbulence estimates due to noise. The findings reported in this work may be valuable for both in vitro and in vivo studies employing MRI methods for turbulence quantification.
  •  
38.
  •  
39.
  • Ekman, Diana, et al. (author)
  • Stratified genetic analysis reveals sex differences in MPO-ANCA-associated vasculitis
  • 2023
  • In: Rheumatology. - : Oxford University Press. - 1462-0324 .- 1462-0332. ; 62:9, s. 3213-3218
  • Journal article (peer-reviewed)abstract
    • Objective: To identify and genetically characterize subgroups of patients with ANCA-associated vasculitides (AAV) based on sex and ANCA subtype. Methods: A previously established SNP dataset derived from DNA sequencing of 1853 genes and genotyping of 1088 Scandinavian cases with AAV and 1589 controls was stratified for sex and ANCA subtype and analysed for association with five top AAV SNPs. rs9274619, a lead variant at the HLA-DQB1/HLA-DQA2 locus previously associated with AAV positive for myeloperoxidase (MPO)-ANCA, was analysed for association with the cumulative disease involvement of ten different organ systems. Results: rs9274619 showed a significantly stronger association to MPO-ANCA-positive females than males [P = 2.0 × 10-4, OR = 2.3 (95% CI 1.5, 3.5)], whereas proteinase 3 (PR3)-ANCA-associated variants rs1042335, rs9277341 (HLA-DPB1/A1) and rs28929474 (SERPINA1) were equally associated with females and males with PR3-ANCA. In MPO-ANCA-positive cases, carriers of the rs9274619 risk allele were more prone to disease engagement of eyes [P = 0.021, OR = 11 (95% CI 2.2, 205)] but less prone to pulmonary involvement [P = 0.026, OR = 0.52 (95% CI 0.30, 0.92)]. Moreover, AAV with both MPO-ANCA and PR3-ANCA was associated with the PR3-ANCA lead SNP rs1042335 [P = 0.0015, OR = 0.091 (95% CI 0.0022, 0.55)] but not with rs9274619. Conclusions: Females and males with MPO-ANCA-positive AAV differ in genetic predisposition to disease, suggesting at least partially distinct disease mechanisms between the sexes. Double ANCA-positive AAV cases are genetically similar to PR3-ANCA-positive cases, providing clues to the clinical follow-up and treatment of these patients.
  •  
40.
  • Ekman, Petter, 1988-, et al. (author)
  • Aerodynamic Drag Reduction - from Conceptual Design on a Simplified Generic Model to Full-Scale Road Tests
  • 2015
  • In: SAE 2015 World Congress &amp; Exhibition. - 400 Commonwealth Drive, Warrendale, PA, United States : SAE International.
  • Conference paper (peer-reviewed)abstract
    • Road transportation by trucks is the major part of the goods transportations system in the European Union (EU), and there is a need for increased fuel efficiency. While truck manufacturers already spend significant resources in order to reduce the emissions from their vehicles, most truck manufacturers do not control the shape of the trailer and/or swap bodies. These devices are usually manufactured by different companies that cannot consider the overall aerodynamics around the complete vehicle.By use of Computational Fluid Dynamics (CFD) and previous wind tunnel experiments, the flow around a simplified generic tractor-trailer model has been investigated. With better understanding of the flow features around the tractor with attached trailer or swap bodies, an improved design of the trailer and swap body can be achieved, which is the aim for the project. Special emphasis is put on achieving simple, easy to install or implement drag-reducing geometrical modifications to the trailer or swap bodies that can be mounted on existing trucks.Reynolds-Averaged Navier-Stokes (RANS) simulations were used for the conceptual development phase where trends in drag reduction due to the modified geometries were studied using a parameter study, while more advanced scale resolving simulations (SRS) were used in order to investigate the details of the flow fields.The investigation indicates that aerodynamic drag reduction is possible with quite simple geometrical modifications. Some of the results have also been verified through road tests of vehicles in commercial use, which has shown reduced fuel consumption of up to 5%.
  •  
41.
  • Ekman, Petter, 1988-, et al. (author)
  • Aerodynamic Drag Reduction of a Light Truck - from Conceptual Design to Full Scale Road Tests
  • 2016
  • In: SAE 2016 World Congress and Exhibition. - 400 Commonwealth Drive, Warrendale, PA, United States : SAE International.
  • Conference paper (peer-reviewed)abstract
    • Considerable amounts of the everyday goods transports are done using light trucks. In the last ten years (2005-2015), the number of light trucks has increased by 33 % in Sweden. The majority of these light trucks are fitted with a swap body and encounter the same problem as many other truck configurations, namely that several different manufacturers contribute to the final shape of the vehicle. Due to this, the aerodynamics of the final vehicle is often not fully considered. Hence there appears to be room for improving the aerodynamic performance. In this study the flow around a swap body fitted to a light truck has been investigated using Computational Fluid Dynamics. The focus has been on improving the shape of the swap body in order to reduce both the aerodynamic drag and fuel consumption, while still keeping it usable for daily operations. Reynolds-Averaged Navier-Stokes simulations were used for concept evaluation while more advanced Detached Eddy Simulations were performed on the best concept in order to investigate details of the flow. Various concepts were evaluated from which it could be seen that a more streamlined top of the swap body together with a lowered top trailing edge had a significant positive effect on the aerodynamic drag. A full scale light truck was equipped with a swap body with with these modifications for road tests. During a test period, a mean fuel consumption reduction of 12 % was measured, thus indicating a significantly reduced aerodynamic drag.
  •  
42.
  • Ekman, Petter, et al. (author)
  • Aerodynamics of an Unloaded Timber Truck - A CFD Investigation
  • 2016
  • In: SAE International Journal of Commercial Vehicles. - : SAE INT. - 1946-391X .- 1946-3928. ; 9:2, s. 217-223
  • Journal article (peer-reviewed)abstract
    • Reducing energy consumption and emissions are ongoing challenges for the transport sector. The increased number of goods transports emphasize these challenges even more, as greenhouse gas emissions from these vehicles increased by 20 % between 1990 and 2013, in Sweden. One special case of goods transports is the transport of timber. Today in Sweden, around 2000 timber trucks transport around six billion ton kilometers every year. For every ton kilometer these vehicles use around 0.025 liter diesel, and there should exist large possibilities to reduce the fuel consumption and the emissions for these vehicles. Timber trucks spend most of their operation time travelling in speeds of around 80 km/h. At this speed aerodynamic drag contributes to around 30 % of the total vehicle resistance, which makes the aerodynamic drag a significant part of the energy consumption. One of the big challenges with timber trucks is that they travel unloaded half of the time. This put higher demands on possible drag reduction modifications, as they need to function and be practical for both when the timber truck is loaded and unloaded. In this study an unloaded timber truck has been investigated by use of computational fluid dynamics. The recently released Stress Blended Eddy Simulation model has been used for simulating the flow over a timber truck at a Reynolds number of 1.1 million, based on the square root of its frontal area. From the results it could be seen that 52.8 % of the drag is generated by the cab. By investigating a drag reduction device that covered the gap between the bulkhead and the first stake pair, a drag reduction up to 6.7 % was possible, which shows potential for simple modifications that not influence the daily usage.
  •  
43.
  • Ekman, Petter, 1988- (author)
  • Important Factors for Accurate Scale-Resolving Simulations of Automotive Aerodynamics
  • 2020
  • Doctoral thesis (other academic/artistic)abstract
    • Road transports are responsible for almost 18 % of the greenhouse gas emission in Europe and are today the leading cause of air pollution in cities. Aerodynamic resistance has a significant effect on fuel consumption and hence the emission of vehicles. For electric vehicles, emissions are not affected by the aerodynamics as such but instead have a significant effect on the effective range of the vehicle.In 2017, a new measurement procedure was introduced, Worldwide Harmonized Light Vehicles Test Procedure (WLTP), for measuring emissions, fuel consumption, and range. This procedure includes a new test cycle with increased average driving speed compared to the former procedure, which thereby increases the importance of the aerodynamic resistance, as it drastically increases with speed. A second effect is that the exact car configuration sold to the customer needs to be certified in terms of fuel consumption and emissions. The result is that every possible combination of optional extras, which might affect the aerodynamic resistance, needs to be aerodynamically analyzed and possibly improved. From 2021, the European Commission will introduce stricter emission regulations for new passenger cars, with the fleet-wide average lowered to 95 grams CO2=km, which puts an even higher demand on achieving efficient aerodynamics.Virtual development of the aerodynamics of road vehicles is today used to a great extent, using Computational Fluid Dynamics, as it enables faster and cheaper development. However, achieving high accuracy for the prediction of the flow field and aerodynamic forces is challenging, especially given the complexity of both the vehicle geometry in itself and the surrounding flow field. Even for a simplified generic bluff body, accurately predicting the flow field and aerodynamic forces is a challenge. The main reason for this challenge of achieving results with high accuracy is the prediction of the complex behavior of turbulence. Scale-resolving simulation (SRS) methods, such as Large Eddy Simulation (LES), where most of the turbulent structures are resolved has in many studies shown high accuracy but unfortunately to a very high computational cost. It is primarily the small turbulent structures within the near-wall region that requires a _ne resolution in both space (the mesh) and in time. This fine resolution is the reason for the very high computational cost and makes LES unfeasible for practical use in industrial aerodynamic development at present and in the near future. By modeling the turbulent structures within the near-wall region using a Reynolds-Averaged Navier-Stokes (RANS) model, and resolving the turbulence outside the region with a LES model, a coarser resolution is possible to use, resulting in significantly lower computational cost. Which used RANS model is of high importance, and especially how much turbulent viscosity the model generates, as too high values can result in suppression of the resolved turbulence.The transitioning between the RANS and LES regions have a significant effect on the results. Faster transition enables more resolved turbulence, favorable for higher accuracy, but needs to be balanced with sufficient shielding of the RANS region. If resolving the turbulence occurs within the near-wall region, and the mesh is not sufficiently fine, it can result in poor accuracy.By increasing the time-step size and disregarding best-practice guides, the computational cost can be significantly reduced. The accuracy is reasonably insensitive to the larger time step sizes until a certain degree, thereby enabling computationally cheaper SRS to achieve high accuracy of aerodynamic predictions needed to meet present and future emission regulations.
  •  
44.
  • ElBeck, Zaher, et al. (author)
  • Epigenetic modulators link mitochondrial redox homeostasis to cardiac function in a sex-dependent manner
  • 2024
  • In: Nature Communications. - : Springer Nature. - 2041-1723. ; 15
  • Journal article (peer-reviewed)abstract
    • While excessive production of reactive oxygen species (ROS) is a characteristic hallmark of numerous diseases, clinical approaches that ameliorate oxidative stress have been unsuccessful. Here, utilizing multi-omics, we demonstrate that in cardiomyocytes, mitochondrial isocitrate dehydrogenase (IDH2) constitutes a major antioxidative defense mechanism. Paradoxically reduced expression of IDH2 associated with ventricular eccentric hypertrophy is counterbalanced by an increase in the enzyme activity. We unveil redox-dependent sex dimorphism, and extensive mutual regulation of the antioxidative activities of IDH2 and NRF2 by a feedforward network that involves 2-oxoglutarate and L-2-hydroxyglutarate and mediated in part through unconventional hydroxy-methylation of cytosine residues present in introns. Consequently, conditional targeting of ROS in a murine model of heart failure improves cardiac function in sex- and phenotype-dependent manners. Together, these insights may explain why previous attempts to treat heart failure with antioxidants have been unsuccessful and open new approaches to personalizing and, thereby, improving such treatment.
  •  
45.
  • Ericsson, Gunnar, et al. (author)
  • Översiktlig naturinventering Rörligt friluftsliv
  • 1983
  • Reports (other academic/artistic)abstract
    • Med rörligt. friluftsliv menas allmänheiens utnyttjande av natur­-och kulturlandskap för avkoppling, vila, upplevelser, motion, frisk luft stimulans, bär- och svampplockning, jakt, fiske osv. Ett fritidsutnyttjande av naturen således.Områden reserverade för rörligt friluftsliv, för rekreation, ska vara tillgängliga för alla och inte privatiserade för några få.Rörligt friluftsliv kan bedrivas på all allemansrättslig mark (= mark där allemansrätten gäller), men för att påstå att ett om­råde är värdefullt för rörligt friluftsliv, måste fler kriterier vara uppfyllda.Konkret kan områden för rörligt friluftsliv innehålla allt från attraktiv naturmark till hotell och restauranger. Exempelvis vandringsleder, stigar, sanitära anordningar, badplatser, semes­terbyar (= stugor för korttidsuthyrning), campingplatser, motions­anordningar, golfbanor, fågeltorn osv.Arbetet syftar till att kartlägga Gotlands resurser för rörligt friluftsliv, främst de resurser, som natur- och kulturlandskapet utgör.Inventeringen visar översiktligt de marker, som är attraktiva och lämpliga att använda som rekreationsområden. Inventeringen är således resursorienterade. Denna dokumentation av områden vär­defulla för det rörliga friluftslivet bör bli vägledande vid kommande ställningstaganden (efter behovsanalys) i olika plane­ringsfrågor.
  •  
46.
  • Fattahi, Sadegh, et al. (author)
  • Aerodynamic Improvement of a Loaded Timber Truck
  • 2023
  • In: SAE technical paper series. - 400 Commonwealth Drive, Warrendale, PA, United States : SAE International. - 0148-7191.
  • Journal article (peer-reviewed)
  •  
47.
  •  
48.
  • Fändriks, Anna, et al. (author)
  • Gait biomechanics in patients with intra-articular tibial plateau fractures - gait analysis at three months compared with age- and gender-matched healthy subjects
  • 2021
  • In: Bmc Musculoskeletal Disorders. - : Springer Science and Business Media LLC. - 1471-2474. ; 22:1
  • Journal article (peer-reviewed)abstract
    • Introduction Tibial plateau fractures involve the knee joint, one of the most weight-bearing joints in the body. Studies have shown that gait asymmetries exist several years after injury. Instrumental gait analysis, generating both kinematic and kinetic data from patients with tibial plateau fractures, is uncommon. Aim To examine walking ability and knee range of motion in patients suffering intra-articular tibial plateau fractures. Method Twenty participants, eight males and 12 females, aged 44 years (range 26-60), with unilateral isolated tibial plateau fractures, were examined 12 weeks (range 7-20) after injury. The investigation consisted of passive range of motion (ROM) using a goniometer, six-minute walking test (6 MW), pain estimation using the visual analogue scale (VAS), the "Knee injury and Osteoarthritis Outcome Score" (KOOS) self-assessment questionnaire and instrumental 3-dimensional gait analysis (3DGA). 3DGA included spatiotemporal variables (speed, relative stance time, step length), kinematic variables (knee flexion, knee extension, ankle dorsiflexion) and kinetic variables (generating knee power (extension) and ankle power (plantarflexion)). A skin marker model with twenty reflective markers was used. Non-parametric tests were used for comparisons of the injured leg, the uninjured leg and a reference group. Result The participants walked more slowly compared with healthy references (p < 0.001). Stance time and step length was shorter for the injured side compared with the uninjured side (p < 0.014). Step length was shorter compared with the reference group (p = 0.001). The maximum knee extension in the single stance phase was worse in the injured side compared with the uninjured side and the reference group (p < 0.001) respectively. The maximum ankle dorsiflexion during stance phase was higher in the injured leg compared with the uninjured side and the reference group (p < 0.012). Maximum generated power in the knee was lower in the injured side compared with the uninjured side and the reference group (p < 0.001 respectively). The same was true of maximum power generated in the ankle (p < 0.023). The median KOOS value was lower in the study group (p < 0.001). ROM showed decreased flexion and extension in the knee joint and decreased dorsiflexion in the ankle joint compared with the uninjured side (p < 0.006). The average distance in the six-minute walking test was shorter in the study group (p < 0.001). Conclusion Patients who have sustained tibial plateau fractures generally display a limitation in their walking pattern 3 months after injury. These limitations are mainly related to the inability to extend the knee.
  •  
49.
  • Grävare Silbernagel, Karin, 1965, et al. (author)
  • A new measurement of heel-rise endurance with the ability to detect functional deficits in patients with Achilles tendon rupture.
  • 2010
  • In: Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA. - : Springer Science and Business Media LLC. - 1433-7347. ; 18:2, s. 258-64
  • Journal article (peer-reviewed)abstract
    • Studies evaluating treatment effects on muscle function after an Achilles tendon rupture often use various tests for evaluating calf muscle strength. However, these tests rarely demonstrate the difference between treatment groups; therefore, new tests with a higher ability to detect possible differences in outcome are needed. The purpose of this study was to evaluate the validity and ability to detect differences in outcome of a heel-rise work test that would measure both the height of each heel-rise and the number of repetitions. Seventy-eight patients (65 men and 13 women) at a mean (standard deviation) age of 42 (9) years with Achilles tendon ruptures were included. The patients were evaluated with the new heel-rise test at 6 and 12 months after injury. The limb symmetry index (LSI = involved/uninvolved x 100) was calculated to determine the size of the difference in function between the injured and the uninjured side. The heel-rise height differed significantly between the injured and uninjured sides at the 6- and 12-month evaluations (P < 0.001). At the 6-month evaluation, the patients had achieved a mean LSI of 84% on the number of repetitions parameter but only a mean LSI of 61% on the work parameter. At the 12-month evaluation the mean, LSI of the heel-rise repetition parameter was 95%, indicating that the patients had fully recovered function, but on the work parameter the mean LSI was only 76%. The heel-rise work test in the present study has good validity and greater ability to detect differences between the injured and the uninjured sides than a test that measures only the number of heel-rise repetitions in patients with Achilles tendon rupture.
  •  
50.
  • Grävare Silbernagel, Karin, 1965, et al. (author)
  • Continued sports activity, using a pain-monitoring model, during rehabilitation in patients with Achilles tendinopathy: a randomized controlled study
  • 2007
  • In: Am J Sports Med. - : SAGE Publications. - 0363-5465. ; 35:6, s. 897-906
  • Journal article (peer-reviewed)abstract
    • BACKGROUND: Achilles tendinopathy is a common overuse injury, especially among athletes involved in activities that include running and jumping. Often an initial period of rest from the pain-provoking activity is recommended. PURPOSE: To prospectively evaluate if continued running and jumping during treatment with an Achilles tendon-loading strengthening program has an effect on the outcome. STUDY DESIGN: Randomized clinical control trial; Level of evidence, 1. METHODS: Thirty-eight patients with Achilles tendinopathy were randomly allocated to 2 different treatment groups. The exercise training group (n = 19) was allowed, with the use of a pain-monitoring model, to continue Achilles tendon-loading activity, such as running and jumping, whereas the active rest group (n = 19) had to stop such activities during the first 6 weeks. All patients were rehabilitated according to an identical rehabilitation program. The primary outcome measures were the Swedish version of the Victorian Institute of Sports Assessment-Achilles questionnaire (VISA-A-S) and the pain level during tendon-loading activity. RESULTS: No significant differences in the rate of improvements were found between the groups. Both groups showed, however, significant (P < .01) improvements, compared with baseline, on the primary outcome measure at all the evaluations. The exercise training group had a mean (standard deviation) VISA-A-S score of 57 (15.8) at baseline and 85 (12.7) at the 12-month follow-up (P < .01). The active rest group had a mean (standard deviation) VISA-A-S score of 57 (15.7) at baseline and 91 (8.2) at the 12-month follow-up (P < .01). CONCLUSIONS: No negative effects could be demonstrated from continuing Achilles tendon-loading activity, such as running and jumping, with the use of a pain-monitoring model, during treatment. Our treatment protocol for patients with Achilles tendinopathy, which gradually increases the load on the Achilles tendon and calf muscle, demonstrated significant improvements. A training regimen of continued, pain-monitored, tendon-loading physical activity might therefore represent a valuable option for patients with Achilles tendinopathy.
  •  
Skapa referenser, mejla, bekava och länka
  • Result 1-50 of 189
Type of publication
journal article (110)
conference paper (46)
reports (15)
book chapter (7)
other publication (4)
doctoral thesis (4)
show more...
book (2)
licentiate thesis (1)
show less...
Type of content
peer-reviewed (136)
other academic/artistic (45)
pop. science, debate, etc. (8)
Author/Editor
Berger, N. (14)
Bracinik, J. (14)
Bruncko, D. (14)
Caron, S. (14)
Cerny, K. (14)
Desch, K. (14)
show more...
Fleischmann, P. (14)
Katzy, J. (14)
Klein, M. (14)
Laycock, P. (14)
Lobodzinska, E. (14)
Meier, K. (14)
Meyer, J. (14)
Naumann, T. (14)
Nikiforov, A. (14)
Rizvi, E. (14)
Rurikova, Z. (14)
Schoeffel, L. (14)
Schwanenberger, C. (14)
South, D. (14)
Tsipolitis, G. (14)
Valkar, S. (14)
Wessels, M. (14)
Xella, S. (14)
Zhang, Z. (14)
Diaconu, C. (14)
Ferencei, J. (14)
Greenshaw, T. (14)
Ibbotson, M. (14)
Kluge, T. (14)
Lendermann, V. (14)
Haller, J. (14)
Zhokin, A. (14)
Aktas, A. (14)
Kostka, P. (14)
Lebedev, A. (14)
Placakyte, R. (14)
Levonian, S. (14)
Marshall, R. (14)
Andreev, V. (14)
Asmone, A. (14)
Backovic, S. (14)
Barrelet, E. (14)
Bartel, W. (14)
Behnke, O. (14)
Belousov, A. (14)
Boudry, V. (14)
Brisson, V. (14)
Bunyatyan, A. (14)
Buschhorn, G. (14)
show less...
University
University of Gothenburg (56)
Lund University (49)
Linköping University (45)
Uppsala University (15)
Stockholm University (13)
Chalmers University of Technology (12)
show more...
RISE (7)
Umeå University (6)
Jönköping University (3)
Mid Sweden University (3)
Linnaeus University (3)
Karolinska Institutet (3)
Swedish University of Agricultural Sciences (3)
Royal Institute of Technology (2)
Luleå University of Technology (2)
Örebro University (1)
Swedish Environmental Protection Agency (1)
University of Borås (1)
Swedish Museum of Natural History (1)
show less...
Language
English (171)
Swedish (18)
Research subject (UKÄ/SCB)
Medical and Health Sciences (65)
Natural sciences (50)
Engineering and Technology (48)
Social Sciences (5)
Agricultural Sciences (1)

Year

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Close

Copy and save the link in order to return to this view