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- Carlsson, Magnus, et al.
(författare)
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The acute effects of a short technique-intense training period on side-foot kick performance among elite female soccer players
- 2019
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Ingår i: Journal of Sports Medicine and Physical Fitness. - 0022-4707 .- 1827-1928. ; 59:9, s. 1442-1449
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Previously, it was shown that elite soccer teams were 24% more likely to win matches if their passing effectiveness were increased by 1%. However, research interventions aiming to improve passing performance are scarce. The current study aimed to investigate the effect of a short technique-intense training period on side-foot kick performance among elite female soccer players.METHODS: Four side-foot kick tests were completed before and after a training period: kicking a stationary ball using match-relevant (SBRS) and maximal ball speed (SBMS), passing the ball on the move using match-relevant ball speed (RBRS), and repeated side-foot kicks onto a rebound-box with continuously increasing passing distance (RRB). The players were assigned to either the intervention group or the control group. The training intervention consisted of six 55-min training sessions with five side-foot kick exercises. Within-group and between-group differences were investigated using paired-samples t-test and Mann-Whitney U test, respectively.RESULTS: The intervention group improved the performance in the RBRS and RRB tests (both P < 0.05), but no differences were found for the SBRS and SBMS tests (both P > 0.05). No improvements were found for the control group independent of test condition (all P > 0.05). Significant between-group differences were found for the RBRS and RRB tests (both P < 0.05), whereas no differences were found for the SBRS and SBMS tests (both P > 0.05).CONCLUSIONS: The fundamental soccer skill of passing a moving ball was improved in elite female soccer players by a short technique-intense training period.
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| 2. |
- Carlsson, Magnus, et al.
(författare)
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The effect of training on side foot-kick performance among swedish first league women´s soccer players
- 2018
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Konferensbidrag (refereegranskat)abstract
- THE EFFECT OF TRAINING ON SIDE FOOT-KICK PERFORMANCE AMONG SWEDISH FIRST LEAGUE WOMEN’S SOCCER PLAYERSCarlsson, M.1, Isberg, J.1, Nilsson, J.1, Carlsson, T.1 1: Dalarna University (Falun, Sweden)IntroductionA high completion rate for passes is important for success in soccer, because longer passing sequences are related to more scored goals (Hughes & Franks, 2005). In a recent study, it was found that female players had a lower pass-completion rate than male players at the highest competitive standard of European soccer, which suggests that elite female players in general do not have the same technical characteristics as elite male players (Paul S. Bradley et al., 2014). The purpose of the study was investigate the effect of a 2-week training intervention on side foot-kick performance among Swedish first league women’s soccer players. MethodsTo investigate the effect of training on side foot-kick performance, a pre-post-intervention study was implemented where four side foot-kick tests were performed before and after a 2-week training period. The side foot-kick accuracy were investigated when kicking a stationary ball using match-relevant ball speed (SBRS) and maximal ball speed (SBMS) as well as subsequent to a 5-m run with the ball from different approach angles (0°, 30°, and 60°) to a predetermined position, where passing of the ball on the move was executed using match-relevant ball speed (RBRS). The fourth test comprised repeated side-foot kicks onto a rebound-box with continuously increasing passing distance (RRB).Based on the results from the pre-tests, the players were assigned to either the intervention group (INT) or the control group (CON). The training intervention consisted of six 55-min training sessions. In each session, two rounds of five exercises focusing on improvement of side foot-kick accuracy were executed. Within-group and between-group differences were investigated using paired samples Student’s t-tests and Mann-Whitney U tests, respectively.ResultsPrior to the training intervention, there were no significant differences between the groups for any of the investigated test variables. The INT group improved RBRS (P = 0.036) and RRB (P = 0.010) during the training intervention, whereas no significant within-group changes were found for either SBRS or SBMS (both P > 0.05). No within-group differences were found for any of the test variables in the CON group (all P > 0.05). Significant between-group differences were found for RBRS (P = 0.040) and RRB (P = 0.005), whereas no differences were found for either SBRS or SBMS (both P > 0.05).ConclusionThe fundamental soccer skill of passing a moving ball could be improved in elite women players by a 2-week training period focusing on improving side foot-kick performance.ReferencesBradley PS, Carling C, Diaz AG, Hood P, Barnes C, Ade J, Boddy M, Krustrup P, Mohr M (2013) Hum Mov Sci, 32, 808-821.Hughes M, Franks I (2005) J Sports Sci, 23, 509-514.
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| 4. |
- Elvstam, O., et al.
(författare)
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Is low-level HIV-1 viraemia associated with elevated levels of markers of immune activation, coagulation and cardiovascular disease?
- 2019
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Ingår i: HIV Medicine. - : Wiley. - 1464-2662 .- 1468-1293. ; 20:9, s. 571-580
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Tidskriftsartikel (refereegranskat)abstract
- Objectives: The clinical significance of low-level viraemia (LLV) during antiretroviral therapy (ART) is debated. We retrospectively investigated longitudinal levels of plasma markers associated with inflammation, altered coagulation and cardiovascular disease in Swedish HIV-positive adults in relation to LLV or permanent virological suppression during long-term ART. Methods: Plasma levels of C-reactive protein (CRP), D-dimer, vascular cell adhesion molecule 1 (VCAM-1), suppression of tumorigenicity 2 (ST2), growth differentiation factor 15 (GDF-15), soluble CD14 (sCD14), soluble CD163 (sCD163), interferon-γ-induced protein 10 (IP-10) and β-2-microglobulin were measured in 34 individuals with LLV (viral load 50–999 HIV-1 RNA copies/mL) and in matched controls with persistent virological suppression. Biomarker levels were analysed in samples obtained during episodes of LLV and follow-up samples obtained 1year later (with similar timing for controls). All biomarkers were analysed using an independent sample t-test and analysis of covariance (ANCOVA) after logarithmic transformation. Log-rank analysis was applied for markers with concentration values out of range. Results: Compared with controls, patients with LLV had significantly higher levels of GDF-15 [geometric mean 3416 (95% confidence interval (CI) 804–14516) pg/mL versus 2002 (95% CI 355–11295) pg/mL in controls; P=0.026] and D-dimer [mean 1114 (95% CI 125–9917) ng/mL versus 756 (95% CI 157–3626) ng/mL; P=0.038] after adjustment for age, CD4 count nadir and type of ART. In the unadjusted t-test, only GDF-15 was significantly higher and in the log-rank test, both GDF-15 and D-dimer were significantly elevated. No significant differences were observed for the other biomarkers analysed. Conclusions: Although levels of inflammation markers were similar in ART recipients with and without LLV, persons with LLV had significantly higher levels of GDF-15 and D-dimer. These findings suggest a potential link between LLV and cardiovascular outcomes. © 2019 British HIV Association
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| 5. |
- Elvstam, Olof, et al.
(författare)
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Virological failure and all-cause mortality in HIV-positive adults with low-level viremia during antiretroviral treatment
- 2017
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Ingår i: Plos One. - : Public Library of Science (PLoS). - 1932-6203. ; 12:7
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Tidskriftsartikel (refereegranskat)abstract
- Objective Although most HIV-infected individuals achieve undetectable viremia during antiretroviral therapy (ART), a subset have low-level viremia (LLV) of varying duration and magnitude. The impact of LLV on treatment outcomes is unclear. We investigated the association between LLV and virological failure and/or all-cause mortality among Swedish patients receiving ART. HIV-infected patients from two Swedish HIV centers were identified from the nationwide register InfCare HIV. Subjects aged >= 15 years with triple agent ART were included at 12 months after treatment initiation if >= 2 following viral load measurements were available. Patients with 2 consecutive HIV RNA values >= 1000 copies/mL at this time point were excluded. Participants were stratified into four categories depending on viremia profiles: permanently suppressed viremia (<50 copies/mL), LLV 50-199 copies/mL, LLV 200-999 copies/mL and viremia >= 1000 copies/mL. Association between all four viremia categories and all-cause death was calculated using survival analysis with viremia as a time-varying covariate, so that patients could change viremia category during follow-up. Association between the three lower categories and virological failure >= 2 consecutive measurements >= 1000 copies/mL) was calculated in a similar manner. LLV 50-199 copies/mL was recorded in 70/1015 patients (6.9%) and LLV 200-999 copies/mL in 89 (8.8%) during 7812 person-years of follow-up (median 6.5 years). LLV 200-999 copies/mL was associated with virological failure (adjusted hazard ratio 3.14 [95% confidence interval 1.41-7.03, p<0.01]), whereas LLV 50-199 copies/mL was not (1.01 [0.34-4.31, p = 0.99]; median follow-up 4.5 years). LLV 200-999 copies/mL had an adjusted mortality hazard ratio of 2.29 (0.98-5.32, p = 0.05) and LLV 50-199 copies/mL of 2.19 (0.90-5.37, p = 0.09). In this Swedish cohort followed during ART for a median of 4.5 years, LLV 200-999 copies/mL was independently associated with virological failure. Patients with LLV had higher rates of all-cause mortality, although not statistically significant in multivariate analysis.
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| 7. |
- Jensen, Jette Nygaard, et al.
(författare)
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Comparison of antibiotic prescribing and antimicrobial resistance in urinary tract infections at the municipal level among women in two Nordic regions
- 2018
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Ingår i: Journal of Antimicrobial Chemotherapy. - : Oxford University Press (OUP). - 0305-7453 .- 1460-2091. ; 73:8, s. 2207-2214
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Tidskriftsartikel (refereegranskat)abstract
- Objectives: To describe and compare the prescribing of antibiotics used for urinary tract infections and its correlation with resistance in Escherichia coli in urinary samples across two adjacent regions - the Capital Region and the Skaane Region - and their municipalities in Denmark and Sweden. Methods: The Capital Region consists of 29 municipalities and 725 960 female inhabitants aged ≥18 years and the Skaane Region consists of 33 municipalities and 515 668 female inhabitants aged ≥18 years. Aggregated data from outpatient care on the prescribing of pivmecillinam, trimethoprim and nitrofurantoin from both regions were analysed. The Department of Clinical Microbiology in both regions provided data on E. coli resistance in urinary samples from women aged ≥18 years. Data were measured as the number of prescriptions/1000 women/year, number of DDDs/1000 women/year and DDDs/prescription. Correlation analyses between antibiotic prescribing and antibiotic resistance rates were performed. Results: Antibiotic prescribing and resistance rates were significantly higher in the Capital Region compared with the Skaane Region. Large variations in prescription and resistance rates were found at the municipal level, but there were no correlations between the antibiotic prescription and resistance rates when each region was analysed separately. Conclusions: Although closely related, there are large differences in antibiotic prescribing and antibiotic resistance. It is suggested that the regional guidelines are an important driver and explanatory factor for the variations; however, further research is needed in this new field and factors such as the influence of cultural aspects should be the target of further research.
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| 8. |
- Land, Magnus, et al.
(författare)
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How do selected crop rotations affect soil organic carbon in boreo-temperate systems? A systematic review protocol
- 2017
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Ingår i: Environmental Evidence. - : Springer Science and Business Media LLC. - 2047-2382. ; 6:1
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Forskningsöversikt (refereegranskat)abstract
- Background: Soils are important global carbon pools that are under threat from intensive land use through a variety of agricultural practices. Sustainable management of agricultural soils may have the potential to mitigate climate change through increased carbon sequestration and increase their fertility. Among management practices to increase carbon sequestration, crop rotation designs have often been tested on yield effects in long-term agricultural experiments. However, in these studies, soil organic carbon (SOC) was monitored but not always the key objective. Thus, here we provide a method for a systematic review to test the effects of common crop rotations on SOC sequestration to provide evidence on the most sustainable management regimes that can promote SOC storage. Methods: This systematic review incorporates studies concerning selected crop rotations (rotations-vs-monocultures, legumes-vs-no legumes, and perennials-vs-annuals) collated in a recently completed systematic map on the effect of agricultural management on SOC, restricted to boreo-temperate systems (i.e., the warm temperate climate zone). Some 208 studies relevant for this systematic review were identified in the systematic map. An update of the original search (September 2013) will be undertaken to identify newly published academic and grey literature. Studies will be critically appraised for their internal and external validity, followed by full data extraction (meta-data describing study settings and quantitative study results). Where possible, studies will be included in meta-analyses examining the effects of the different rotational practices. Implications of the findings will be discussed in terms of policy, practice and research, and the nature of the evidence base.
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