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  • Gilenstam, Kajsa, et al. (författare)
  • Body Composition of Women’s Ice Hockey Players : Comparison of Estimates Using Skinfolds and iDXA
  • 2019
  • Ingår i: Journal of Strength and Conditioning Research. - : Wolters Kluwer. - 1064-8011 .- 1533-4287. ; 33:9, s. 2496-2502
  • Tidskriftsartikel (refereegranskat)abstract
    • The purpose of this study was to compare percent fat (% Fat) estimates from anthropometric equations using skinfolds (SKF) in women’s ice hockey players to estimates obtained from Lunar iDXA. Data were collected on 19 elite female Swedish hockey players (mean age ± SD = 18.4 ± 2.4 y). Four skinfolds (SKF) (triceps, abdominal, suprailiac, and thigh) were measured within two hours of iDXA assessments. The % Fat estimates from iDXA and four anthropometric equations were compared using paired t-tests, and a one-way ANOVA was used to compare % Fat estimates from the anthropometric equations. Bland Altman analyses were used to assess agreement between % Fat estimates from SKF and iDXA. The significance level was set a priori at p<0.05. The % Fat estimates from anthropometric equations were significantly lower than those from iDXA (mean ± SD: 26.85 ± 4.93%,p=0.000). Bland Altman analyses indicated mean differences of -7.96 to -10.13 percentage points between anthropometric equations and iDXA. Estimates of % Fat from anthropometric equations (range: 16.72% to 18.89%) were within the range reported in earlier studies using the Sum of 7 SKF. Thus, SKF offer a reasonable alternative to iDXA for this population, but result in underestimates of % Fat relative to iDXA. Strength and conditioning coaches should use the same body composition assessment method consistently, and interpret the results with caution, as they are estimates and not true values.
  • Gonzalez-Calvo, Gustavo, et al. (författare)
  • 'I feel, therefore I am' : unpacking preservice physical education teachers' emotions
  • 2020
  • Ingår i: Sport, Education and Society. - : Routledge. - 1357-3322 .- 1470-1243. ; 25:5, s. 543-555
  • Tidskriftsartikel (refereegranskat)abstract
    • The teaching profession requires an understanding of teachers' and students' emotions, and teachers' emotions can influence their teaching practice, professional development and pedagogical approaches. Furthermore, emotions are embodied and they may have a detrimental effect on wellbeing if they are not addressed properly. This paper explores the emotional dimensions of preservice primary teachers' practicum experiences in physical education (PE). Body journals were used to collect data which were analysed using a Sociology of Emotions (SoE) approach. The findings revealed that preservice teachers' emotions manifest physically during their practicum, especially at particular junctures, such as at the beginning of their teaching. Preservice teachers felt the need to make a 'good impression' within the school through the regulation of their emotions as they faced continual challenges to succeed in unfamiliar teaching circumstances. The conclusions of this study demonstrate the benefits of providing opportunities for preservice PE teachers to reflect on their emotions during the practicum and the consequences that these may have on their bodies and teaching practices.
  • Jouper, John, et al. (författare)
  • Mindful Recovery : A Case Study of a Burned-Out Elite Shooter
  • 2013
  • Ingår i: The Sport psychologist. - : Human Kinetics. - 0888-4781 .- 1543-2793. ; 27:1, s. 92-102
  • Tidskriftsartikel (refereegranskat)abstract
    • Research on how to recover from athlete burnout is scarce. The current aim is therefore to describe an intervention with an elite shooter suffering from burnout, and the use of mindfulness and Qigong to reestablish sport functioning as well as general well-being. The participant used mindfulness and Qigong exercise on a daily basis. Exercise frequency, exercise time, concentration level and Qigong state were noted daily, and levels of stress, energy and primordial force were self-rated weekly for 20 weeks, and followed up after 30, 40 and 50 weeks. The participant recovered from burnout to a state of general well-being (energy and primordial force changed from weak to strong), and her ability to stay concentrated in a Qigong state changed from weak to strong. Her capacity to shoot high scores was reestablished, even if her shooting endurance was not fully recovered. Mindfulness and Qigong techniques may be useful in the prevention of and recovery from athlete burnout.
  • Varea, Valeria, 1983- (författare)
  • Exploring the origins and consequences of Health and Physical Education undergraduates’ body dispositions
  • 2013
  • Ingår i: The International Journal of Sport and Society. - : Common Ground Research Networks. - 2152-7857 .- 2152-7865. ; 3:3, s. 207-218
  • Tidskriftsartikel (refereegranskat)abstract
    • There is considerable literature that supports the proposition that the body is central concern for Health and Physical Education (HPE) professionals. This particular group of individuals has certain dispositions with regard to the body that can be readily conveyed to their students in intentional and unintentional ways through pedagogical encounters. This paper will discuss how a group of undergraduate HPE students think about and consider the body. Taking a poststructuralist perspective and drawing mainly on the work of Foucault, in-depth interviews were used as method to explore how these HPE undergraduates came to shape their particular dispositions across time. Three main themes emerged: the ‘normal’ body, fat bodies and the HPE teacher’s body. Findings from this study will be helpful in understanding HPE undergraduates’ body dispositions and how they shape up their idea of teaching.
  • Gylling, Anne Theil, et al. (författare)
  • The influence of prolonged strength training upon muscle and fat in healthy and chronically diseased older adults
  • 2020
  • Ingår i: Experimental Gerontology. - : Elsevier. - 0531-5565 .- 1873-6815. ; 136
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Physical muscle function and brain hippocampus size declines with age, accelerating after the age of 60. Strength training over a few months improves physical function, but less is known about how long-term strength training affects physical function and hippocampus volume. Therefore, we aimed to investigate the effect of 1-year strength training of two different intensities upon muscle mass, function, and hippocampus volume in retirement-age individuals.Methods: In this multidisciplinary randomized controlled trial (clinicaltrials.gov: NCT02123641), participants were allocated to either a) supervised, heavy resistance training (HRT, n = 149, 3/wk), b) moderate intensity resistance training (MIT, n = 154, 3/wk) or c) non-exercise activities (CON, n = 148). 451 participants were randomized (62-70 yrs., women 61%, approximate to 80% with a chronic medical disease) and 419 were included in the intention-to-treat analysis (n = 143, 144 and 132; HRT, MIT and CON). Changes in muscle power (primary outcome), strength and size, physical function, body composition, hippocampus volume and physical/mental well-being were analyzed.Findings: Of the participants (HRT + MIT), 83% completed training at least 2/week. Leg extensor power was unchanged in all groups, but strength training had a positive effect on isometric knee extensor strength in both groups, whereas an increased muscle mass, cross-sectional area of vastus lateralis muscle, a decreased whole-body fat percentage, visceral fat content and an improved mental health (SF-36) occurred in HRT only. Further, chair-stand performance improved in all groups, whereas hippocampus volume decreased in all groups over time with no influence of strength training.Interpretation: Together, the results indicate that leg extensor power did not respond to long-term supervised strength training, but this type of training in a mixed group of healthy and chronically diseased elderly individuals can be implemented with good compliance and induces consistent changes in physiological parameters of muscle strength, muscle mass and abdominal fat.
  • Nilsson, Johnny, et al. (författare)
  • Running economy and blood lactate accumulation in elite football players with high and low maximal aerobic power
  • 2015
  • Ingår i: LASE Journal of Sport Science. - Riga : Latvian Academy of Sport Education in Riga, Latvia. - 1691-7669 .- 1691-9912. ; 6:2, s. 44-51
  • Tidskriftsartikel (refereegranskat)abstract
    • The purpose was to determine running economy and lactate threshold among a selection of male elite football players with high and low aerobic power. Forty male elite football players from the highest Swedish division ("Allsvenskan") participated in the study. In a test of running economy (RE) and blood lactate accumulation the participants ran four minutes each at 10, 12, 14, and 16 km•h-1 at horizontal level with one minute rest in between each four minutes interval. After the last sub-maximal speed level the participants got two minutes of rest before test of maximal oxygen uptake (VO2max). Players that had a maximal oxygen uptake lower than the average for the total population of 57.0 mL O2•kg-1•minute-1 were assigned to the low aerobic power group (LAP) (n=17). The players that had a VO2max equal to or higher than 57.0 mL O2•kg-1•minute-1 were selected for the high aerobic power group (HAP) (n=23). The VO2max was significantly different between the HAP and LAP group. The average RE, measured as oxygen uptake at 12, 14 and 16km•h-1 was significantly lower but the blood lactate concentration was significantly higher at 14 and 16 km•h-1for the LAP group compared with the HAP group.
  • Sundell, Claes-Göran, et al. (författare)
  • Stress Fractures of Pars Interarticularis in Adolescent Athletes a Classification System with MRI and CT Enabling Evaluation of The Healing Process
  • 2018
  • Ingår i: Journal of Exercise, Sports & Orthopedics. - 2374-6904. ; 5:1
  • Tidskriftsartikel (refereegranskat)abstract
    • Introduction: The purpose of this study was to evaluate healing frequency in different stages of stress reactions in the Pars Interarticularis (PI) using a classification system with MRI and CT. The intervention was 3-month rest from physical activity, without a brace, with the exception of activities of daily living.Materials & Method: Twelve adolescent athletes with different stages of Spondolysis were included in the study. They had pathology in the Pars Interarticularis and were clinically examined with MRI and CT 3-6 weeks after debut of Low Back Pain (LBP) and re-evaluated after 3 months intervention with rest from physical activity.Results: A combination of MRI and CT scanning to investigate suspected injuries to Pars Interarticularis in adolescent athletes revealed 6 different stages of Spondolysis that ranged from marrow oedema to pseudoarthrosis. After 3 months of rest from physical activity the early stages of Pars Interarticularis injuries healed significantly better than the later stages with rest from physical activity.Conclusion: The combination of MRI and CT revealed 6 stages of stress reactions instead of 4 as in Hollenberg’s staging with MRI only. In the 3 earliest stages, of these 6, rest from physical activity for 3 months can heal the stress reaction.
  • Röijezon, Ulrik, et al. (författare)
  • An Initial Study on the Coordination of Rod and Line Hauling Movements in Distance Fly Casting
  • 2017
  • Ingår i: Projekt: Rörelsekontroll och effektivitet vid flugkastning. - : Asian Exercise and Sport Science Association. ; 5:2, s. 61-72
  • Tidskriftsartikel (refereegranskat)abstract
    • Background. The double haul is a unique feature of single-handed fly casting and is used in both fly fishing and fly casting competition. The movement behaviour during the double haul has not been investigated in previous research.Objectives. Describe the coordination of the rod and line hauling movements during distance fly casting.Methods. Elite fly casters performed distance casting with four different fly rod and fly line set-ups used in fly fishing and fly casting competition. Rod and hauling movements were measured with a 3D motion analysis system.Results. The rod and line hauling movements were coordinated in an order whereby peak translational speed of the rod occurs prior to the peak speed of the angular rotation of the rod, and the peak speed of the angular rotation of the rod occurs prior to the peak speed of the line haul. This was consistent for all cast sequences, i.e., the back and forward false casts and the delivery cast, and for all four equipment set-ups, i.e., a shooting-head line cast with a relatively stiff fly rod and a long-belly line cast with three different fly rods with different stiffness and action curves. Results also showed differences in movement coordination between cast sequences and rod and line set-ups.Conclusion. Among elite casters, single-handed fly casting with double haul is coordinated in an order of events whereby the peak speed occurs first for the translation of the rod, then for the rotation of the rod and finally for the line haul.
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