| 1. |
- Alricsson, Marie, et al.
(författare)
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Spinal alignment, mobility of the hip and thoracic spine and prevalence of low back pain in young elite cross-country skiers.
- 2016
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Ingår i: Journal of Exercise Rehabilitation. - Seoul : Korean Society of Exercise Rehabilitation. - 2288-176X .- 2288-1778. ; 12:1, s. 21-28
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Tidskriftsartikel (refereegranskat)abstract
- This study investigated the association between spinal alignment, mobility of the hips and the thoracic spine and low back pain in adolescent cross-country skiers. Cohort of 51 elite cross-country skiers from a cross-country skiing high school in Sweden participated in the study. Sagittal spinal alignment, active range of motion in flexion, extension and rotation of the thoracic spine as well as passive and active extension of the hips were measured. The participants also completed a questionnaire regarding training, competition, skiing technique and occurrence of low back pain. A simple linear regression was calculated to predict pain score based on thoraco-lumbar relation, with a significant (P<0.05) regression equation of y=-0.069x+2.280 (standard error of estimate, 0.034). Participants with greater lordosis than kyphosis were more likely to suffer from low back pain than subjects without this offset. Thoracic mobility and passive or active hip extension showed no correlation with low back pain. Sagittal spinal alignment seems to be related with low back pain among young elite cross-country skiers. This study shows that range of motion of the thoracic spine and hips do not have an effect on the prevalence of low back pain in this population.
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| 2. |
- Archer, Trevor, et al.
(författare)
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Physical exercise ameliorates deficits induced by traumatic brain injury
- 2012
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Ingår i: Acta Neurologica Scandinavica. - : Hindawi Limited. - 0001-6314 .- 1600-0404. ; 125:5, s. 293-302
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Forskningsöversikt (refereegranskat)abstract
- The extent and depth of traumatic brain injury (TBI) remains a major determining factor together with the type of structural insult and its location, whether mild, moderate or severe, as well as the distribution and magnitude of inflammation and loss of cerebrovascular integrity, and the eventual efficacy of intervention. The influence of exercise intervention in TBI is multiple, ranging from anti-apoptotic effects to the augmentation of neuroplasticity. Physical exercise diminishes cerebral inflammation by elevating factors and agents involved in immunomodulatory function, and buttresses glial cell, cerebrovascular, and blood-brain barrier intactness. It provides unique non-pharmacologic intervention that incorporate different physical activity regimes, whether dynamic or static, endurance or resistance. Physical training regimes ought necessarily to be adapted to the specific demands of diagnosis, type and degree of injury and prognosis for individuals who have suffered TBI. © 2012 John Wiley & Sons A/S.
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| 3. |
- Björklund, Glenn, 1972-, et al.
(författare)
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Using Bilateral Functional and Anthropometric Tests to Define Symmetry in Cross-Country Skiers
- 2017
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Ingår i: Journal of Human Kinetics. - : Walter de Gruyter GmbH. - 1640-5544 .- 1899-7562. ; 60:1, s. 9-18
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to evaluate the symmetry of anthropometry and muscle function in cross-country skiers and their association to vertical jumping power. Twenty cross-country skiers were recruited (21.7 +/- 3.8 yrs, 180.6 +/- 7.6 cm, 73.2 +/- 7.6 kg). Anthropometric data was obtained using an iDXA scan. VO2max was determined using the diagonal stride technique on a ski treadmill. Bilateral functional tests for the upper and lower body were the handgrip and standing heel-rise tests. Vertical jump height and power were assessed with a counter movement jump. Percent asymmetry was calculated using a symmetry index and four absolute symmetry index levels. At a group level the upper body was more asymmetrical with regard to lean muscle mass (p = 0.022, d = 0.17) and functional strength (p = 0.019, d = 0.51) than the lower body. At an individual level the expected frequencies for absolute symmetry level indexes showed the largest deviation from zero for the heel-rise test (chi 2 = 16.97, p = 0.001), while the leg lean mass deviated the least (chi 2 = 0.42, p = 0.517). No relationships were observed between absolute symmetry level indexes of the lower body and counter movement jump performance (p > 0.05). As a group the skiers display a more asymmetrical upper body than lower body regarding muscle mass and strength. Interestingly at the individual level, despite symmetrical lean leg muscle mass the heel-rise test showed the largest asymmetry. This finding indicates a mismatch in muscle function for the lower body.
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| 4. |
- Fröberg, Andreas, 1985, et al.
(författare)
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Awareness of current recommendations and guidlines regarding strength training for youth
- 2014
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Ingår i: International Journal of Adolescent Medicine and Health. - : Walter de Gruyter GmbH. - 0334-0139 .- 2191-0278. ; 26:4, s. 517-523
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Tidskriftsartikel (refereegranskat)abstract
- Aim: Physical conditioning of youth has always been a controversial topic as it raises ethical, physiological, and medical issues. Current recommendations and guidelines suggest that strength training is a relatively safe and worthwhile method in conditioning youth. This, however, requires well-informed coaches who follow age-appropriate strength training recommendations and guidelines, compiles well-designed strength training programs, and provides qualified supervision and instructions. The purpose of this study was to investigate coaches’ awareness of current recommendations and guidelines regarding strength training for youth.Method: A total of 39 football (US: soccer) coaches (34 males and 5 females) training boys in age groups 8–12 years were included in this study. Data were collected using an attitude statement questionnaire, and the assertions were based upon current recommendations and guidelines.Results: The results revealed significant differences among coaches in terms of knowledge of important aspects of strength training for youth.Conclusions: The results suggested that coaches in the present study were not aware of the latest recommendations and guidelines regarding strength training for youth.
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| 5. |
- Fröberg, Andreas, 1985, et al.
(författare)
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Ledare tveksamma till styrketräningsråd för barn
- 2011
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Ingår i: Svensk Idrottsforskning : Organ för Centrum för Idrottsforskning. - Stockholm : Centrum för idrottsforskning (CIF). - 1103-4629. ; :4, s. 47-50
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 6. |
- Hebert-Losier, K., et al.
(författare)
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Updated reliability and normative values for the standing heel-rise test in healthy adults
- 2017
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Ingår i: Physiotherapy. - : Elsevier BV. - 0031-9406 .- 1873-1465. ; 103:4, s. 446-452
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Tidskriftsartikel (refereegranskat)abstract
- Objectives The heel-rise test is used to assess the strength and endurance of the plantar flexors in everyday clinical practice. However, several factors may affect outcomes, including sex, age, body mass index and activity level. The aims of this study were to revisit the reliability and normative values of this test, and establish normative equations accounting for several factors. Interventions Subjects performed single-legged heel rises to fatigue, standing on a 10 degrees incline, once on each leg. A subset of subjects (n = 32) repeated the test 1 week later. Reliability was quantified using intraclass (ICC) correlation coefficients and BlandAltman plots {mean difference [95% limits of agreement (LOA)]}, whereas the impact of sex, age, body mass index and activity level on the number of heel rises was determined using non-parametric regression models. Results The test showed excellent reliability (ICC = 1.0 right leg, 1.0 left leg), with mean between-day differences in the total number of heel-rise repetitions of 0.2 (95% LOA -6.2 to 6.5) and 0.1 (95% LOA -6.1 to 6.2) for right and left legs, respectively. Overall, males completed more repetitions than females (median 24 vs 21). However, older females (age >60 years) outperformed older males. According to the model, younger males with higher activity levels can complete the most heel rises. Conclusions The heel-rise test is highly reliable. The regression models herein can be employed by clinicians to evaluate the outcomes of heel-rise tests of individuals against a comparable normative population.
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| 7. |
- Johansson, Anette, et al.
(författare)
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Prevalence of shoulder pain in Swedish flatwater kayakers and its relation to range of motion and scapula stability of the shoulder joint
- 2016
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Ingår i: Journal of Sports Sciences. - : Informa UK Limited. - 0264-0414 .- 1466-447X. ; 34:10, s. 951-958
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Tidskriftsartikel (refereegranskat)abstract
- Few studies have investigated the incidence of injuries in kayakers. The aim was to study the prevalence of shoulder pain in competitive flatwater kayakers and to evaluate any differences in range of motion or scapula stability of the shoulder joint among kayakers with or without the history of shoulder pain. Thirty-one kayakers were participated in the study, and a questionnaire including background data was used. Shoulder range of motion was measured with a goniometer, and the participants were observed for scapula dyskinesis in flexion and abduction. Of the participating kayakers, 54.8% (n=17) had experienced shoulder pain. Kayakers who had experienced shoulder pain showed a significantly lower degree of internal rotational range of motion versus kayakers with no reported shoulder pain, with a mean degree of internal rotation in the right shoulder 49.3 vs 60.0 (P=0.017) and the left shoulder 51.9 vs 66.0 (P=0.000). Kayakers who had experienced shoulder pain were also observed with a scapular dyskinesis (n=15 of 17 kayakers) to a significantly higher degree (P=0.001) than kayakers with no reported shoulder pain. Findings suggest that screening for scapular dyskinesis and testing for rotational range of motion in the shoulder joint is essential in order to treat and maybe prevent shoulder pain in kayakers.
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| 8. |
- Kahlin, Yvonne, et al.
(författare)
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Physical self-esteem and personality traits in Swedish physically inactive female high school students : an intervention study
- 2016
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Ingår i: International Journal of Adolescent Medicine and Health. - : Walter de Gruyter GmbH. - 0334-0139 .- 2191-0278. ; 28:4, s. 363-372
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Physical activity provides fundamental health benefits and plays a positive role in physical well-being. The aim of this present study was to investigate whether a 6-month physical activity program could influence physical self-esteem and frequency of physical activity in physically inactive female high school students in short- and long-term periods and whether personality traits were related to physical activity behaviour and compliance with the program. METHODS: The study was a cluster-randomised controlled intervention study including 104 physically inactive female high school students aged 16-19 years, 60 females in an intervention group and 44 females in a control group. The intervention group exercised at sport centres at least once per week during a 6-month period. Questionnaires were used for evaluation. RESULTS: At a 6-month follow up, the intervention group improved physical self-perception in all subdomains and significantly improved physical condition, physical self-worth and self-related health compared to the control group. At 1-year follow up, 25 females out of 53 females were still physically active, and all ratings remained almost the same as at the 6-month follow up. There were no particular personality traits that were dominant in the groups. CONCLUSION: A 6-month physical activity program can positively influence physical self-esteem and the frequency of physical activity, both from a short- and long-term perspective.
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| 9. |
- Pagels, Peter, et al.
(författare)
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Influence of moderate, daily,physical activity upon body composition and blood lipid profile in swedish adults
- 2012
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Ingår i: Journal of Physical Activity and Health. - 1543-3080 .- 1543-5474. ; 9, s. 867-874
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Tidskriftsartikel (refereegranskat)abstract
- Background: Health organizations suggest that adults ought to engage in at least 30 minutes of moderate-intensity daily physical activity. This study investigated the effects of a 30-minute single daily bout of brisk walking upon risk factors for CHD with blood lipid profile in particular. Methods: Thirty-three (25-45 y) adults, were randomly assigned into an exercise group (EG) (n=16, (9w) and a control group (CG) (n=17 (6w). The EG walked briskly 30 minutes daily during the 3 weeks test period. Compliance/adherence was maximal throughout the 3-week intervention due to stringent daily monitoring. Results: The EG showed a significant decrease in concentrations of low density lipoprotein cholesterol (LDL-C) and total cholesterol (TC) during the intervention period. A significant inverse correlation between Δ energy expenditure/day and Δ LDL-C (r = -0.39, P<0.05) and an improvement in weight and BMI in the EG was found. Average steps during 30 minutes brisk walking bout was 3669 steps/bout generating a mean energy expenditure of 191 kcal/bout. Conclusions: The most unique findings were that daily single bouts of moderate-intensity physical activity for 30 minutes, during 3 weeks, induced favourable effects upon body weight, BMI and blood concentration of LDL-C and TC in healthy adults.
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| 10. |
- Raustorp, Anders, 1958, et al.
(författare)
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Physical self-esteem, a five year follow-up study on Swedish adolescents.
- 2009
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Ingår i: International journal of adolescent medicine and health. - : De Gruyter. - 0334-0139 .- 2191-0278. ; 21:4, s. 497-507
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Tidskriftsartikel (refereegranskat)abstract
- This study describes the levels and inter-correlations of physical self-esteem, physical activity, body mass index (BMI), and body fat and, in addition, distinctive of individuals with high vs. low physical self-worth in a longitudinal design during adolescence.
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