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  • 1. den Hoed, M
    et al.
    Hesselink, M K C
    Westerterp, K R
    Skeletal muscle fiber-type distribution and habitual physical activity in daily life.2009In: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838, Vol. 19, no 3Article in journal (Refereed)
    Abstract [en]

    The capacity to perform physical activity largely depends on physical fitness. Muscle fiber-type distribution (Muscle(FTD)) is associated with physical fitness and may influence the capacity to perform physical activity. The purpose of this study was to determine whether habitual physical activity in daily life (PA(DL)) and Muscle(FTD) are related. Thirty-eight healthy non-athletes (31 women, 7 men) were recruited. PA(DL) was measured twice for 14 days using a tri-axial accelerometer for movement registration (Tracmor). From Tracmor output, the proportion of time subjects were physically active at low, moderate, and high intensities was determined (%Low, %Moderate, and %High, respectively). A total activity index (PA(index)) and sub-scores on work, leisure-time and sports were obtained using the Baecke questionnaire. Muscle(FTD) was determined using immuno-fluorescence against respective myosin heavy chain isoforms. No relationship was observed between PA(DL) and Muscle(FTD). %Low, %Moderate, and %High, as well as PA(index) and its sub-scores, were not related to Muscle(FTD) either. The time spent on sports was associated with the proportion of type I and II(X) fibers (P=0.06 and P<0.01, respectively). In conclusion, Muscle(FTD) probably cannot explain why some people are more prone to engaging in physical activities than others.

  • 2.
    Ekelund, Ulf
    et al.
    Unit for Preventive Nutrition, Department of Medical Nutrition, Karolinska Institutet, Stockholm; Department of Physical Education and Health, Örebro University, Sweden.
    Yngve, Agneta
    Unit for Preventive Nutrition, Department of Medical Nutrition, Karolinska Institutet, Stockholm.
    Sjöström, Michael
    Unit for Preventive Nutrition, Department of Medical Nutrition, Karolinska Institutet, Stockholm; Department of Physical Education and Health, Örebro University, Sweden.
    Total daily energy expenditure and patterns of physical activity in adolescents assessed by two different methods1999In: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838, Vol. 9, no 5, p. 257-264Article in journal (Refereed)
    Abstract [en]

    Minute-by-minute heart rate monitoring and an activity diary were used simultaneously during three days in 30 randomly selected adolescents (16 boys, 14 girls; mean age 15.0+/-1.0). Total daily energy expenditure (TDEE) and its components (energy expenditure during sleep, during rest and in physical activity) and times spent at different intensity levels (sedentary, light, moderate physical activity and vigorous physical activity) were compared. TDEE from heart rate monitoring averaged 10.9+/-2.7 MJ x d(-1) compared to 11.3+/-2.3 MJ x d(-1) from the activity diary (NS). The limits of agreement (mean+/-2 SD) were -3.54 MJ x d(-1) and 2.74 MJ x d(-1). There was no significant difference for any of the TDEE components between the methods (MANOVA). A significant method effect (P<0.001) was observed for time spent in sedentary and light physical activity (MANOVA). No significant difference was observed for time spent in moderate and vigorous physical activity. According to this, heart rate monitoring and activity diary are comparable for group assessment of TDEE and its components, and for estimating time spent in moderate and vigorous physical activity. The activity diary underestimated time spent in moderate and vigorous physical activity for inactive subjects and consequently overestimated highly active subjects.

  • 3.
    Farahmand, B
    et al.
    Karolinska institutet.
    Hållmarker, Ulf
    Mora sjukhus.
    Brobert, G. P.
    Ahlbom, A.
    Acute mortality during long-distance ski races (Vasaloppet)2007In: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838, Vol. 17, no 4, p. 356-361Article in journal (Refereed)
  • 4.
    Grevnerts, H. Tigerstrand
    et al.
    Rorelse Halsa, Primary Healthcare Rehabil, Linkoping, Sweden.;Linkoping Univ, Dept Med & Hlth Sci, Div Physiotherapy, Linkoping, Sweden..
    Silbernagel, K. Gravare
    Univ Delaware, Dept Phys Therapy, Newark, DE USA..
    Sonesson, S.
    Linkoping Univ, Dept Med & Hlth Sci, Div Physiotherapy, Linkoping, Sweden..
    Ardern, C.
    Linkoping Univ, Dept Med & Hlth Sci, Div Physiotherapy, Linkoping, Sweden.;Aspetar Orthopaed & Sports Med Hosp, Doha, Qatar..
    Österberg, A.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Medicinska och farmaceutiska vetenskapsområdet, centrumbildningar mm, Centrum för klinisk forskning i Sörmland (CKFD). Linkoping Univ, Dept Med & Hlth Sci, Div Physiotherapy, Linkoping, Sweden..
    Gauffin, H.
    Linkoping Univ, Dept Clin & Expt Med, Orthopaed Dept, Linkoping, Sweden..
    Kvist, J.
    Linkoping Univ, Dept Med & Hlth Sci, Div Physiotherapy, Linkoping, Sweden..
    Translation and testing of measurement properties of the Swedish version of the IKDC subjective knee form2017In: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838, Vol. 27, no 5, p. 554-562Article in journal (Refereed)
    Abstract [en]

    To translate to Swedish language and cross-culturally adapt the IKDC-SKF and to test the measurement properties of the Swedish version of IKDC-SKF in ACL-injured patients undergoing reconstruction surgery.The translation and cross-cultural adaption was performed according to guidelines. Seventy-six patients with an ACL injury filled out the IKDC-SKF and other questionnaires before ACL reconstruction and at 4, 6, and 12months after surgery. A total of 203 patients from the Swedish ACL Registry participated at 8months post-operative. Measurement properties were tested according to the COnsensus-based Standards for the selection of health Measurement INstruments (COSMIN) guidelines.The Swedish IKDC-SKF had high internal consistency (Cronbachs alpha=0.90) and test-retest reliability (ICC2,1=0.92, CI 95%: 0.81-0.97, P<.001). A single factor solution accounted for 46.1% of the variance in IKDC-SKF scores. Criterion validity was moderate to high. All ten predefined hypotheses for hypothesis testing were confirmed. The six hypotheses for responsiveness testing were confirmed. The effect size was 1.8, the standardized response mean was 1.9, the and minimal clinically important difference was 13.9 points.The Swedish version of the IKDC-SKF had good measurement properties and can be recommended for use in a population of ACL-deficient patients undergoing ACL reconstruction.

  • 5.
    Klavestrand, Johan
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences.
    Vingård, Eva
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences.
    The relationship between physical activity and health-related quality of life: a systematic review of current evidence2009In: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838, Vol. 19, no 3, p. 300-312Article, review/survey (Refereed)
    Abstract [en]

    The objective of this review was to update the relationship between physical activity (PA) and health-related quality of life (HRQL). A systematical search was performed in MEDLINE and PsychINFO between 2000 and 2007, for HRQL- and PA-related keywords in titles, abstracts, or indexing fields. From over 600 retrieved references, 35 citations were judged to require further evaluation. Finally, 10 studies were retained for data extraction and analysis; five were cross-sectional studies, four were cohort and randomized-controlled trails (RCT) studies, and one used a combined cross-sectional and longitudinal design. Cross-sectional studies showed a consistently positive association between self-reported PA and HRQL. The largest cross-sectional study reported an adjusted odds ratio of "having 14 or more unhealthy days" during the previous month to be 0.40 (95% confidence interval 0.36-0.45) for those meeting recommended levels of PA compared with inactive subjects. Cohort studies and RCT tended to show a positive effect of PA on HRQL, but similar to the cross-sectional studies, had methodological limitations. Cross-sectional data showed a consistently positive association between PA level and HRQL. Limited evidence from RCT and cohort studies precludes a definitive statement about the nature of this association.

  • 6. Larsson, Ingrid
    et al.
    Anderzén, Ingrid
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Public Health and Caring Sciences.
    Appraisal, coping, catecholamine excretion, and psychomotor performance during calm and stressful conditions1987In: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838Article in journal (Refereed)
  • 7.
    Ribom, Eva
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Orthopaedics.
    Ljunggren, Östen
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences.
    Piehl-Aulin, K.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences.
    Ljunghall, S.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences.
    Bratteby, Lars-Eric
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences.
    Samuelson, Gösta
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences.
    Mallmin, Hans
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Orthopaedics.
    Muscle strength correlates with total body bone mineral density in young women but not in men2004In: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838, Vol. 14, no 1, p. 24-9Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: Osteoporosis is a growing health problem. One of the proposed reasons for this is a more sedentary lifestyle. The aim of this study was to investigate the associations between muscle strength and total body bone mineral density (TBMD) in young adults at expected peak bone mass. METHODS: Sixty-four women and 61 men (total 125) 21 years of age were included. Handgrip strength, isokinetic knee-flexion and -extension muscle strength, TBMD, and body composition were measured. RESULTS: Univariate regression analyses showed that knee flexion and extension explained almost 30% of the variation in TBMD in women, whereas handgrip strength was not associated with TBMD. In men, no correlation between any measures of muscle strength and TBMD was evident. Stepwise regression analysis showed that knee-flexion and -extension muscle strength in women were associated with TBMD, R2=0.27. In men, lean body mass, fat mass, weight, and height were predictors for TBMD, R2=0.43, whereas muscle strength did not affect the prediction of TBMD. CONCLUSIONS: Muscle strength at weight-bearing sites is related to TBMD in women, whereas body composition is related to TBMD in men. The association of lower limb strength on TBMD only in young women indicates a gender difference.

  • 8.
    Robinson, Yohan
    et al.
    Charite´ – Campus Benjamin Franklin, Centrum fu¨r Unfallund Wiederherstellungschirurgie, Berlin.
    Kayser, Ralph
    Ertel, Wolfgang
    Heyde, Christoph E
    Traumatic cervical instability in martial arts2007In: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838, Vol. 17, no 1, p. 92-93Article in journal (Refereed)
    Abstract [en]

    Background: Severe injuries in martial arts are rare and only few spinal injuries have been reported so far.

    Objective: To sensitise for cervical spine instability even after low impact sports trauma.

    Case: A 27-years old male athlete tried to escape a headlock during a jujitsu fight and reported acute neck pain. Neurologically the patient remained intact. Conventional X-ray, CT and MRI revealed discoligamental instability at C6/7. Thus an anterior fusion at C6/7 was performed with excellent 2-years follow-up result.

    Conclusions: Only relatively little force is needed to disrupt cervical spinal ligaments if torsion is involved. Sports physicians need to recognise the discipline-related injury-patterns and martial arts-schools should re-evaluate their rules of safety concerning cervical spine-injuries.

  • 9. Thelin, N.
    et al.
    Holmberg, Sara
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Public Health and Caring Sciences, Family Medicine and Clinical Epidemiology.
    Thelin, Anders
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Public Health and Caring Sciences, Family Medicine and Clinical Epidemiology.
    Knee injuries account for the sports-related increased risk of knee osteoarthritis2006In: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838, Vol. 16, no 5, p. 329-333Article in journal (Refereed)
    Abstract [en]

    Increased risk of osteoarthritis has been found among athletes active in different kinds of sports. Knee injury is an established risk factor for knee osteoarthritis. In this population-based case–control study we investigated the risk of knee osteoarthritis with respect to sports activity and previous knee injuries. A total of 825 cases with x-ray-verified femorotibial osteoarthritis were identified at six hospitals in southern Sweden. The cases were matched (age, sex and residential area) with 825 controls from the general population. Mailed questionnaire data on sports activity for more than 1 year after the age of 16, knee injuries and confounding variables (weight, height, heredity, smoking and occupation) were collected and analyzed using logistic regression models. The response frequency was 89%. Among men knee osteoarthritis was related to soccer (odds ratio (OR) 1.6, 95% confidence interval (CI) 1.1–2.2), ice hockey (OR 1.9, 95% CI 1.2–3.0) and tennis (OR 2.0, 95% CI 1.1–3.8) but not to track and field sports, cross-country skiing, and orienteering. After adjustment for confounding variables soccer and ice hockey remained significantly related to knee osteoarthritis, but after adjustment for knee injuries no significant relation remained. The sports-related increased risk for knee osteoarthritis was explained by knee injuries.

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