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首页> 外文期刊>International journal of sports medicine >Indicators of Sarcopenia: Sex Differences in Competitive Runners Prior to Peak Muscle Mass
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Indicators of Sarcopenia: Sex Differences in Competitive Runners Prior to Peak Muscle Mass

机译：SARCOPENIA指标：在肌肉质量峰值之前的竞争主流的性差异

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Strength, muscle mass, and muscle quality have been observed to be compromised in low body-mass index individuals such as competitive runners, increasing their risk for sarcopenia. The purpose was to compare indices of sarcopenia in young runners to age, height, body-mass, and body-mass index-matched non-runners. Handgrip strength and arm composition from dual-energy x-ray absorptiometry (baseline-T1, T2=5.3 +/- 1.4, T3=11.5 +/- 0.7 months later) were assessed in 40 non-runners and 40 runners (19.3 +/- 0.7 vs. 19.2 +/- 1.1 years, 170.7 +/- 10.3 vs. 171.1 +/- 9.1 cm, 60.2 +/- 7.4 vs. 60.2 +/- 7.9 kg, 20.6 +/- 0.9 vs. 20.5 +/- 1.5 kgm (-2) ). The unitless variable of muscle quality, was defined as the sum of right and left maximal handgrip (in kg) divided by the sum of bone-free lean mass of both arms (in kg). Female runners displayed the highest muscle quality (T1=15.3 +/- 1.7; T3=15.7 +/- 2.0) compared to male runners (T1=13.7 +/- 1.4, p 1.6, p 1.8, p= 0.001; T3=13.2 +/- 1.6, p 2.5, p= 0.154; T3=15.1 +/- 2.2, p= 0.124) showed higher muscle quality than male non-runners. Higher muscle quality in low-body-mass index females persists over one-year during young-adulthood and while running contributes to whole-body muscle mass accrual, it does not appear to be significantly associated with improvements in the most commonly used upper-body diagnostic indicator of sarcopenia.
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