Strength and muscle mass loss with aging process. Age and strength loss.
Strength and muscle mass loss with aging process. Age and strength loss.
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DOI：
10.32098/mltj.04.2013.17
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发表时间：
2019-01
期刊：
影响因子：
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通讯作者：
K. Keller;M. Engelhardt
中科院分区：
文献类型：
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作者：
K. Keller;M. Engelhardt
背景：衰老过程与肌肉质量和力量的变化有关，30岁后肌肉力量下降。这项研究的目的是调查肌肉质量和力量的这些变化。患者和方法本研究将26名参与者再分为两组。第1组包括年龄40岁的参与者（n=12）。我们评估了人体测量学、活动范围、腿围和膝关节的等长强度值。结果除了可比的人体测量值外，组1的周长和强度均高于组2。右腿的上肢周长（膝关节间隙以上20 cm）有明显的趋势(中位数：54.45 cm(1（第1）四分位数：49.35/3（第3）四分位数：57.78)vs 49.80 cm (49.50/50.75), p=0.0526)，左腿的周长显著增大54.30 cm （49.28/58.13) vs 49.50 cm (48.00/52.53), p=0.0356）。在60°膝关节屈曲时，组1右侧(729.88N (561.47/862.13) vs 456.92N（304.67/560.12）和左腿(702.49N （581.36/983.87) vs 528.49N（332.95/648.58）的等长强度显著高于组2，p=0.00448）。结论衰老过程导致明显的肌肉量和力量损失。肌肉力量比40岁的人下降16.6%到40.9%。
BACKGROUND aging process is associated with changes in muscle mass and strength with decline of muscle strength after the 30(th) life year. The aim of this study was to investigate these changes in muscle mass and strength. PATIENTS & METHODS for this analysis 26 participants were subdivided in two groups. Group 1 comprises participants aged 40 years (n=12). We assessed anthropometrics, range of motions, leg circumferences and isometric strength values of the knee joints. RESULTS besides comparable anthropometrics, circumferences and strength were higher in group 1 than in group 2. Circumference of upper leg (20 cm above knee articular space) showed for right leg a trend to a significant (median: 54.45 cm (1(st) quartile: 49.35/3(rd) quartile: 57.78) vs 49.80 cm (49.50/50.75), p=0.0526) and for left leg a significant 54.30 cm (49.28/58.13) vs 49.50 cm (48.00/52.53), p=0.0356) larger circumference in group 1. Isometric strength was in 60° knee flexion significantly higher in group 1 than in group 2 for right (729.88N (561.47/862.13) vs 456.92N (304.67/560.12), p=0.00448) and left leg (702.49N (581.36/983.87) vs 528.49N (332.95/648.58), p=0.0234). CONCLUSIONS aging process leads to distinct muscle mass and strength loss. Muscle strength declines from people aged 40 years between 16.6% and 40.9%.