Is muscle power output a key factor in the age-related decline in physical performance? A comparison of muscle cross section, chair-rising test and jumping power
Is muscle power output a key factor in the age-related decline in physical performance? A comparison of muscle cross section, chair-rising test and jumping power
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DOI：
10.1111/j.1475-097x.2004.00567.x
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发表时间：
2004-11-01
影响因子：
1.8
通讯作者：
Felsenberg, D
中科院分区：
文献类型：
--
作者：
Runge, M;Rittweger, J;Felsenberg, D
衰老损害了运动能力，并与福尔斯风险增加有关。一些证据表明，肌肉质量和性能的变化都是原因。然而，大多数研究并没有区分衰老、久坐和合并症的影响。本研究比较了不同年龄组体能自评者肌肉横截面积、力量和功率的年龄效应。共有169名女性和89名男性入组本研究，年龄在18至88岁之间，无任何影响肌肉骨骼系统的疾病、损伤或药物。通过计算机断层扫描评估小腿肌肉横截面积。肌肉力量和功率通过跳跃力学图进行评估。男性肌肉横截面与年龄无显著相关性。在对身高进行校正后，女性中的弱相关性消失了。然而，峰值力量和峰值功率与年龄密切相关。肌肉横截面或体重的校正进一步增加了这些相关系数，特别是对于特定于体重的峰值功率（女性r = 0.81，男性r = 0.86）。这里研究的非久坐人群在20岁至80岁之间减少了>50%，而肌肉横截面没有减少。这表明肌肉力量在衰老过程中起着至关重要的作用。作为反重力功率输出的测量，跳跃力学可能是椅子上升测试的一个有前途的扩展，已知椅子上升测试可以预测固定和福尔斯的风险。
Ageing compromises locomotor capacity and is associated with an increased risk of falls. Several lines of evidence indicate that both changes in muscle mass and performance are causative. Most studies, however, do not discern between effects of ageing, sedentarism and comorbidity. The present study compares the age effects in muscle cross section, force and power in physically competent self-selected subjects of different age groups. A total of 169 women and 89 men between 18 and 88 years, without any disease, impairment or medication affecting the musculoskeletal system were enrolled in this study. Calf muscle cross-sectional area was assessed by computed tomography. Muscle force and power were assessed by jumping mechanography. No significant correlation between muscle cross section and age was found in the men. A weak correlation in the women disappeared after correction for height. Close correlations with age, however, were found for peak force and peak power. Correction for muscle cross section or body weight further increased these correlation coefficients, particularly for peak power specific to body weight (r = 0.81 in women and r = 0.86 in men). The non-sedentarian population investigated here depicted a reduction of >50% between the age of 20 and 80 without a reduction in muscle cross section. This suggests a crucial role for muscular power in the ageing process. Possibly, the jumping mechanography as a measurement of anti-gravitational power output is a promising extension of the chair-rising test, known to be predictive for immobilization and the risk of falls.