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肌肉力量强度随增龄而减退,这是由于肌肉质量(mass)的减少或萎缩。但是随着年老,肌肉横断面积的最大等长力(Force/CSA)也减退.但体型的不同是否肌力与 CSA 比值随增龄而下降,就必须了解CSA。作者用分离小动物的肌肉作实验,建立了肌力与 CSA 的比例关系,为了便于测量 CSA,减少活体中测量随意肌的最大肌力(简称 MVF)和 CSA 的误差,作者选定纤维呈平行排列的拇指内收肌进行一组年轻人和一组老年人 MVF 和 CSA 的对比。
Muscle strength diminishes with age, due to a reduction or contraction of muscle mass. However, with age, the maximum isokinetic force (Force / CSA) of the muscle cross-sectional area also diminishes, but CSA must be known as to whether the difference in size between muscle strength and CSA decreases with age. The authors used experiments to separate muscle from small animals and established the relationship between muscle strength and CSA. In order to facilitate the measurement of CSA and reduce the maximum muscle strength (abbreviated as MVF) and CSA errors in measuring voluntary muscle in vivo, the authors selected the fibers to be parallel Aligned thumb adductor muscle A comparison of MVF and CSA for a group of young people and a group of seniors.