Maximal unloaded shortening velocity of human skeletal muscle in vivo and its age-related changes

点击翻译按钮获取中文摘要

The purpose of this study was to develop a new method determining in vivo maximal unloaded shortening velocity (V_0), which represents an intrinsic property of human skeletal muscle, and to investigate its age-related changes. The results suggest that 1) V_0 can be measured in vivo, from the time lag between the onset of muscle contraction and the beginning of joint torque development, and 2) V_0 is well above the maximal shortening velocity estimated from the voluntary human movement. However, further methodological improvement especially in artifact removal is necessary for studying age-related changes in V_0.