Perrine J J, Edgerton V R
Med Sci Sports. 1978 Fall;10(3):159-66.
Various studies have indicated that human muscles in-vivo manifest a substantially similar, if not the identical force-velocity relationship established for isolated, maximally stimulated animal muscles. In the present study, fifteen healthy males and females, 18 to 38 years old and representing varied activity patterns from sedentary to athletic, performed maximal dynamic knee extensions on an isokinetic loading dynamometer. Maximal torque forces attained at a specific point in the range (30 degrees before full extension) and at seven loading velocities from 0 (isometric) to 288 degrees/sec were recorded. The maximum 30 degrees torques exhibited by the various subjects ranged from 29 to 245 Newton-meters. However, over the four lower test velocities (0, 48, 96 & 144 degrees/sec), all subjects exhibited less than a 15% deviation from their respective maximum 30 degrees torque values, which occurred most often at the 96 degree/sec test velocity. Maximal instantaneous power output at the 30 degree position ranged from 98 to 680 Watts. In all 15 subjects this was attained at and remained generally constant over the three highest test velocities (192 to 288 degrees/sec). A neural mechanism that restricts a muscle's maximal tension in-vivo is postulated as being responsible for the marked difference between the force-velocity relationship found for human muscles in-vivo and that exhibited by isolated animal muscles.
多项研究表明，人体肌肉在体内表现出一种基本相似（即便不是完全相同）的力-速度关系，这种关系是在对分离的、受到最大刺激的动物肌肉进行研究时确立的。在本研究中，15名年龄在18至38岁之间、代表从久坐不动到运动型等不同活动模式的健康男性和女性，在等动负荷测力计上进行了最大动态膝关节伸展运动。记录了在伸展范围特定点（完全伸展前30度）以及从0（等长）到288度/秒的七个负荷速度下所达到的最大扭矩力。不同受试者所表现出的最大30度扭矩范围为29至245牛顿米。然而，在四个较低测试速度（0、48、96和144度/秒）下，所有受试者与其各自的最大30度扭矩值的偏差均小于15%，这种偏差最常出现在96度/秒的测试速度下。在30度位置的最大瞬时功率输出范围为98至680瓦。在所有15名受试者中，这一输出在三个最高测试速度（192至288度/秒）下达到并总体保持恒定。一种在体内限制肌肉最大张力的神经机制被认为是造成人体肌肉在体内所发现的力-速度关系与分离的动物肌肉所表现出的力-速度关系之间显著差异的原因。
