Bosco C, Komi P V
Acta Physiol Scand. 1979 Aug;106(4):467-72. doi: 10.1111/j.1748-1716.1979.tb06427.x.
Force-velocity and power-velocity curves in a vertical jump involving movements around several joints were derived from vertical ground reaction forces and knee angular velocities. The jumps were performed with weights from 10 to 160 kg added on the shoulders. The obtained curves from a semi-squatting static starting position resembled those reported for isolated muscles or single muscle groups. Vertical jumps were also performed in the conditions where the shortening of the leg extensors was preceded by prestretching of the active muscles either through a preparatory counter-movement or dropping down on the force-platform from the various heights ranging from 20 to 100 cm. Prestretching modified through a range of velocities the force-velocity and power-velocity curves by increasing both the ground reaction forces and the calculated mechanical power. Thus the results are similar to those reported in isolated muscles. In studies with isolated muscle preparation the nervous connections have not been intact and therefore it is suggested that increase in the performance of the skeletal muscles through prestretching, in the conditions of the present study, was attributed to the combined effects of the utilization of stored elastic energy and the reflex potentiation of muscle activation.
涉及多个关节运动的垂直跳跃中的力-速度和功率-速度曲线，是根据垂直地面反作用力和膝关节角速度得出的。跳跃时在肩部额外增加10至160千克的重量。从半蹲静态起始位置获得的曲线与针对孤立肌肉或单一肌肉群所报道的曲线相似。在腿部伸肌缩短之前，通过预备反向运动或从20至100厘米的不同高度落到测力平台上，对主动肌肉进行预拉伸的条件下，也进行了垂直跳跃。通过一系列速度进行的预拉伸，通过增加地面反作用力和计算得出的机械功率，改变了力-速度和功率-速度曲线。因此，结果与在孤立肌肉中所报道的结果相似。在对孤立肌肉制剂的研究中，神经连接并不完整，因此有人认为，在本研究条件下，通过预拉伸提高骨骼肌的性能，归因于储存弹性能量的利用和肌肉激活的反射增强的综合作用。
