Desplantez A, Goubel F
Département de Génie Biologique, UMR CNRS 6600, Université de Technologie, BP 20529, 60205 Compiègne cedex, France.
J Biomech. 2002 Dec;35(12):1565-73. doi: 10.1016/s0021-9290(02)00190-2.
Isokinetic tests performed on human muscle in vivo during plantar flexion contractions lead to torque-angular velocity relationships usually fitted by Hill's equation expressed in angular terms. However, such tests can lead to discrepant results since they require maximal voluntary contractions performed in dynamic conditions. In the present study, another way to approach mechanical behaviour of a musculo-articular structure was used, i.e. sinusoidal oscillations during sub-maximal contractions. This led to the expression of (i). Bode diagrams allowing the determination of a damping coefficient (B(bode)); and (ii). a viscous parameter (B(sin)) using an adaptation of Hill's equation to sinusoidal oscillations. Then torque-angular velocity relationships were predicted from a model based on the interrelation between B(bode) and B(sin) and on the determination of optimal conditions of contraction. This offers the possibility of characterizing muscle dynamic properties by avoiding the use of isokinetic maximal contractions.
在跖屈收缩过程中对人体肌肉进行的等速测试会得出扭矩 - 角速度关系，这种关系通常由用角度表示的希尔方程拟合。然而，此类测试可能会导致结果不一致，因为它们需要在动态条件下进行最大自主收缩。在本研究中，采用了另一种方法来研究肌肉关节结构的力学行为，即在次最大收缩期间进行正弦振荡。这导致了以下结果：(i) 绘制伯德图以确定阻尼系数（B(bode)）；(ii) 使用对希尔方程进行正弦振荡适配的方法来确定粘性参数（B(sin)）。然后根据基于B(bode)和B(sin)之间的相互关系以及收缩最佳条件的确定所建立的模型来预测扭矩 - 角速度关系。这为通过避免使用等速最大收缩来表征肌肉动态特性提供了可能性。
