Walshe A D, Wilson G J, Murphy A J
Centre for Exercise Science and Sports Management, Southern Cross University, Lismore, N.S.W., Australia.
Eur J Appl Physiol Occup Physiol. 1996;73(3-4):332-9. doi: 10.1007/BF02425495.
The aim of this study was to investigate the validity and reliability of an in vivo test of lower body musculotendinous stiffness. Male subjects (n = 23) with at least 12 months of weight training experience performed a series of quasi-static muscular actions in a supine leg press position during which a brief perturbation was applied. The resulting damped oscillations enabled each subject's maximal musculotendinous stiffness for the lower body musculature to be estimated. To assess the individual's capacity to benefit from active stretch, subjects also performed both a static jump and a countermovement jump. Statistical analysis revealed no significant different between day 1 and day 2 stiffness values (P < 0.01), an interday reliability of r = 0.94 and a coefficient of variance of 8%. It was further demonstrated that maximal stiffness was significantly correlated to both isometric and concentric rate of force development (r = 0.50 and r = 0.54, respectively), and inversely related to the percentage difference between vertical jumps with and without prior stretch (r = -0.54). Such results tend to suggest that the test is valid and are discussed with reference to the restitution of elastic strain energy, muscle potentiation and the interaction effects of elastic recoil on dynamic muscular function. It was concluded that the assessment of stiffness of the lower body using the oscillation technique is a valid and reliable in vivo measure of musculotendinous stiffness.
本研究的目的是调查一项下肢肌肉肌腱僵硬度体内测试的有效性和可靠性。有至少12个月重量训练经验的男性受试者（n = 23）在仰卧腿举姿势下进行了一系列准静态肌肉动作，在此期间施加了短暂的扰动。由此产生的阻尼振荡使得能够估计每个受试者下肢肌肉组织的最大肌肉肌腱僵硬度。为了评估个体从主动拉伸中获益的能力，受试者还进行了立定跳远和纵跳。统计分析显示第1天和第2天的僵硬度值之间无显著差异（P < 0.01），日间可靠性r = 0.94，变异系数为8%。进一步证明，最大僵硬度与等长和向心力量发展速率均显著相关（分别为r = 0.50和r = 0.54），并且与有和没有预先拉伸的垂直跳跃之间的百分比差异呈负相关（r = -0.54）。这些结果倾向于表明该测试是有效的，并参考弹性应变能的恢复、肌肉增强以及弹性回缩对动态肌肉功能的相互作用效应进行了讨论。得出的结论是，使用振荡技术评估下肢僵硬度是一种有效且可靠的肌肉肌腱僵硬度体内测量方法。
