Hamar Dušan
Faculty of Physical Education and Sports, Comenius University , Bratislava, Slovakia.
Eur J Transl Myol. 2015 Aug 25;25(4):215-9. doi: 10.4081/ejtm.2015.5281. eCollection 2015 Aug 24.
Paper deals with backgrounds and principles of universal linear motor driven leg press dynamometer and concept of serial stretch loading. The device is based on two computer controlled linear motors mounted to the horizontal rails. As the motors can keep either constant resistance force in selected position or velocity in both directions, the system allows simulation of any mode of muscle contraction. In addition, it also can generate defined serial stretch stimuli in a form of repeated force peaks. This is achieved by short segments of reversed velocity (in concentric phase) or acceleration (in eccentric phase). Such stimuli, generated at the rate of 10 Hz, have proven to be a more efficient means for the improvement of rate of the force development. This capability not only affects performance in many sports, but also plays a substantial role in prevention of falls and their consequences. Universal linear motor driven and computer controlled dynamometer with its unique feature to generate serial stretch stimuli seems to be an efficient and useful tool for enhancing strength training effects on neuromuscular function not only in athletes, but as well as in senior population and rehabilitation patients.
本文探讨了通用线性电机驱动的腿部压力测力计的背景和原理以及连续拉伸加载的概念。该设备基于安装在水平导轨上的两个计算机控制的线性电机。由于电机可以在选定位置保持恒定阻力或在两个方向上保持速度，该系统允许模拟任何肌肉收缩模式。此外，它还可以以重复力峰值的形式产生确定的连续拉伸刺激。这是通过反向速度（在向心阶段）或加速度（在离心阶段）的短段来实现的。以10赫兹的频率产生的这种刺激已被证明是提高力量发展速度的更有效手段。这种能力不仅影响许多运动项目的表现，而且在预防跌倒及其后果方面也起着重要作用。具有产生连续拉伸刺激这一独特功能的通用线性电机驱动和计算机控制的测力计似乎是一种有效且有用的工具，不仅可以增强对运动员神经肌肉功能的力量训练效果，对老年人群体和康复患者也是如此。
