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1·It is generally acknowledged that the isotonic exercise can result in cardiac dilatation and the isometric exercise can cause myocardial pachynsis.

已有的研究提示，一般认为等张运动导致心腔扩大，等长运动导致心肌肥厚，但在实际训练中，并不存在单纯的等张或等长训练。

2·Objective to provide a new method for recognizing isotonic or isometric exercise in the rehabilitation of lower residual limbs for the patients after amputation.

目的提出一种面向下肢截肢患者，可实现等长和等张训练的下肢残肢康复训练识别的新方法。