CPR can triple survival rates but some people are reluctant to do it in part because they are unsure about the proper rhythm for chest compressions .

CPR可使患者的存活率提高 三 倍，但有些人在实施时犹豫不决，部分也是因为不知道正确的胸部按压 节奏。

Based on the study of speed and rhythm in each technical step of triple jump this paper aims at finding out a proper method of controlling speed and Rhythm in order to provide a more accurate and reliable theoretical basis for triple jump training .

通过对 三 级 跳远各个技术环节速度- 节奏的探讨，找出其正确的控制方法，以期为教练员和运动员训练提供更具准备 性和可靠性的理论依据。