The aim of the current study was to assess the feasibility and accuracy of real-time three-dimensional echocardiography(RT-3DE) in quantifying left ventricular volumes-time curve.
目的:探讨实时三维超声心动图(RT-3DE)定量评价左心室容量-时间曲线的可行性及准确性。
30 Cyclists are tested after 15-minute paddling and paddling/PNF stretching respectively,their maximum strength,strength-time curve and electromyography of leg muscles are collected and analyzed comparatively,in order to explore the effect of PNF stretching on cyclists\' muscle strength,strength-time curve parameter and EMG parameter.
以30名男性自行车运动员为受试对象,通过对其分别进行15 min蹬车和15 min蹬车/PNF拉伸两套不同方案的训练,训练后对其进行最大肌力、力量-时间曲线的主要指标以及下肢肌肉的肌电图测试与对比分析,以期探讨PNF牵伸练习对运动员肌肉力量、力量-时间曲线参数、EMG参数的影响。