离心力量训练对上肢快速力量的影响

(1)目的:探讨12周离心力量训练与非离心力量训练对上肢快速力量的影响。方法:以山东省邹平黄山中学30名男子田径队运动员为实验对象,利用MyoTest爆发力测试仪进行40%1RM卧推爆发力测试以及坐姿前推实心球测试;(2)结果:①与非离心力量训练组相比,离心力量训练组40%1RM卧推输出功率的增长具有显著性(P<0.05);②与非离心力量训练组相比,离心力量训练组40%1RM卧推爆发力力值的增长具有显著性(P<0.05);③与非离心力量训练组相比,离心力量训练组坐姿前推实心球出手速度的增长具有显著性(P<0.05);(3)结论:离心力量训练能够有效地提高上肢肌肉的快速力量(爆发力),且比传统非离心力量训练对于上肢肌肉快速力量(爆发力)的发展效果更好。

连续纵跳能力与100米成绩的相关性

关于100米成绩的影响因素有很多研究，但目前为止还都仅限于技术动作或能量代谢的单一因素研究，而没有将动作和能量代谢结合起来。采用不同重复次数的连续纵跳指标可以将动作与能量代谢这两方面因素相结合，分析其与100米成绩的相关性。使用myotest仪器可以便捷准确的评价连续纵跳能力。

A Comparison of 3D Methods for Identifying the Stance Phase in Treadmill Running for Both Rearfoot and Forefoot Runners

We compared six 3D methods, OptoGait, and Myotest Run for the determination of contact time for runners with different foot strike patterns. Twenty male participants were divided into two groups： the heel group, who attack the ground with the heel （n = 12）, and the toe group, who attack the ground with the middle/front of the foot （n = 8）. They performed trials at speeds of 8 km/h then 16 km/h. To detect foot strike, the use of peak velocity of 3D markers located on the heel, the fifth metatarsal, and the great toe provided the best results for both groups. To detect the toe off, the minimum vertical position of a 3D marker placed in line with the great toe gave the most satisfactory results for both groups. In this way, the values of contact time measured with the 3D methods are consistent. Values measured with OptoGait appear consistent too, while those of the Myotest Run underestimate the contact time for both speeds. 3D analysis provides interesting opportunities for calculation of contact time for both rearfoot and forefoot runners, using specific peak velocities to determine foot strike and marker displacement to determine toe off.

连续纵跳能力与100米成绩的相关性探究

采用不同重复次数的连续纵跳指标可以将动作与能量代谢这两方面因素相结合,分析其与100米成绩的相关性。使用myotest仪器可以便捷准确的评价连续纵跳能力。研究结果显示:连续纵跳5次与100米成绩的相关系数r=-0.706(P=0.023)。连续纵跳10次与100米成绩的相关系数r=-0.833(P=0.003)。说明连续纵跳能力与100米成绩之间高度相关。并且连续纵跳10次与100米成绩的相关程度要高于连续纵跳5次与100米成绩的相关程度。