表象训练对提高太极拳动作技术与防止消退的影响研究

文章以太原科技大学武术协会学生为研究对象,探讨表象训练对其太极拳动作技术水平提高和防止消退的影响研究。教学实验结果表明：实验组太极拳动作技术的掌握情况明显比对照组好。通过对两组学生太极拳动作技术的综合考试,实验组成绩优于对照组;对考核成绩进行T检验,两组考核结果具有显著性差异（P〈0.05）,教学效果显著。由此证明,表象训练可提高太极拳动作技术水平;并在暂时终止训练的消退时期,对防止已获得的动作技术水平消退的作用尤为突出。     

对国家男子足球队运动员比赛活动能力的研究

为正确评价我国国家男子足球队运动员比赛活动中体能情况及活动特征,为国家队提供准确的训练比赛信息,使用S IM I系统首次对我国国家队优秀运动员比赛跑动能力进行定量测量。通过国内、外对比研究,发现国内、外高水平运动员比赛跑动总距离存在一定的差异,各种跑速下的活动距离也不同,对此进行分析讨论。     

Measuring kinematic changes of the foot using a gyro sensor during intense running

Abstract

Gyro sensor has been used to measure foot pronation during running with reliable results in previous studies, and the signals were not affected by the vibration of heel strikes. The purpose of this study was to observe the kinematic changes of the foot during intense running using a 3-axis gyro sensor. Fifteen male participants (average age: 24.5 ± 1.7 years; mean height: 174.1 ± 3.3 cm; mean body weight: 71.0 ± 5.5 kg) were recruited in this study. Foot kinematic changes were observed in 30-min intense running protocols. The comparisons of the signals from gyro and motion analysis system were also performed to determine the accuracy of the gyro and showed positive results. In the main experiment, the ankle range of motion (ROM) in the frontal plane, measured using a motion system, showed a significant increase over time. Accordingly, peak angular velocity in the frontal plane also showed a significant increase. The correlation between ankle ROM and peak angular velocity in the frontal plane is significantly high (r = 0.975). Moreover, peak angular velocity in the frontal plane is also significantly correlated with both rate of perceived exertion (RPE) (r = 0.911) and heart rate (r = 0.960). This study concluded that an alarm system for foot kinematic changes related to running injuries can be built based on the peak angular velocity of the foot in the frontal plane.     

三维红外运动捕捉系统在田径技术诊断中的应用——以女子100m栏运动员王丽为例

利用三维红外运动捕捉系统对运动员王丽的跨栏动作进行影像捕捉、分析,揭示其现有技术动作的特点。研究发现王丽跨栏技术的特点：（1）跨栏步幅大,主要体现在起跨步步幅大,这可能对其腾空时间有影响;着地距离较短,比较合理。（2）起跨腿支撑时间和摆动腿支撑时间较短,说明其下肢肌肉较为有力,能够快速支撑其身体质量。（3）腾空时间较长。