KINEMATIC STUDY FOR ENHANCEMENT OF TECHNIQUE IN SKI JUMP

使用视频分析和肌电分析来描述世界级裁判员的起跳动作。根据关节发力的不同，将跳跃技术分为三大类。采用指数回归分析方法分析关节功率与肌肉活动的关系。主要研究成果如下：1.肌肉活动与关节动力的关系肌肉在关节发电中起作用。髋、膝关节肌肉的rEMG与关节功率呈指数关系。关节肌肉中产生的较大电压表明关节功率增加。因此，需要更快的肌肉收缩来产生更大的关节力量。臀大肌和股内侧肌是髋关节和膝关节的主要动力生产者。然而，对于与关节力量发展相关的训练，在rEMG显示的肌肉活动测量中应考虑弹性滞后。 ...更多信息 t电压时，关节产生的功率最大，但有一定的滞后时间.起跳技术的分类本文通过对跳台滑雪运动中关节发力模式的分析，阐明了三种重要的起跳技术。三种技术被命名为1）相移发电技术，2）相移和腿旋转技术，3）关闭发电技术。髋关节和膝关节在每个跳跃技术中起着产生动力和力量的重要作用。动力产生的方式对提高每个跳高运动员的技术水平很重要。每种技术的特征如下：1）在相移发电技术中，每个关节中的发电以规则的顺序发生。2）相移和腿旋转技术的特征在于腿的向前旋转运动和髋关节和膝关节中发电模式的相位谐振。3）在闭合发电技术中，膝关节和髋关节中的发电模式在没有相位谐振的情况下产生。少

The take-off motion in World class umpers were characterized using video analyzes and EMG analyzes. Jumping techniques were clasified three categories by joints power production. Relationship between joint power and muscle activities were analyzed by exponential regression analyzes. These research results are as follows :1. Relationship between muscle activity and joint powerThe muscles play a role in joint power generation. There was an exponential relation between joint power and the rEMG of the hip and knee muscles. Larger voltage production in a joint muscle indicates an increase in joint power. It follows that faster muscle contraction would be needed to generate larger joint power. The Gluteus maximus and Vastus medialis are major power producers in the hip and knee joints. However, for training related to joint power development, elastic lag should be considered in measurements of muscle activity shown by rEMG.During jump action, when the single joint muscles produced the larges … More t voltage, the joints produced the largest power with some lag time.2. Classification of the take-off techniquesThis study clarifies three important ski jumping techniques based on an analysis of the patterns of joint power production. Three techniques were named shuch as 1) the Phase Shift Power Generation Technique, 2) The Phase Shift and Leg Rotation Technique, and 3) the Close Power Generation Technique. The hip and knee joints play an important role for generating power and force in each jump technique. The manner of power generation is important for improving skills in each jumper. Characteristics in each technique are as follows :1) The power production in each joint takes place in a regular order in the Phase Shift Power Generation Technique.2) The Phase Shift and Leg Rotation Technique is characterized by forward rotational movement of the leg and phase resonance of the power generation pattern in the hip and knee joints.3) The patterns of power generation in the knee and hip joint are produced without phase resonance in the Close Power Generation Tecnique. Less