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KINEMATIC STUDY FOR ENHANCEMENT OF TECHNIQUE IN SKI JUMP

提高跳台滑雪技术的运动学研究

基本信息

批准号：
06680128
负责人：
SASAKI Tsutomu
金额：
$ 1.15万
依托单位：
HOKUSEIGAKUEN WOMEN'S JUNIOR COLLEGE
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06680128/
关键词：
SKI JUMPING JOINT POWER EMG REACTION FORCE VIDEO ANALYSIS SEGMENT MODEL JOINT ENERGY

项目摘要

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

使用视频分析和 EMG 分析来表征世界级 umpers 的起飞运动。跳跃技术按关节力量的产生分为三类。通过指数回归分析来分析关节力量和肌肉活动之间的关系。这些研究结果如下： 1．肌肉活动与关节动力的关系肌肉在关节发电中发挥作用。关节力量与髋部和膝部肌肉的rEMG之间存在指数关系。关节肌肉中产生的电压越大表明关节力量增加。由此可见，需要更快的肌肉收缩才能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产生者。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。在跳跃动作中，当单个关节肌肉产生最大的电压时，关节产生最大的力量，但有一定的滞后时间。2．起飞技术的分类本研究基于对联合动力产生模式的分析，阐明了三种重要的跳台滑雪技术。三种技术被命名为1)相移发电技术、2)相移和腿部旋转技术、以及3)近距离发电技术。髋关节和膝关节在每种跳跃技术中产生力量和力量方面发挥着重要作用。发电方式对于提高每个跳远运动员的技能非常重要。每种技术的特点如下：1）相移发电技术中各关节的发电是按规则顺序进行的。2）相移腿部旋转技术的特点是腿部向前旋转运动，髋关节和膝关节发电模式的相位共振。3）近距离发电技术中膝关节和髋关节的发电模式没有相位共振。较少的