摘要
采用遥测肌电测试并结合影像解析,对我国优秀男子铅球运动员张竣旋转推铅球单支撑阶段的主要用力肌肉及其用力顺序、用力范围和主要用力肌肉之间的协调关系等问题进行了研究。研究结果表明,张竣单支撑阶段主要发力肌肉是左腿起支撑作用的肌肉(左腿股外侧肌和左腿腓肠肌)和维持身体姿势的肌肉(右侧背阔肌和右腿股二头肌);主要发力肌肉的用力顺序(左腿腓肠肌内侧→左腿股外侧肌→右腿股二头肌→右侧背阔肌中部)是按照由下往上、由左至右进行的;张竣单支撑阶段主要肌肉的用力范围(即肌肉横跨关节的角度变化值):肩髋夹角为26.3°～52.1°、左髋角为116.7°～168.7°、左腿膝关节角度为120.7°～156.3°、右膝角为79.2°～172.7°、右髋角为112.5°～143.5°;张竣在单支撑阶段右腿肌肉用力的协调性不好,主动肌(右腿股内侧肌)发力时,拮抗肌(右腿股二头肌)没有适时放松,影响了其肌肉做功的整体效果。
Telemetry sEMG and image analysis were used to investigate an elite male shot-putter,ZHANG Jun during one-leg supporting and body rotating phase. The dominant muscles exerting force and their coordination, the order and scope of exertion were measured and evaluated in the study. The results were as follows： During one-leg supporting and body rotating phase, the shot-putter＇ s exerting muscles were vastus lateralis and gastrocnemius within left leg, and the right latissimus dorsi and biceps femoris within right leg. The exerting order of muscles was from bottom to top and from left to right （medial gastrocnemius within left leg→ vastus lateralis within left leg→biceps femoris within right leg→the central section of right latissimus dorsi）. Exerting scope of the major muscle force（angle changes of muscles of the crossjoint） ： 26. 3°-52. 1° shoulder-hip angle, 116. 7°-168. 7° left hip angle, 120. 7°- 156.3° left knee angle, 79.2°-172.7° right knee angle,and 112.5°-143.5° right hip angle. The shot-putter showed a worse muscle coordination within right leg during one-leg supporting phase,the antagonist muscle （right biceps femoris） was not relaxed exactly when the active muscle （right vastus medialis muscle） was making force, which reduced the overall effects of muscle working.
出处
《体育科学》
CSSCI
北大核心
2010年第1期44-50,共7页
China Sport Science
基金
上海市体育科研攻关与科技服务课题(08JT030)
关键词
表面肌电
旋转推铅球
男子
单支撑
肌肉用力特征
surface electromyography（sEMG）
body-rotating shot put
man
one-leg supporting
characteristics of muscle force
