标枪运动员投掷臂肩关节旋转肌力特性探讨

Exploration of Shoulder Rotation Characteristics in Athlete of Javelin

通过应用超声波动力学测量仪和CYBEX-6000等速仪器,分别对26名标枪运动员和22名自愿者肩关节内、外旋活动范围(range of motion,ROM)、内外旋肌力进行测量,以探讨标枪运动员肩关节旋转运动特征。结果表明:标枪运动员优势臂的外旋活动范围明显大于非优势臂,而其优势臂的内旋活动范围则显著小于非优势臂,优势臂的整个旋转活动范围也明显比非优势臂小;对照组的优势臂和非优势臂旋转活动范围无显著差异,测试还发现:标枪运动员肩关节存在内、外旋肌力不平衡,实验组优势臂内旋IR(210°/s)、IR(300°/s)相对锋力矩明显大于非优势臂(P<0.001),优势臂外旋ER(210°/s)、ER(300°/s)锋力矩与非优势臂相比,无明显差异(P>0.05),实验组优势臂外旋/内旋锋力矩比值(ER/IR)明显小于非优势臂。

Aim of this study was to assess the glenohumeral joint internal and external rotational range of motion using an ultrasound based kinematic measurement device, and to isokinetically measure concentric glenohumeral joint internal and external rotation strength, twenty- six male athlete of javelin were bilaterally measured for internal and external rotation at 90 degrees of shoulder abduction while avoiding scapulothoracic motion. The control group consisted of 22 volunteers not involved in overhead sports activities. The data showes：The dominant arm had a significantly grater range of external rotation than the non - dominant arm. while their internal rotation showed a significant deficit as compared to the non - dominant arm. The dominant arm total rotation range of motion was also significantly reduced in comparison to the non- dominant arm and to the controls. No significant difference was found between the dominant and non- dominant extremity in the control group. The data also showea a relative muscular imbalance between the internal and external rotators on the dominant arm of athlete of javelin