中文摘要：

目的研究不同抓举重量下男子抓举技术动作的生物力学特征。方法利用8通道EMG测量系统、三维测力平衡系统和数码摄像机，对上海市举重队现役男子举重运动员在不同重量下抓举过程中的8块具有代表性的浅层骨骼肌的表面肌电、足底反力和抓举视频做同步采集。结果不同抓举重量下举重运动员的足底反力变化曲线趋势一致，基于足底反力曲线中的特征点对抓举技术动作阶段可划分为7个阶段，预备阶段、伸膝提铃阶段、引膝提铃阶段、发力阶段、惯性上升阶段、下降定铃阶段和起立阶段。抓举过程中肌群活动的时间顺序为：背阔肌、竖脊肌、肌直肌、三角肌、肱三头肌、胫骨前肌、肱二头肌和斜方肌。其中，斜方肌的积分肌电值最大，背阔肌的积分肌电值最小。随着抓举重量的增加，肱三头肌和三角肌的积分肌电值增加最大。结论为提高举重运动员抓举项目的比赛成绩，运动员应该重视斜方肌、肱三头肌和三角肌的训练。

英文摘要：

Objective To study the biomechanical characters of male weightlifter＇s squat snatch technique. Methods 8 Channel EMG System, 3D force measure system and digital video were adopted to collect sEMG of 8 representative skeletal muscles, plantar force and synchronized video during male weightlifter＇s squat snatch in different weights from Shanghai weightlifting team. Results The plantar force curves of weightlifter＇s squat snatch in different weights are consistent. The squat snatch technique can be divided into 7 phases based on characteristic curve patterns of plantar force. During squat snatch, the active order of skeletal muscles is M. latissimus dorsi, M. erector spinaeta, M. rectus femoris, M. deltoideus, M. triceps brachii, M. tibialis anterior, M. biceps brachii and M. trapezius. The integrated EMG value of M. trapezius is largest while that of M. latissimus dorsi is smallest. With increasing of barbell weight, the integrated EMG values of M. triceps brachii and M. deltoideus increase to it maximum. Conclusion Attention shall be paid to training weightlifter＇s M. trapezius, M. triceps brachii and M. deltoideus during squat snatch in order to improve the weight lifting performance.