摘要
目的通过对竞技健美操B组水平支撑类动作的生物力学实验研究,确定完成动作的技术和主要肌肉群活动变化的特征。方法用摄像和肌电(EMG)测试手段对优秀男子竞技健美操运动员完成动作和主要的肌肉进行同步测量,获得动作的图像与肌肉的肌电(EMG)变化。结果水平支撑的肩关节角度大于分腿水平支撑的肩关节角度;分腿水平接俯卧撑人体重心下降最低点时,王某的肩、肘关节的角度小于刘某和唐某;肌肉的激活顺序分别是肱二头肌、肱三头肌、三角肌、竖脊肌和臀大肌。肱二头肌的IEMG值显著大于其他肌肉(P<0.01)。结论动作中应合理地控制肩关节的角度。重心的垂直投影应落在支撑面内或尽量靠近支撑面。肱二头肌在动作中发挥着重要作用,同时应增强肢体左侧肌群的力量训练。
Objective： By biomechanical experimentation research of the horizontal bracing difficult motion in B group of sports aerobics, the study made sure the technique and variation characteristics of muscles in the movement performance. Methods： Six elite male sports aerobics players joined test voluntarily. Video and EMG synchronized measurement were used to get their movement images and muscles EMG. Results ： The joint angles of shoulder and elbow in horizontal support were larger then theirs in horizontal divided legs support. In horizontal divided legs connect to push - up, the joint angles of shoulder and elbow of WANG were less then LIU＇ s and TONG＇ s when the lowest time of center gravity of body. Activation sequence of muscles was biceps, triceps, deltoid, vertical spinal muscular and gluteus maximums in proper order. IEMG of biceps was lager then others significantly （P 〈 0.01 ）. Conclusions： the joint angles of shoulder and hip must be controlled reasonably in definite range, and the vertical projection of the centre gravity of body must land in supporting plane or near it as much as possible. Biceps was played a very important part in balance. Meanwhile, the muscles strength of left limbs must be exercised in particular.
出处
《西安体育学院学报》
CSSCI
北大核心
2010年第6期716-721,共6页
Journal of Xi'an Physical Education University
基金
2008年陕西省体育局体育科研课题(08407)
