竞技健美操是一项较为年轻的体育运动项目，自1994年5月健美操项目正式进入国际体联以来，其发展历程才短短20几年。随着时代的发展和进步，竞技健美操以自身的魅力和特点风靡全球。竞技健美操作为“技能类表现难美项群”的新兴项目，具备该项群“难、美、新、稳”的本质特征。其中，难度动作是竞技健美操成套动作的价值基础，2013年国际体操联合会（FIG）颁布新规则，将旋子类列为竞技健美操C组跳与跃类难度动作。本研究选取C组旋子类动作中的C916旋子转体360°难度动作进行运动学和肌电参数的研究。本研究以国家健美操队现役队员作为研究对象，对国家健美操队训练场地用PEAK三维框架进行标定，现场采用两台JVC980数码摄像机，从侧面和正面拍摄C916旋子转体360°难度动作和C914旋子难度动作的整个过程，分析两个动作的运动学参数和肌电数据。采用美国Ariel录像解析系统进行解析，同时使用Noraxon表面肌电测试系统同步记录动作完成过程中的肌肉放电量，使用SPSS20.0等统计软件对所得原始数据进行整理和统计计算。按照竞技健美操技术规则，将本研究对象划分为起跳、腾空、落地三个阶段，对C916旋子转体360°难度动作三个阶段的时间点和时间段分析，得出成功动作每个阶段的运动时间、旋转角度和旋转方式；对完成动作的解析得出成功动作三个阶段质心高度、质心速度、腾空高度等数据；分析三个阶段髋、膝、踝的缓冲角度，得出起跳、腾空、落地三阶段下肢关节的运动形式，结合手臂分开角度和分腿角度的变化，获取身体各个环节的数据参数，帮助健美操运动员掌握相应的技术动作；通过对C916旋子转体360°难度动作的三个阶段8块主要肌肉的放电量进行分析，得出左、右侧不同肌肉放电量的差异，得出每个阶段的肌肉激活情况，揭示C916旋子转体360°难度动作的运动规律，以求为运动实践服务。 研究结论如下：C916旋子转体360°难度动作的起跳阶段，运动员髋绕矢状轴旋转90°；起跳阶段所用时间为0.48±0.09s，三个阶段中起跳阶段用时最长；起跳过程中左侧股直肌和右侧腓肠肌iEMG值较大；C916旋子转体360°难度动作的起跳垂直速度为2.97±0.21m/s，起跳角度为68±1.3°；运动员质心最大合速度为3.18±0.26m/s，质心最大合速度出现在起跳阶段。C916旋子转体360°难度动作腾空阶段，运动员髋在绕矢状轴旋转90°的同时，绕垂直轴旋转360°；运动员腾空阶段所用时间为0.28±0.08s，三个阶段中腾空阶段用时最短；运动员要完成C916旋子转体360°难度动作需要较高的腾空高度，过程中运动员的起始阶段质心高度为0.74±0.05m，腾空高度为0.44±0.06m，最高质心高度为1.18±0.06m。C916旋子转体360°难度动作落地阶段，运动员髋绕矢状轴转180°，落地阶段所用时间为0.31±0.14s。落地阶段末期，运动员在完成矢状轴和垂直轴的旋转后，躯干迅速抬起，两臂收拢至躯干两侧，为连接下一个难度动作做好准备。

Sports Aerobics is a relatively young sports discipline. It has been only more than 20 years since sports aerobics became an official discipline of the International Federation of Gymnastics. With the development of the times, sports aerobics became popular all over the world by its own charm. As a new member of the “discipline group performing difficulty and beauty by skill”, sports aerobics has the essential characteristics of the group: difficult, beautiful, new and stable.Difficulty movements are the basic value of sports aerobics. In the new rules issued by FIG in 2013, spin was listed in group C difficulty movements, which including jumping and jumping. We choose one of the movements C916, which means spinning 360°, to do research on kinesiology and myoelectricity parameters. Our research objects are players coming from national sports aerobics team. We calibrated the training floor with PEAK three-dimensional framework. We used two JVC980 digital cameras to film the C916 and C914 movements from side view and frontage and then made comparative analysis on kinesiology parameters and myoelectricity data of the successful movements failed movements.Using the American Ariel video analysis system and the Noraxon surface myoelectricity testing system at the same time, we recorded the discharge magnitude of muscles during the process of each movement. Then we sorted and calculated the original data by SPSS20.0 and other statistic software.According to the acrobatic gymnastics technical rules, we split the C916 and C914 movement into three processes: jumping, hanging and landing. Then we analyzed the movement C916 by different time point and time period of the three process, getting the moving time, spinning angle and spinning way of each successful movement. We analyzed and got data of height of center of mass, speed of center of mass and height of hanging during the three process of each successful movement. We analyzed the buffer angle and amplitude of hip, knee and ankle during each process and found out the moving way of lower limb joints. Along with the changes of spread angle of arms and legs, we got data of the whole body and helped players to master the technical movements. According to the analysis of discharge magnitude of eight main muscles during the process of C916 movements, we found out the difference on discharge magnitude between muscles on left and right side. We also found out the state of muscular power during each process and revealed the moving law C916 movement, which would provide benefits for sports practice.Conclusions: During the jumping process of the C916 spinning 360°difficulty movement, the player’s hip spun 90°around the sagittal axis. It took 0.48±0.09s in this process and it was the longest. The iEMG value of rectus femoris muscle on the left side and the gastrocnemius muscle on the right side were larger. The vertical speed was 2.97±0.21m/s during the jumping process and the jumping angle was 68±1.3°. The player got the max speed of the center of mass 3.18±0.26m/s in jumping process. During the hanging process of the C916 movement, the player’s hip spun 90°around the sagittal axis and spun 360°around the vertical axis at the same time. It took 0.28±0.08s in this process and it was the shortest. The player needed to get a relatively larger hanging height to finish the C916 movement. The player’s height of the center of mass was 0.74±0.05m and the hanging height was 0.44±0.06m at the beginning. The largest height of the center of mass was 1.18±0.06m during the process. In the landing process of the C916 movement, the player’s hip spun 180°around the sagittal axis and it took 0.31±0.14s to finish the process. At the end of the landing process, the player needed to raised up his or her torso quickly and folded arms close to body after finishing spinning around the sagittal and vertical axis, in order to make preparations for the next difficulty movement.