Physical Education and Recreation, University of Alberta, Edmonton, Alberta, Canada.
J Sports Sci. 2012;30(11):1097-106. doi: 10.1080/02640414.2012.695078. Epub 2012 Jun 15.
This is the second study of the series, and its aim was to investigate the influence of using the suspended aid on circle kinetics. In addition to the kinematic data recorded for part one (Fujihara & Gervais, 2012), the pommel reaction forces and the force applied from the suspended aid (aid reaction force) were analysed in relation to the motion of a whole-body mass centre. The hip joint moment was also computed by combining all segments in the lower extremities into a single rigid segment. Generally, the use of the aid changed the magnitude of the mass-centre trajectory or horizontal pommel reaction forces but not their patterns. The results also showed that the net hip joint moment was altered during circles with the aid. In summary, a suspended aid can be used as a progression for a variety of goals because it allows gymnasts to practise circles which would not be possible without the aid. When a suspended aid is used, however, practitioners should be aware of the possible kinetic alteration caused by the external force from the aid.
这是该系列的第二项研究，旨在探讨使用悬带对圈操动力学的影响。除了记录的运动学数据（Fujihara & Gervais，2012），还分析了鞍马反作用力和悬带施加的力（辅助反作用力）与整个质心运动的关系。通过将下肢的所有部分组合成一个单一的刚性部分，还计算了髋关节力矩。一般来说，使用悬带改变了质心轨迹或水平鞍马反作用力的大小，但没有改变其模式。结果还表明，在使用悬带的情况下，髋关节的净力矩发生了变化。总之，悬带可以作为各种目标的进阶练习，因为它允许运动员练习在没有悬带的情况下无法完成的圈操。然而，当使用悬带时，练习者应该意识到辅助外力可能导致的动力学变化。
