Laboratorio di Anatomia Funzionale dell'Apparato Locomotore, Dipartimento di Scienze Biomediche per la Salute, Facoltà di Medicina e Chirurgia, Università degli Studi di Milano, Milan, Italy.
J Electromyogr Kinesiol. 2013 Oct;23(5):1097-105. doi: 10.1016/j.jelekin.2013.04.013. Epub 2013 May 21.
Using an optoelectronic motion capture system, we quantitatively assessed the arrangement of body segments and the displacement of the horizontal projection of the center of mass (CM) in seven skaters performing off-ice back spins on a rotating device (spinner). The position of the CM at the beginning of the spins was not a determining factor, but its rapid stabilization towards the center of the spinner, together with the achievement of a stable arrangement of trunk and limbs, was crucial to get the dynamic equilibrium, necessary for a lasting performance. At full spinning, however, there was an indicative variety of individual body postures. A final deceleration, associable with the loss of body equilibrium, was detected in the last spin of most of skaters. In conclusion, the current investigation demonstrated that the off-ice execution of back spin, a critical movement of ice skating, can be measured in laboratory, thus providing quantitative information to both the skaters and the coaches. The analysis is not invasive, and it may be proposed also for longitudinal evaluations of skating and postural training.
使用光电运动捕捉系统，我们定量评估了 7 名滑冰运动员在旋转装置（ spinner）上进行离冰后外旋时身体各部分的排列和质心（CM）水平投影的位移。旋转开始时 CM 的位置不是决定因素，但 CM 迅速向 spinner 中心稳定，以及实现躯干和四肢的稳定排列，对于获得持续表现所需的动态平衡至关重要。然而，在全速旋转时，个体的身体姿势存在明显的差异。在大多数滑冰运动员的最后一次旋转中，都检测到了最后减速，这与身体平衡的丧失有关。总之，目前的研究表明，冰上滑冰的关键动作——离冰后外旋，可以在实验室中进行测量，从而为运动员和教练提供定量信息。该分析是非侵入性的，也可以用于滑冰和姿势训练的纵向评估。
