Winiarski Sławomir, Dubiel-Wuchowicz Karolina, Rutkowska-Kucharska Alicja
Biomechanics Division, University School of Physical Education in Wrocław, Poland.
Acta Bioeng Biomech. 2013;15(1):113-22.
Maintaining the body underwater in the so-called vertical position, where the body is inverted (head down) and balanced, is made possible by performing the support scull movement by the upper limbs. In synchronized swimming, the main criteria for judging this vertical position are maintaining body stability and the maximum height of the lower limbs one is able to extend out of the water. Therefore, it seems important to examine for any correlations between the symmetry of the upper limb's movement (sculling) and the ability to maintain balance of the body. The aim of this study was to use a dynamical asymmetry index (DAI) to assess the symmetry of the upper limb movements performed in synchronized swimming. The use of the dynamical asymmetry index is considered to be advantageous over the asymmetry coefficient, which is better known in literature on the subject and has been used by numerous authors, as it not only evaluates the magnitude of the asymmetry, but also indicates in which phases of movement asymmetry is the greatest or where it is the least significant.
通过上肢进行支撑划水动作，可使身体在所谓的垂直姿势下保持在水下，即身体倒置（头朝下）并保持平衡。在花样游泳中，判断这种垂直姿势的主要标准是保持身体稳定以及下肢能够伸出水面的最大高度。因此，研究上肢运动（划水）的对称性与身体平衡能力之间的任何相关性似乎很重要。本研究的目的是使用动态不对称指数（DAI）来评估花样游泳中上肢动作的对称性。与不对称系数相比，动态不对称指数的使用被认为具有优势，不对称系数在该主题的文献中更为人所知，并且已被众多作者使用，因为它不仅评估不对称的程度，还指出在运动的哪些阶段不对称最大或最不明显。
