Sinsurin Komsak, Vachalathiti Roongtiwa, Jalayondeja Wattana, Limroongreungrat Weerawat
Faculty of Physical Therapy, Mahidol University, Nakhon Pathom 73170, Thailand.
College of Sports Science and Technology, Mahidol University, Nakhon Pathom 73170, Thailand.
Asian J Sports Med. 2013 Sep;4(3):195-200. doi: 10.5812/asjsm.34258. Epub 2013 May 5.
Excessive knee valgus during landing tasks is a contributing factor to knee injuries. Most studies have examined lower extremity biomechanics during the forward direction of a jump-landing task. Athletes perform many movements in the air and land in multi-directions. Therefore, the purpose of this study was to assess the peak knee valgus angle (PKVA) during one leg jump-landing in various directions.
Eighteen male basketball and volleyball athletes participated in the study. Participants performed one leg jump-landing tests from a 30 cm height platform in four directions. Knee valgus motion was measured using Vicon™ motion system. The data were analyzed with repeated measures ANOVA.
Direction significantly (P<0.001) influenced the PKVA during landing. Significantly higher PKVA was observed for the lateral (8.8°±4.7°) direction as compared to forward (5.8°±4.6°) direction (P<0.05). The PKVA in 30° diagonal (7.5°±4.6°) and 60° diagonal (7.7°±5.7°) directions was higher than in the forward direction (P<0.05).
One leg jump-landing in lateral and diagonal directions results in a higher PKVA compared to landing in a forward direction and could lead to a higher risk of knee injury.
落地任务期间过度的膝外翻是导致膝关节损伤的一个因素。大多数研究考察了向前方向的跳跃落地任务中的下肢生物力学。运动员在空中会进行多种动作并向多个方向落地。因此，本研究的目的是评估单腿向不同方向跳跃落地时的膝外翻峰值角度（PKVA）。
18名男性篮球和排球运动员参与了本研究。参与者从30厘米高的平台进行四个方向的单腿跳跃落地测试。使用Vicon™运动系统测量膝外翻运动。数据采用重复测量方差分析进行分析。
方向对落地时的PKVA有显著影响（P<0.001）。与向前方向（5.8°±4.6°）相比，外侧方向（8.8°±4.7°）的PKVA显著更高（P<0.05）。30°对角线方向（7.5°±4.6°）和60°对角线方向（7.7°±5.7°）的PKVA高于向前方向（P<0.05）。
与向前落地相比，单腿向外侧和对角线方向跳跃落地会导致更高的PKVA，并可能导致更高的膝关节损伤风险。
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