Faculty of Liberal Arts and Sciences, Chukyo University, 101-2 Yagoto Honmachi, Showa-ku, Nagoya-shi, Aichi, 466-8666, Japan.
Department of Sports Medicine, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan.
Phys Ther Sport. 2020 Nov;46:89-96. doi: 10.1016/j.ptsp.2020.08.012. Epub 2020 Aug 28.
To investigate whether ankle joint laxity alone influences lower limb kinematics during a side-cutting task.
A cross-sectional study.
Sports medicine research laboratory.
In total, 66 male collegiate soccer players with history of ankle sprains with no perceived ankle instability were categorised into three groups: no-laxity copers (n = 26), laxity copers (n = 23), and severe-laxity copers (n = 17).
The hip, knee, ankle, rearfoot, midfoot, and forefoot kinematic data during the stance phase (0%-100% indicated initial contact to take-off) of a 45° side-cutting task were analysed using one-dimensional statistical parametric mapping.
The horizontal plane kinematics of the rearfoot differed significantly among the three groups during 30%-91% of the stance phase (P < .05). Severe-laxity copers exhibited a greater external rotation angle than no-laxity copers during 6%-14% and 32%-92% of the stance phase (P < .05).
Our data suggest that severe ankle joint laxity affects rearfoot horizontal plane kinematics in individuals without perceived ankle instability performing a 45° side-cutting task. These findings could be used by clinicians in developing rehabilitation programs to prevent further ankle sprains in patients with severe ankle joint laxity.
研究踝关节松弛度是否单独影响侧移任务中的下肢运动学。
横断面研究。
运动医学研究实验室。
共有 66 名有踝关节扭伤史且无踝关节不稳定感的男性大学生足球运动员，分为三组：无松弛度适应者（n=26）、松弛度适应者（n=23）和严重松弛度适应者（n=17）。
采用一维统计参数映射分析 45°侧移任务支撑相（0%-100%表示初始接触到起飞）期间的髋关节、膝关节、踝关节、后足、中足和前足运动学数据。
在支撑相的 30%-91%期间，三组后足的水平面运动学存在显著差异（P<0.05）。严重松弛度适应者在支撑相的 6%-14%和 32%-92%期间，外旋角度大于无松弛度适应者（P<0.05）。
我们的数据表明，在没有感知到踝关节不稳定的情况下，严重的踝关节松弛度会影响进行 45°侧移任务的个体的后足水平面运动学。这些发现可由临床医生用于制定康复计划，以防止严重踝关节松弛度患者进一步发生踝关节扭伤。
