Department of Human Movement Science and Exercise Physiology, Institute of Sport Science, Friedrich Schiller University Jena, Seidelstraße 20, 07749, Jena, Germany.
Department of Human Movement Science and Exercise Physiology, Institute of Sport Science, Friedrich Schiller University Jena, Seidelstraße 20, 07749, Jena, Germany.
Gait Posture. 2021 Jun;87:149-155. doi: 10.1016/j.gaitpost.2021.04.037. Epub 2021 Apr 25.
Individuals with chronic ankle instability (CAI) have an increased risk for recurrent injuries. The preventive effects of external ankle supports are not fully understood. This study aimed to examine the effect of elastic ankle support on running ankle kinematics.
3D running gait analysis of individuals with and without CAI was conducted at three-minute-running trials at 2.78 m/s with and without elastic ankle support in a randomised order. Ankle kinematics and intra-individual standard deviations (variability) were calculated at each percent of the running gait cycle. Group and ankle support effects were calculated using statistical parameter mapping.
Twenty-seven individuals were analysed (CAI: n = 14, controls: n = 13). When wearing ankle support, CAI individuals showed significantly decreased plantarflexion angles at 43-47 % (p = 0.033) and 49-51 % (p = 0.043) of the running gait cycle compared to normal running. In healthy controls, no differences in ankle angles between both conditions were found. Comparisons between CAI individuals and healthy controls showed statistically significant differences in the plantar-/dorsiflexion angles at 38-41 % (p = 0.044) with ankle support and at 34-46 % (p = 0.004) without ankle support. Significant ankle angle variability differences were found for ankle in-/eversion between CAI individuals and healthy controls (p = 0.041) at 32-33 % of the running gait cycle.
Elastic ankle support reduces the range of sagittal plane running ankle kinematics of CAI individuals but not of healthy controls. Further research is needed to evaluate the association between ankle support effects and the risk for recurrent ankle sprains.
慢性踝关节不稳（CAI）患者的复发性损伤风险增加。外踝支撑的预防效果尚未完全了解。本研究旨在研究弹性踝支持对跑步踝关节运动学的影响。
以 2.78m/s 的速度进行 3D 跑步步态分析，患有和不患有 CAI 的个体在 3 分钟跑步试验中，以随机顺序分别佩戴和不佩戴弹性踝支撑进行。在每个跑步步态周期的百分比处计算踝关节运动学和个体内标准差（变异性）。使用统计参数映射计算组和踝支撑效果。
分析了 27 名个体（CAI：n=14，对照组：n=13）。当佩戴踝支撑时，CAI 个体在跑步步态周期的 43-47%（p=0.033）和 49-51%（p=0.043）处显示出明显较小的跖屈角度。在健康对照组中，两种情况下的踝关节角度没有差异。CAI 个体与健康对照组之间的比较显示，在 38-41%（p=0.044）和 34-46%（p=0.004）有踝支撑和无踝支撑时，跖屈/背屈角度存在统计学显著差异。在跑步步态周期的 32-33%处，CAI 个体与健康对照组之间发现明显的内/外翻踝关节角度变异性差异（p=0.041）。
弹性踝支撑可减少 CAI 个体矢状面跑步踝关节运动学的范围，但对健康对照组没有影响。需要进一步研究来评估踝支撑效果与复发性踝关节扭伤风险之间的关联。
