School of Kinesiology, Lakehead University, Thunder Bay, Canada.
Applied Health Sciences, University of Manitoba, Winnipeg, Canada.
Sports Biomech. 2023 Aug;22(8):1063-1077. doi: 10.1080/14763141.2020.1778777. Epub 2020 Jul 9.
This study explored the effects of no braces, softshell (AE), and semi-rigid (T1) ankle braces on time to complete a modified agility task, as well as lower extremity muscle activity and impulse during the change of direction component of the task. Thirty-nine healthy, active individuals completed a modified agility task under the three brace conditions. Time to complete the modified agility task, along with mean surface electromyographic activity (sEMG) and impulse during the deceleration and propulsive phases of the task were measured. There were no significant differences across conditions with respect to sEMG or impulse measures during the deceleration or propulsive phases. There was a significant change in time to complete the modified agility task, (2,76) = 17.242, < 0.001, ηp = 0.312. Post-hoc analysis revealed a significant increase in time to complete the modified agility task when wearing the AE (0.16 (95% CI, 0.062 to 0.265) seconds, < 0.001) and T1 (0.20 (95% CI, 0.113 to 0.286) seconds, < 0.001) ankle braces compared to no braces. It appears that performance on a modified agility task may be diminished when wearing ankle braces, although sEMG activity and impulse are unaffected.
本研究探讨了无支具、软壳（AE）和半刚性（T1）踝支具对改良敏捷任务完成时间的影响，以及在任务转向部分下肢肌肉活动和冲量的影响。39 名健康、活跃的个体在三种支具条件下完成了改良敏捷任务。测量了改良敏捷任务的完成时间，以及在任务减速和推进阶段的平均表面肌电图（sEMG）和冲量。在减速或推进阶段，sEMG 或冲量测量值在各条件之间没有显著差异。完成改良敏捷任务的时间有显著变化，(2,76)=17.242，<0.001，ηp=0.312。事后分析显示，穿 AE（0.16（95%CI，0.062 至 0.265）秒，<0.001）和 T1（0.20（95%CI，0.113 至 0.286）秒时，改良敏捷任务的完成时间显著增加，<0.001）踝支具与无支具相比。佩戴踝支具可能会降低改良敏捷任务的表现，尽管 sEMG 活动和冲量不受影响。
