OBJECTIVE: To evaluate the effects of ankle braces on plantar loading during athletic tasks.
METHODS: Cross-sectional study.
METHODS: Laboratory.
METHODS: A total of 36 participants (11 men, 25 women; age = 23.1 ± 2.5 years, height = 1.72 ± 0.09 m, mass = 66.3 ± 14.7 kg) were recruited for this study.
METHODS: Participants completed walking, running, and cutting tasks in 3 bracing conditions: no brace, lace-up ankle-support brace, and semirigid brace.
METHODS: We analyzed the plantar-loading variables of contact area, maximum force, and force-time integral for 2 midfoot and 3 forefoot regions and assessed the displacement of the center of pressure. A 3 × 3 mixed-model repeated-measures analysis of variance was used to determine the effects of brace and foot type (α = .05).
RESULTS: Foot type affected force measures in the middle (P range = .003-.047) and the medial side of the foot (P range = .004-.04) in all tasks. Brace type affected contact area in the medial midfoot during walking (P = .005) and cutting (P = .01) tasks, maximum force in the medial and lateral midfoot during all tasks (P < .001), and force-time integral in the medial midfoot during all tasks (P < .001). Portions of the center-of-pressure displacement were affected by brace wear in both the medial-lateral and anterior-posterior directions (P range = .001-.049).
CONCLUSIONS: Ankle braces can be worn to redistribute plantar loading. Additional research should be done to evaluate their effectiveness in injury prevention.
目的:评估踝关节支具在运动任务中对足底负荷的影响。
方法:横断面研究。
方法:实验室。
方法:共有36名参与者(11名男性,25名女性;年龄=23.1±2.5岁,高度=1.72±0.09m,mass=66.3±14.7kg)用于本研究。
方法:参与者完成步行,跑步,3种支撑条件下的切割任务:无支撑,系带脚踝支撑支架,和半刚性支架。
方法:我们分析了接触面积的足底载荷变量,最大力,2个中足和3个前足区域的力-时间积分,并评估压力中心的位移。使用3×3混合模型重复测量方差分析来确定支具和脚型的影响(α=.05)。
结果:在所有任务中,在脚的中间(P范围=.003-.047)和内侧(P范围=.004-.04)的脚型影响力测量值。在行走(P=0.005)和切割(P=0.01)任务期间,中足内侧支型受影响的接触区域,在所有任务期间,内侧和外侧中足的最大力(P<.001),在所有任务期间,中足内侧的力-时间积分(P<0.001)。压力中心位移的部分受到内外侧和前后方向的支架磨损的影响(P范围=.001-.049)。
结论:可以佩戴踝带以重新分配足底负荷。应进行更多研究以评估其在预防伤害方面的有效性。