PDF(Pubmed)
Abstract：
BACKGROUND: Arch height is one important aspect of foot posture. An estimated 20% of the population has pes planus and 20% has pes cavus. These abnormal foot postures can alter lower extremity kinematics and plantar loading and contribute to injury risk. Ankle bracing is commonly used in sport to prevent these injuries, but no researchers have examined the effects of ankle bracing on plantar loading.
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.
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.
摘要：
背景：足弓高度是足部姿势的一个重要方面。估计有20％的人口患有扁平苔藓，而20％的人口患有扁平苔藓。这些异常的足部姿势会改变下肢运动学和足底负荷，并增加受伤风险。脚踝支撑通常用于运动中以防止这些伤害，但是没有研究人员研究过踝关节支撑对足底负荷的影响。
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。
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。
