Department of Human Movement Sciences, University of Wisconsin-Milwaukee, Milwaukee, WI 53201-0413, USA.
J Athl Train. 2011 Jul-Aug;46(4):358-65. doi: 10.4085/1062-6050-46.4.358.
Foot-orthosis (FO) intervention to prevent and treat numerous lower extremity injuries is widely accepted clinically. However, the results of quantitative gait analyses have been equivocal. The foot models used, participants receiving intervention, and orthoses used might contribute to the variability.
To investigate the effect of a custom-molded FO intervention on multisegment medial foot kinematics during walking in participants with low-mobile foot posture.
Crossover study.
University biomechanics and ergonomics laboratory.
Sixteen participants with low-mobile foot posture (7 men, 9 women) were assigned randomly to 1 of 2 FO groups.
INTERVENTION(S): After a 2-week period to break in the FOs, individuals participated in a gait analysis that consisted of 5 successful walking trials (1.3 to 1.4 m/s) during no-FO and FO conditions.
MAIN OUTCOME MEASURE(S): Three-dimensional displacements during 4 subphases of stance (loading response, midstance, terminal stance, preswing) were computed for each multisegment foot model articulation.
Repeated-measures analyses of variance (ANOVAs) revealed that rearfoot complex dorsiflexion displacement during midstance was greater in the FO than the no-FO condition (F(1,14) = 5.24, P = .04, partial η(2) = 0.27). Terminal stance repeated-measures ANOVA results revealed insert-by-insert condition interactions for the first metatarsophalangeal joint complex (F(1,14) = 7.87, P = .01, partial η(2) = 0.36). However, additional follow-up analysis did not reveal differences between the no-FO and FO conditions for the balanced traditional orthosis (F(1,14) = 4.32, P = .08, partial η(2) = 0.38) or full-contact orthosis (F(1,14) = 4.10, P = .08, partial η(2) = 0.37).
Greater rearfoot complex dorsiflexion during midstance associated with FO intervention may represent improved foot kinematics in people with low-mobile foot postures. Furthermore, FO intervention might partially correct dysfunctional kinematic patterns associated with low-mobile foot postures.
足部矫形器（FO）干预措施被广泛应用于预防和治疗多种下肢损伤，在临床上已得到认可。然而，定量步态分析的结果存在争议。这可能是由于所使用的足部模型、接受干预的参与者和使用的矫形器的不同造成的。
研究定制 FO 干预对低活动度足部姿势参与者行走时多节段内侧足部运动学的影响。
交叉研究。
大学生物力学和人体工程学实验室。
16 名低活动度足部姿势患者（7 名男性，9 名女性）随机分为 2 个 FO 组之一。
在 FO 适应期 2 周后，个体参与了步态分析，包括在无 FO 和 FO 条件下进行 5 次成功的行走试验（1.3 至 1.4 m/s）。
计算每个多节段足部模型关节在 4 个支撑相（负重反应、中间支撑、终末支撑、预摆）中的三维位移。
重复测量方差分析（ANOVA）显示，FO 条件下中支撑时后足复合体背屈位移大于无 FO 条件（F（1，14）=5.24，P=0.04，部分η²=0.27）。终末支撑重复测量 ANOVA 结果显示，第一跖趾关节复合体的插入物与插入物条件存在交互作用（F（1，14）=7.87，P=0.01，部分η²=0.36）。然而，进一步的后续分析并未发现无 FO 和 FO 条件下平衡传统矫形器（F（1，14）=4.32，P=0.08，部分η²=0.38）或全接触矫形器（F（1，14）=4.10，P=0.08，部分η²=0.37）之间存在差异。
FO 干预措施可使中支撑时后足复合体背屈增加，这可能代表着低活动度足部姿势患者足部运动学的改善。此外，FO 干预可能部分纠正与低活动度足部姿势相关的功能运动学模式。
