Journal of foot and ankle research
Side-Step Cutting Foot Biomechanics and Intrinsic Foot Muscle Sizes in People With Chronic Ankle Instability
By Peters-Dickie JL, Detrembleur C, Lobet S and 1 others.
Abstract
Introduction
Lateral ankle sprains commonly occur during directional changes and often lead to chronic ankle instability (CAI) associated with altered movement patterns, muscle weakness and atrophy. This study aimed to compare foot joint biomechanics during cutting among individuals with CAI, copers, and uninjured controls and to explore the relationship between intrinsic foot muscle sizes and functional status.
Methods
Cross-sectional study. Sixty-nine recreationally active males (25.4 ± 4 years) were categorised by perceived instability and self-reported function. Ankle and foot joint kinematics and kinetics were assessed using a multi-segment foot model during 45° side-step cutting at a mean approach speed of 3.5 m·s-1. Groups were compared using ANOVA or Kruskal-Wallis tests, and continuous biomechanical data were analysed using statistical parametric or non-parametric mapping. Cross-sectional area and thickness of the abductor hallucis and flexor digitorum brevis were recorded using ultrasound imaging. Muscle sizes were explored using general linear models, and correlations with questionnaire scores and physical examination outcomes were calculated.