Document Type : Original article
Authors
1
Master of biomechanics, Department of physical education and sports sciences, Kharazmi University, Tehran, Iran
2
Full Professor of Sport Biomechanics, Department of Sport Biomechanics and Sport Injuries, Faculty of Physical Education and Sport Science, Kharazmi University, Tehran, Iran. Full Professor of Sport Biomechanics, Research Institute
3
3. Department of Sports Biomechanics and Injuries, Faculty of Physical Education and Sports Sciences, Birjand University, Birjand, Iran
10.32598/SJRM.14.4.3354
Abstract
Background and Aims Given the negative impact of chronic ankle instability (CAI) on the quality of life and daily motor function, this study aims to compare the active tensile force of the peroneus longus muscle during the gait initiation between athletes with CAI and healthy controls using musculoskeletal modeling in OpenSim software, , version 3.2.
Methods In this cross-sectional study, 19 professional male and female athletes with CAI (aged 18–25 years) with a history of at least two ankle sprains in the past 3-12 months, and 19 healthy athletes (aged 18–25 years) participated. Participants stood on a force plate and began walking upon hearing an auditory cue. Using the gait2392 model in OpenSim, the force generated by the peroneus longus muscle during gait initiation was calculated. Additionally, spatiotemporal parameters (stride length, stride speed, stride time) and the anticipatory postural adjustment (APA) phase duration were extracted based on center of pressure (COP) data and surface marker positions.
Results The results showed that the peroneus longus muscle force (P=0.006) and the APA phase duration (P=0.002) were significantly lower in the CAI group compared to the healthy group. Conversely, stride length (P=0.001), stride speed (P=0.001), and stride time (P=0.04) were significantly higher in the CAI group than in the control group.
Conclusion The athletes with CAI have a lower active tensile force of the peroneus longus muscle and a shorter APA duration during gait initiation compared to healthy peers. This suggests a potential association between impaired proprioceptive function, weakness of the peroneus longus muscle, and deficits in anticipatory postural control. Moreover, the observed increases in spatiotemporal gait parameters may serve as compensatory strategies to mitigate these functional impairments.
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