Longer reaction time of the fibularis longus muscle and reduced postural control in basketball players with functional ankle instability: A pilot study.

Phys Ther Sport

Exercise Science Laboratory, School of Kinesiology, Faculty of Medicine, Finis Terrae University, Av. Pedro de Valdivia 1509, 7500000 Santiago, Chile. Electronic address:

Published: August 2015

Background: Motor control evaluation in subjects with functional ankle instability is questionable when both ankles of the same subject are compared (affected vs non-affected).

Objective: To compare the postural control and reaction time of ankle muscles among: basketball players with FAI (instability group), basketball players without FAI (non-instability group) and healthy non-basketball-playing participants (control group).

Design: Case-control study.

Setting: Laboratory.

Participants: Instability (n = 10), non-instability (n = 10), and control groups (n = 11).

Main Outcome Measures: Centre of pressure variables (area, velocity and sway) were measured with a force platform. Reaction time of ankle muscles was measured via electromyography.

Results: A one-way ANOVA demonstrated that there were significant differences between the instability and non-instability groups in the fibularis longus (p < 0.001), fibularis brevis (p = 0.031) and tibialis anterior (p = 0.049) muscles. Repeated-measures ANOVA and post hoc analysis determined significant differences for the area between the instability and non-instability groups (p = 0.001).

Conclusion: Basketball players with FAI have reduced postural control and longer reaction time of the fibularis and tibialis anterior muscles.

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http://dx.doi.org/10.1016/j.ptsp.2014.10.008DOI Listing

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