Guillermo Méndez-Rebolledo1, Eduardo Guzmán-Muñoz2, Valeska Gatica-Rojas3, Hermann Zbinden-Foncea4. 1. Exercise Science Laboratory, School of Kinesiology, Faculty of Medicine, Finis Terrae University, Av. Pedro de Valdivia 1509, 7500000 Santiago, Chile; Human Motor Control Laboratory, Faculty of Health Sciences, University of Talca, Av. Lircay s/n, 3460000 Talca, Chile. Electronic address: gmendez@utalca.cl. 2. Exercise Science Laboratory, School of Kinesiology, Faculty of Medicine, Finis Terrae University, Av. Pedro de Valdivia 1509, 7500000 Santiago, Chile; School of Kinesiology, Faculty of Health, Santo Tomas University, Av Carlos Schörr 255, 3460000 Talca, Chile. Electronic address: eguzmanm@santotomas.cl. 3. Human Motor Control Laboratory, Faculty of Health Sciences, University of Talca, Av. Lircay s/n, 3460000 Talca, Chile. Electronic address: vgatica@utalca.cl. 4. Exercise Science Laboratory, School of Kinesiology, Faculty of Medicine, Finis Terrae University, Av. Pedro de Valdivia 1509, 7500000 Santiago, Chile. Electronic address: hzbinden@uft.cl.
Abstract
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.
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.
Authors: Ainsley Rossi; Sara Blaustein; Joshua Brown; Kari Dieffenderfer; Elaine Ervin; Steven Griffin; Elizabeth Frierson; Kathleen Geist; Marie Johanson Journal: Int J Sports Phys Ther Date: 2017-12
Authors: Luis López-González; Deborah Falla; Irene Lázaro-Navas; Cristina Lorenzo-Sánchez-Aguilera; Isabel Rodríguez-Costa; Daniel Pecos-Martín; Tomás Gallego-Izquierdo Journal: Int J Environ Res Public Health Date: 2021-02-21 Impact factor: 3.390