Activation of Selected Ankle Muscles During Exercises Performed on Rigid and Compliant Balance Platforms

Abstract

STUDY DESIGN: Experimental laboratory study. OBJECTIVE: To compare how the design of 2 balance platforms affects ankle musculature activation for various weight-bearing exercises. BACKGROUND: Balance platforms are widely used in both training and rehabilitation, and a better understanding of how platform design and type of exercise modify the demands on the ankle musculature may be helpful in staging exercise progression. METHODS: Surface electromyography was used to measure the activation level of the fibularis Ipngus, tibialis anterior, and medial gastrocnemius while performing 4 exercises on 2 different balance platforms (compliant and rigid). Twenty-four (12 females, 12 males) healthy, sedentary subjects participated in the study. Analysis of variance was used for statistical analysis. RESULTS: There was no significant interaction between balance platforms and exercises (P>.05), and the type of platform did not influence muscle activation for the 3 muscles monitored (P>.05). The highest activation level for the fibularis longus and medial gastrocnemius was obtained during single-leg stance, and for the tibialis anterior during the single-leg squat (P<.05). CONCLUSION: In this study, although the demands on the ankle musculature were similar for selected exercises performed on a compliant versus a rigid balance platform, muscle activation level varied based on the exercise.