A 4-week biodex stability exercise program improved ankle musculature onset, peak latency and balance measures in functionally unstable ankles

Behnam Akhbari, Ismail Ebrahimi Takamjani, Mahyar Salavati and Mohammad Ali Sanjari

The purpose of this study was to examine the effects of Biodex stability training on the onset of muscle activity and balance measures in participants with functional ankle instability (FAI).  The musculature onset and peak latency of the peroneals, tibialis anterior and soleus of 15 patients with FAI were recorded with surface electromyography (EMG) in response to sudden 10°, 20° and 30° inversions by an Ankle Perturbation System (APS), both before and after stability training. Participants underwent a monitored 4-week Biodex stability program (12 min per session, three times a week). Pre-and post-training balance measures were also recorded by the Biodex Stability System.  Post-training, there was a significant decrease in muscle onset and peak latency for the peroneals and tibialis anterior, and a significant improvement in balance measures.  Based on the present results the authors recommend a Biodex stability exercise program for the rehabilitation of FAI.

Physical Therapy in Sport, In Press, Corrected Proof, Available online 17 May 2007

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