Static Platform Model Evaluation For Study Of Sudden Ankle Movement.

Abstract

PURPOSE: Ankle sprains are very common in sports and can cause joint instability with clinical and performance consequences. The sudden ankle inversion platform that simulates the sprain movement evaluates the movements performed associated with the electromyography of the fibular and anterior tibial muscles. The aim of this research is to develop a sudden ankle inversion platform limited to 15° medial rotation, 20° plantar flexion, 20° inversion, and to evaluate the mechanical sprain movement associated with the electromyographic response of the fibular and anterior tibial muscles of soccer players. METHODS: A total of 30 soccer players between 16 and 19 years old without history of ankle sprain were studied at the ankle assessment platform. Each athlete was randomly subjected to ankle sprain movement on the platform for 10 repetitions (five on each limb), associated with electromyography of the anterior tibial and fibular muscles. Friedman statistical tests were performed with related samples of nonparametric quantitative data, in cases where there was significance (p<0.05) Dunn's post-test was performed. RESULTS: There was no statistical difference (p>0.05) between latency of movement (0.9 ± 0.2 ms) and to reach the maximum range of motion during plantar flexion (78 ± 4 .2 ms) and medial rotation (120 ± 2.3 ms) . There was an increase in the angular velocity of inversion (p<0.05) during the attempts (230 ± 20.6 °/s) . There was no difference (p>0.05) in latency time of the anterior tibial (25± 5.2 ms) and fibular muscles (33 ± 4.1 ms). CONCLUSION: The sudden static platform was reliable to evaluate the movements performed by the ankle during mechanical sprain, with no difference in the mechanical and electromyographic behavior evaluated during the 10 repetitions.