Concentric plantar flexor torque deficits in female athletes with functional ankle instability

After an ankle injury, residual symptoms can followed to recurrent sprain in physical activity and 30% of its lead to functional ankle instability (FAI) Therefore, the aim of this study was to examine the isokinetic concentric and eccentric torque measures of the ankle musculature to body weight in female athletes with and without FAI.30 female athletes, who play in pro league of Tehran, participated in this descriptive study. Participants were assessed using questionnaire and clinical tests. Isokinetic measurement speed for inversion and eversion was 60 and plantar flexion and dorsi flexion was 120 degree/ second.Data were analyzed by independent T- test.The results indicated a significant difference in peak torque of concentric plantar flexor to body weight in FAI and healthy groups (P<0.05).Therefore, concentric plantar flexion may be an important contributing factor to FAI; this finding could also lead to more effective protocols in the treatment and rehabilitation of FAI.