The characteristic of the angle of the ankle joint in individuals with chronic ankle instability during lateral hop maneuver

Abstract

The purpose of this study was to investigate the characteristic of the ankle joint angle during lateral hop maneuver in individuals with chronic ankle instability. 27 subjects were participated and measured the angle of the ankle inversion/eversion and dorsal/plantar flexion during lateral hop using 3D motion analysis system. The angle of the dorsal flexion at foot contact phase was 0.5±3.9° in normal ankle and 3.7±3.5° in sprained ankle. The sprained ankle had less dorsal flexion position at foot contact phase during lateral hop (p<0.05). The angle of the dorsal flexion at take off phase was 2.3±3.4° in normal ankle and 4.9±3.5° in sprained ankle. The angle of ankle dorsal flexion in sprained ankle was significant greater than normal ankle. There was no significant difference in the angle of the ankle inversion/eversion between the normal ankle and the sprained ankle.