ABSTRACT
This article reviewed the changes of ankle muscle strength after lower limb joint injuries and the isokinetic test mode which could reflect this characteristic better. The varus plantarflexion strength decreased significantly after plantarflexion injury of ankle joint. The dorsiflexor strength of ankle joint could not reach the level of the healthy side for a long time after anterior cruciate ligament rupture and Achilles tendon injury. Ankle isokinetic muscle test included testing direction, muscle contraction form and testing speed. It is meaningful to test varus/valgus and plantar/dorsal flexion in ankle joint sprain and functional ankle instability; however, the muscle contraction form and testing speed have little effect on the result.