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Purpose：To describes the important aspects of the foot and ankle movement and function used when git and balance strategy.
Method：The foot and ankle was a very important roles in the lower limb movement and gait.
This study summarizes the physiologic movement of knee to the PNF lower extremity patterns.
Result：The ankle joint composed of the talocural joint, the subtalarl joint, transverse tarsal joint, talocalcaneonavicular joint. The onset of dorsiflexion muscle activity starts in pre swing gait patterns. First contract muscle is the extensor hallucis. Activity of tibialis anterior and extensor digitorum longus quickly follows in mid swing gait phase. During stance phase, the soleus and gastrocnemius muscle provided plantar flexor torque, which muscle reacts quickly to restrain ankle dorsiflexion, and contributes modulated control of the ankle motion in gait patterns.
Conclusions：The understanding of ankle kinematics, could provide a good therapeutic approach for improving gait patterns in patients with various pathological condition.