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What is Muscle used in normal walk during stance and swing and explain in detail?
Each leg goes through stance phase and swing phase in normal walking.
Stance phase - Foot on ground. 60% of gait. 
Main muscles involved are

   Heel strike - quadriceps, hamstrings, tibialis anterior
   Mid stance - quadriceps, hamstrings, tibialis anterior, gluteus maximus
   Push off - gastrocnemius -soleus

Swing phase - Foot not on ground, 40% of gait.
Main muscles involved are

   Acceleration - quadriceps
   Swing through - iliopsoas
   Deceleration - hamstrings and tibialis anterior.