Each of these 4 muscles has a different, yet important, role to play - so you want to make sure that your workouts train all of them effectively.
Onye ọ bụla n'ime akwara 4 a nwere ọrụ dị iche iche, mana nke dị mkpa - yabụ ịchọrọ ijide n'aka na mgbatị gị na-azụ ha niile nke ọma.