<P> All four quadriceps are powerful extensors of the knee joint . They are crucial in walking , running , jumping and squatting . Because rectus femoris attaches to the ilium , it is also a flexor of the hip . This action is also crucial to walking or running as it swings the leg forward into the ensuing step . The quadriceps , specifically the vastus medialis , play the important role of stabilizing the patella and the knee joint during gait . </P>
<P> All four quadriceps are powerful extensors of the knee joint . They are crucial in walking , running , jumping and squatting . Because rectus femoris attaches to the ilium , it is also a flexor of the hip . This action is also crucial to walking or running as it swings the leg forward into the ensuing step . The quadriceps , specifically the vastus medialis , play the important role of stabilizing the patella and the knee joint during gait . </P>
what is the principle action of the vastus lateralis and the other quadriceps muscles
what is the principle action of the vastus lateralis and the other quadriceps muscles
crucial in walking , running , jumping and squatting
crucial in walking , running , jumping and squatting