The Push up has a reputation as a great upper body exercise, but is is also a great total body exercise that challenges your core. Push ups work many of your upper body muscles including the pec major and minor, triceps, deltoids, rhomboids and your trapezius. But in order to gain the stabilization needed to do a correct push-up, both your core and lower body muscles must act as a stabilizer throughout. Watch this video to learn how you can perfect your push-up.