How to do a push up.
Place feet not farther than 6 inches apart. Hands shoulder width apart. Keep you body in a straight line. Bend your back to lower your body as a single unit until you upper arms are parallel to the ground. Return to starting potion.
Place feet not farther than 12 inches apart. Hands shoulder width apart. Keep you body in a straight line. Bend your elbows to lower your body as a single unit until you upper arms are parallel to the ground. Return to starting potion.