The inverted shoulder press is a variation on a pushup that strengthens the chest, shoulders, and triceps. The inverted angle of the exercise places more emphasis on the shoulders.
In a pushup position, place your feet on an exercise bench or box behind you and your hands on the floor in front of you. Straighten your legs, driving your hips into the air while bending them at 90 degrees so your head points toward the floor. Your arms should be fully extended with elbows locked. This is your starting position.
Without changing your body posture, bend your elbows 90 degrees, lowering your body until your head nearly touches the floor. Keep the 90-degree angle at your hips. Hold and push back up into starting position.
Knees should be locked.
Be sure to keep your core tight.
Raise your body until your elbows are completely locked out.