A Barry's Bootcamp trainer explains why you should do scapular stability exercise moves before an upper body workout to avoid neck and back pain. Photo: Getty Images/Caiaimage/Sam Edwards.

The scapula push-up is a bodyweight exercise that develops shoulder strength, mobility, stability, and injury-prevention. A personal trainer explains how.

Why: Hit the deck for this challenging movement, which uses a potent scapular squeeze to train your back muscles. You'll get some valuable core work in if you do it right, too.