(CNN) — When your shoulders ache or feel stiff, your first instinct might be to stretch or massage them. But the real culprit behind most shoulder problems isn’t surface-level tension — it’s more ...

Scapular push-ups: Start in a push-up position with arms straight. To modify, lower to your knees. Without bending your elbows, inhale as you let your chest lower slightly and your shoulder blades ...