That’s a lack of shoulder flexion—and a recipe for back pain. The ultimate shoulder mobility test, says Hanrahan, is this: Stand with your back against a wall, hands overhead, butt ...

Seated wall flexion Start seated with your back against a wall, knees bent, feet flat on the floor, and arms extended overhead in a narrow V position. With control, lower arms down to tap floor ...

A normal range of motion for shoulder flexion is 180 degrees. This involves moving your arms from palms against the side of your body to the highest point you can raise your arms over your head.

QUICK, STAND UP and reach your arm overhead. Does your back arch as you do this? Does your chest puff out like a cartoon character? If you answered both questions with a resounding 'yes,' then ...