In other words, you can turn a Bosu ball to either side and still get a killer workout on the wobbly surface ... side of Bosu ball and elbows under shoulders. Extend right arm out to tap floor ...

The shoulder is one of the most ... you'll be able to go higher with your exercises," she says, recommending the resistance elevation using a small, looped band as a good place to start.

We're going to do a 10-minute, total body workout ... your shoulders. A couple more. All right. Good job, guys. Now we're going to move on to hamstring curl. Lie back, heels on the ball.