For example, as the ball wobbles back and forth while you use it, you activate balancing muscles, in addition to your main core ... with no weight at all, it's still a beneficial ab workout.
How to do it: Stand facing away from the wall holding a slam ball out in front of you. Quickly, and with force, rotate 90° to one side toward the wall to slam the ball into it. Catch it on the rebound ...
Flutter kicks are the seated ... in your hips, core and legs will transfer to better balance and stabilization, especially if you enjoy weight lifting or running, making the exercise great for ...