So grab your medicine ball, and let's get going ... especially your lower back, certainly your butt. It's a really great core exercise. 15 more seconds, then we're all done.
Mens Fitness on MSN21d
Trainer Shares 8 Functional Core Exercises Better Than Crunches and SitupsDirections: Add one of these exercises to the end of a strength ... reach down toward your toe with the medicine ball, and ...
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