You've seen the big inflatable balls at the gym. Usually doing the same boring old crunches. Here are a few other exercises you can do to smoke your core on the ball. Enjoy my shaky voice.
Core exercises on the Swiss ball
You've seen the big inflatable balls at the gym. Usually doing the same boring old crunches. Here are a few other exercises you can do to smoke your core on the ball. Enjoy my shaky voice.