eHow launches Android app: Get the best of eHow on the go.
Summary: Doing abdominal crunches on the Bosu Ball is a great way to strengthen back muscles. Learn to do abdominal crunch core exercises with the Bosu Ball using tips from a fitness trainer in this free exercise video.
"This functional core exercise using the Bosu is abdominal crunches. This is really great for your back, so if you have back issues, the Bosu will really help to support your lower back. So simply just come on down. Make sure that you place the small of your back onto the Bosu. Place your feet hip-width apart. Place your hands...we've got three levels here. Place your arms across your chest and then you just want to simply lift up, really feel a nice little crunch right here in your abdominal muscles and then come back. As you're lifting and lowering make sure that you have the proper breathing down. So you exhale, really crunch those abs and then inhale as you come back. Exhale up, inhale back. Now imagine that you have just a little tennis ball between your chin and your chest so that you're insuring that you're keeping your head, neck and spine in alignment. To make it a little bit more challenging, lightly place your fingertips behind your ears and then to make it really tough, extend your arms overhead. Up and down. Those are your abdominal crunches using the Bosu."
eHow Article: Bosu Ball Core Exercises: Abdominal Crunches