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Summary: Learn an abdominal crunch and core exercises with legs positioned on top of the balance ball in this free how-to video on exercise with a balance ball.
Manny Castro received his BS in Health Education/ Exercise Physiology and Ahtletic Training from Florida International University, and completed several internships in cardiac rehab,...read more
" Hi! This is Manny Castro, Exercise Physiologist. This is another variation of the crunch, however this time we are using a less difficult position by positioning the ball under our legs. Now this crunch, what we do is bring the ball under our ankles. Roll it back. We want our knees at about 90 degrees. Then what we’re going to do is from a regular start position for a crunch, looking straight up, you’re going to bring your chin straight up about 30 degrees and then right back down. You’re going to repeat this about 12-15 repetitions in about 3-4 sets. As you become better at it you can increase your sets and your repetitions."
eHow Article: Abdominal Crunch with Balance Ball Under the Legs