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Published on Tuesday, February 24, 2009 by admin Working your abs with an exercise ball can be an exhilarating way to get a great workout! Exercise balls are fun and simple, but they add an edge to a workout. The most basic ab routines to do with an exercise ball are a basic crunch and a medicine ball crunch. A regular crunch will require the use of a larger inflatable exercise ball. These balls are bouncy, and t...