Racquetball is no joke. You sweat A LOT chasing that small rubber ball. It goes fast too, which means your eye-hand coordination gets an amazing workout. (You also burn over 200 calories in just 30 minutes.) I can still remember how bummed my dad got when they turned his racquetball court into an aerobics studio. I'm however, still hoping for a comeback, or at the very least, to find a few more courts near my house.