It's a new, if not odd, sight inside some public pools in Washington, D.C.: people kicking submerged punching bags, spinning on poles that rise from the water, jumping up and down on floating boards.

Changing the perception of aquatic exercises is the most important thing at Shockwave Aqua Fitness. "Everyone was telling us that when you come to our classes, you're shocked that you're actually ...

If the treadmill or elliptical doesn't appeal to you, you can don your swimsuit and try water aerobics. The pool-based exercises are particularly beneficial for older adults and others who don't want ...