Underwater Treadmills and workouts under water are thought to provide a more balanced and complete exercise. Plus, there are advantages for rehabilitation.
I've never actually participated in water aerobics but, I've watched it (like a car wreck, I might add). The classes are always full which must be a testament to their effectiveness. I believe it has something to do with reducing the weight exerted on joints. Well, now you can received the same benefits of exercising underwater in the comfort of your own home. No, you don't have to flood your basement. You can use one of these Hydro Physio Lifestyle Underwater Treadmills. This is the latest rage in hydro-training.