dancing five hours day or longer improves condition of your heart and lungs. increased muscular strength, endurance and motor fitness. increased aerobic fitness. improved muscle tone and strength.
Depending on the type of dancing you do, you will, most likely, gain or maintain flexibility, and, if you dance fast enough to elevate your heart rate to a certain level, you'll be getting a good aerobic/cardio workout. Also, you'll burn up to 600 calories (I'm just estimating here), so you'll probably lose some fat.
