People tend to laugh when I say that I play DDR for a serious workout. When you do level 8 songs for about an hour, it's pretty hardcore cardio. We've known for a couple years now that some hardcore players lost a ton of weight this way, but now people are starting to take it seriously. Need proof?I was right, bitches. If you're too lazy to read: Konami and 24 Hour Fitness signed an agreement to put a DDR machine in all of their gyms.