I can do all the catas and barely finish Max300, so I'm definitely doing songs that will get and keep my heart rate up. As for water, I've been using water while playing DDR for quite some time now. I ...
I've been playing DDR for 11 months now, and I weigh the same as I did when I started. This isn't to say that DDR doesn't work, because if I never started playing I'd probably have gained a lot of wei ...