Well, for something to be cardio, it has to do more than just get your heart pumping. ;) While it's true that many strength-based workouts can get your heart going, they still don't burn a lot of calories because of the way your muscles are activated. Most barre workouts are true strength training - while they may be difficult for you, and even get your heart working, they aren't a replacement for cardio.
As with any strength training, it's not something you want to do every day. Rest days are important to let your muscles recover and heal... that's how they get stronger. If you do them daily, you'll end up breaking your muscles down rather than building them up.
Edited by: DRAGONCHILDE at: 4/14/2013 (17:21)