Thanks for your help! I don't think I can do the Bikram yoga-isn't that the one with the intense heat? I think I'm looking more for the core strength/flexibility. I also do ballet and belly dancing--since I can't afford to do as many private lessons as I'd like, and don't participate as much in the group classes as I used to, I'm trying to supplement with other things. I don't really need to lose weight, but need to tone/tighten. I did get a Pilates video--it's a little advanced for me, but I think I can work with it. It has 5 10-minute workouts for abs, flexibility, etc. I also have a yoga video that my daughter bought a few years ago, so I may work with that, too. Lots of options! I just want to make the best use of my time/money.