Honestly, most yoga videos have alternate poses for those who can't quite do them perfectly. Yoga isn't all or nothing, and it's not about perfection. If you can, the best option would be to find a class with a good instructor who can help you modify poses so they're safe and effective as you lose weight.
I think yoga's a great idea for anyone, at any size. Want inspiration? Check out this video: www.youtube.com/watch?v=qX9FSZJu448
I can't vouch for the program itself (I can't imagine that it's incredibly different from most yoga) but it certainly should show you that you CAN do this, with enough determination!
Do you have Netflix? There's a couple of yoga videos on there, and the ones I've done all have someone showing you modified poses if you can't do the full ones.
Edited by: DRAGONCHILDE at: 6/12/2012 (00:10)