If you're willing to take a little time to read, and spend about $20.00 for the book, I'd recommend "Power Yoga"by Beryl Bender Birch. Available at any bookstore chain, or internet store/ ISBN #0-02-058351-6.

I got into it a few years ago, as a rehab, after a series of small injuries sidlined me. Whenever I need to ease back into exercising I use Yoga as a warmup. You can do as little, or as much as you feel like/need. BTW, this ain't twist-yourself-into-a-pretzel yoga. It can be a very physically taxing muscle building routine, if you so choose. Follow chapter 2 and you'll find yourself working up a sweat while standing perfectly still (really!!!).

Enjoy