If at all possible, you should consider taking a class with an instructor if you've never done yoga before. Some of the poses can be challenging and a good instructor will teach you how to modify a pose. We all have physical limitations. I've been doing yoga for a while now and there are several poses I am still learning to do.
Now, if you can't afford a class or have access to a gym where you can work with an instructor, one of the better beginner DVD yoga workouts is done by a woman named Peggy Cappy. She works with many elderly people. So, she uses chairs and other props for modifications.
That might be a good option. You can see reviews of her DVDs on amazon.
Edited by: ARCHIMEDESII at: 1/7/2013 (10:52)