This link is to a number of short articles so will share it with you because I've been doing a little yoga for a long time & have to say that my back, overall flexibility etc. is no where near as stiff as long as I keep it up. Over in our links section on the last page, there are links to a number of good sites and a variety of articles for any who might be interested. My chiro gave me some sheets of stretching excercises to do and quite a few are like the yoga ones I've found most helpful. So happy stretching !