Both Mrs. Angus (more of a spring chicken than I) and I have been bothered by post workout soreness. She asked her doctor about it and he recommended milk proteins taken post-exercise.
So she did some research and we've been using a product called "Muscle Milk".
AND IT WORKS!
This stuff is so awesome. I feel much better the day after exercising and can be more active more often.
However it is also highly caloric, so in spite of increased activity, I am gaining weight. I am up to 140 pounds, which is the heaviest I've ever been.
Now maybe the therapeutic value of Muscle Milk is mainly as a placebo; that's fine with me, I'll take help any way I can get it. But the weight gain part is very real.
There is a "lite" version of the product but (a) it's not very lite and (b) it contains less of the treatment (i.e. less milk proteins).
I guess I'll keep using it until I either get too big to do yoga or Mrs. Angus threatens to dump me.