fugetsu

Brian-
Thaiboxing is, as you know, punishment for the body. I can advise two things:
First, go to the chiropractor a few times every week. Your spine and joints will get a working over and you will find that a good chiropractor can help you keep training when otherwise you would be totally screwed. I can attest to this personally. First major experience was before the 2001 Oregon Thaicamp. I trained hard and then didn't do a good enough job of taking care of my body after work outs, and totally screwed up my lower back, to the extent that I could barely walk. On the Wednesday before the camp, I went to see the chiropractor, we said that my right leg was 3 cm shorter than my left (because I had messed up my lower back so bad). He adjusted my neck, upper, middle and lower back areas. I went back the next day, he did the same thing again, and on Saturday morning (the first day of camp) I was able to go 100%. So, I have been a regular at that clinic ever since. The chiropractor also can give you certain stretches and the like to prevent your trouble spots from acting up.
Khun Kru Mike Walrath also saw a chiropractor for a number of years while his knee was messed up, and while his knee is still messed up, the chiropractor kept him walking and training when most people would have been flat on their backs.
Second, start yoga. I have not yet done this, but according to reliable sources (Guru Dan Inosanto) it does a lot to maintain body balance and allows you to avoid injuries.
I hope this helps.
Alex Bay