I did judo when younger, freestyle wrestling in highschool, Shidokan Karate for several years coupled with Thai boxing in college, and then tai chi. At the same time I was a competitive bodybuilder in Missouri and Chicago, natural contests, BTW. I could hold my own I suppose, but I was testing for a belt at my shidokan school and was knocked out, literally, by a woman my age who was the femal Chicago golden glves boxing champion.

I miss the intensity of it all, and the cardio factor. I can still throw some weight around in the gym but when it comes to fighting or sparring I know better, I just don't have the wind for it. Every once in a while I think I'd like to go back and may. The isreali style is very effective. I've seen it in action afew times. Here's my old teacher:

http://www.odekake.us/ad_shidokan.htm

He's in the bottom left hand side of the page.