I am doing a martial arts program that is about 75% Muay Thai, 25% other stuff. Yes, martial arts is great. I also do a cardio kickboxing class at the same studio.

Don't let those pecs get overdeveloped to the point of imbalance though. Read about my experience here:
http://forum.lowcarber.org/showthre...289#post1626289

Read about the solution to my problem here:
http://www.aafp.org/afp/20030315/1315ph.html