concentrate on the cardio to keep up your endurance, weight training will deffinetly help as long as you dont try to bulk up. And on the non physical side work on your focus this is where you see the difference between a powerfull blow and a devistating blow. Good luck to you Muay Thai is an awsome form of cardio and stress reliever.
-------------- Never be afraid to try something new. Remember the ark was built by amateurs, The Titanic was built by professionals.