I circuit train because, for what I want to achieve, it's the best type of exercise. My class is the 'milxtreme' military training circuits at the world famous Rooney's gym in London. Classes vary, but more or less it's similiar to crossfit...we also do lots of other stuff based on gym Mark Twight's method. Basically, tons of pullups, pushups, squats, rings, kettle bells, etc. It shreds body fat like a motherfucker and builds lean muscle. Your stamina goes through the roof, too. I used to train in San Diego at Undisputed (downtown) and it was awesome. I stopped doing Muay Thai (sadly) here and regular boxing too, because the classes were just too easy. The new program I've been doing is great. Anyone else train in a similiar manner? Gone are the days of old fashioned body building training. Circuit training is superior for overall fitness.