you dont just increace lung capacity, your body also gets more efficent at using oxygen. I cant do much cardio at all or i lose wieght :( I do Brizillian Jujitsu for cardo witch isn't to intense, but i miss the awsome cardio abillity i had in boxing.
however I can't get over 170lbs and matain that kind of cardio wich sucks. but in MMA more strength is better anyways.
