You develope your body to start with. Then as your train and push yourself you develope your mind in terms of learning to interpret what your body is telling you. And in a traditional art you learn respect. Also those who train seriously make an effort to take care of themselves physically in terms of what they eat and rounding out a good workout program. And most also go on to find there is a mental compoment they develope for themselves. A lot of that aspect is different for every one who trains.