Those who practice the martial arts are taught to gain
complete control over every part of their body. This not only
helps them execute stunning offensive maneuvers, but also gives
them the edge defensively. When any physical attack comes into
contact with the body of the martial artist, he is able to 
instantly shift his weight and movement, to allow a portion
of the attacking energy to be deflected. This is simply a much
more effective way to 'roll' with a punch.