according to the traditional theory, if the student makes contact constantly, it will be difficult to control his actions when he needs. but if he always makes continuous use of control, he can easily hit when he needs. if the student constantly makes contact during free fight, his mind will become wild. but if the student makes continuous use of controlled fight, his mind will become more controlled. both states of mind can spread over his life outside of class. because full contact is not allowed, the students have no need to use strong protectors (things that protect). using boxing gloves and thick feet protectors leads them to hit strongly. and when they hit while wearing such things, they does not feel whether their technique is correct. in order to avoid this problem, the traditional masters should make a choice the light protectors of fists and of insteps. they suffice to prevent injury when the contact accidentally occurs.