I know this seems like a really basic question, but I want to see how everyone else prefers it. When I took TKD when I was younger, I was taught to kick with the instep/top foot portion, however, I have read in some places that the ball of the foot should be used, and I have sometimes seen my instructor use the ball of his foot, even though he tells us instep. He doesn't correct me when I use the instep, but doesn't correct others who use the ball of the foot. When sparring with the feet covered, pulling the toes back is out of the question, and I would say the same with shoes on. I broke a toe with a front kick (it was a no contact sparing drill and the guy I was doing it with came at me instead of moving back like he was supposed to) and I hate cranking the toes back to do a kick. I could see, however, when having to break a board for example, using the ball of the foot would probably be a good idea. What technique do you all use?