You beat me to it Thats exactly what I was going to say. I believe the phrase is 'Horses for courses'... ie it depends on what you are trying to do as to how you do it We practise the sokuto (side edge of the foot) version occasionaly so we can do it easily, but most of the time we stick with the kakato (heel) version. I've never heard of using the ball of the foot though - I would have thought this would cause damage to the ankle! As far as I was aware the sokuto version is not a Shotokan kick as such... I've seen it in Wado Ryu though instead of the kakato version. Andy. Many do front kicks with the ball of the foot with no damage to the ankle it is the same with a properly executed side kick using the ball of the foot.