Tae Kwon Do is known for it's kicking skills. A lot of people will watch Olympic style TKD and criticize and laugh. But let me tell you this, it is hard as hell to kick spar for 3 rounds focusing on kicking. If you ever get the chance go and try it with a National level player and you will be in for a rude awakening. The cardio alone will kill you and the ability for a skilled practioneer to move in and out and kick you will suprise you.