Originally Posted by Ironpalm

Yes the ball and the heel both. The toe kicks are really nice when wearing combat boots. What I am referring to is the difference between kicking that was done through the 1960's as compared to the kicking techniques of the 21st century.
"The kicks used these days come in numerous variations and are marked by flashy combinations and acrobatic spins. The practitioners of yesteryear were limited to 4 kicks--the roundhouse kick, front kick, side kick, and back turning kick--all of which were executed in a relatively linear fashion."
"A prime example of the trend toward reduced emphasis on power is the roundhouse kick. Today, TKD students strike almost exclusiively with their instep. While their mid-20th century counterparts use the ball of the foot. To understand why they were so adamant about making contact with the harder, less sensitive portion of their sole, try roundhousing a hard object with your instep. Pain, as they say, is the best teacher" -- Hee-ll Cho