FearlessFreep
Senior Master
Me: I would debate that : ) Speed wise they seem about the same. Actually I think the sidekick launches a little faster because you don't have to lift the foot as high before you drive it outward
Bro John: That's assuming the stance you are in is already "Side-facing". Many styles don't begin that way, but employ a more "front-facing" stance. Like the art I practice...it begins MUCH more "Front-facing" than TKD.
Actually. I'm not assuming that. As I had mentioned, we practice sidekicks from walking stance and forward extended stance which are both stances with squared shoulders and hips (in fact, the Taeguek form 'Sa-Jang' has two sidekicks in sequence, the first one from a forward extended stance, so to throw them together you have to be able to throw them from a forward position, not a side position).
Both kicks involve lifting the foot to thigh level and then thrusting out. Done properly, the foot travels in a constant arc, up and then out, without a pause at the top. The hip and foot turning motion gives the sidekick forward moving power, but it happens in conjunction with the foot motion so it really doesn't add any time.
The reason I mentioned that the sidekick may be faster was because of thinking that the push kick involves a higher lift so it may take more time to get the foot up before you send it out, but that's probably variable depending on how high you lift
The front push kick is mechanically simpler so for many people it's probably easier to do and as a result, faster, but I think mechanically it works out about the same.