On differences between bio-mechanics used in boxing vs Taekwondo punching:
"It is not so much where you chamber as much as
what part you mainly use to generate power from
(shoulders or hips) and what you do with your feet meanwhile.
Often the differences between boxing punches and taekwondo punches is said to be boxing punches from the guard and Taekwondo from the hips but that is really a big simplification. The real difference is as Simon says in such a short quote much more to do with structure, and where you are generating power from. Obviously boxing also uses their hips, but they rely a lot more on shoulders for power generation than in taekwondo basic technique.