I am in agreement with sensei8 here. Rechambering (recoiling) your kick when appropriate redirects your energy back into a stable & balanced base and allows for faster "re"kick. Some kicks rely on the recoil timed correctly to produce their maximum effect-such as hook kick, push kick, and turning kick. I liken this to slapping drills (for learning to fall properly)....if you leave you hand on the mat, energy returns to it and creates an undesirable effect in your hand/arm/body however if you slap and quickly remove your hand (recoil), the energy is completely transferred into the target (the mat in this case). A more efficient transfer of energy =more power going into the target.