The body should take instructions tough. Reacting quickly to somebody's else actions (a ping pong match, a very contested overtake in motorsport) can be totally unconscious but we must have consciously decided at least the general way of performing those activities: the guy on the car ahead suddenly steers left so I'm feinting right than go left again. Or fencing, or riding a horse in a race. Training could prepare the body to handle any action on autopilot but consciousness has a short leash on it.