I do understand when throwing a hook to the head the main points to focus on is making sure you have proper positioning, good hip and shoulder torque while keeping the fist to elbow parallel to the ground. My question is Knuckles up or knumb up
Which is better or is one or the other completely wrong... I have seen both thrown, and i have had people say it should be thrown only one way or it can be thrown both ways...

WHICH IS IT?