Quick Reaction: Increase reflexes. In unexpected situations, the body would be able to dodge and counterattack without conscious commands from the brain. This ability complements flexibility, intuition, and hand-eye coordination.
There was not much to say about the improved body movement.
As for the quick reaction, it was just an upgraded version of conditional reflex.
Most people had experience in having conditional reflex.
For example, when a person does a certain action repeatedly, their brains would immediately respond in a certain way when encountering the same situation and do the corresponding action.
It was just like how a soldier in combat would immediately respond by lying on the ground when they hear gunfire and then inspect their surroundings.