Timing is as important to the fighter as it is to a musician, or a dancer. Proper timing does not come naturally or easily. It develops slowly over time. For the fighter, it determines not only when to move and when to punch, but how the fighter’s muscles move in sequence to deliver power to a punch. A punch that is delivered without smooth synchronized muscle timing is weak and powerless. Trainers refer to it as Kinetic-Linking, how muscles move in sequence to transfer energy and power from the feet up through the legs, torso, shoulder, and arms to the fist, but the key to Kinetic-Linking is Timing. The key to developing good timing is in sparring and repetition. Sparring helps the fighter develop timing in movement. Practicing each punch over and over again on the heavy bag helps develop the timing of a punch. Timing improves with repetition. Eventually, as a fighter's timing becomes engrained within his every move, he develops rhythm. His body becomes a symphony of movement, wherein all of his instruments play in unison. It is Poetry-in-Motion. It is The Art of Boxing.