To grasp why this movement breaks visual intuition, one must examine the rate of force development (RFD). Traditional heavy bench pressing allows an athlete between 300 and 500 milliseconds to develop peak muscular tension against a barbell. High-velocity plyometric push-ups give the lifter less than half that time.
This rapid turnaround hinges entirely on the recruitment of Type IIx fast-twitch muscle fibers. These specialized fibers contract rapidly and fatigue quickly, burning phosphocreatine reserves to produce massive bursts of velocity. Concurrently, the neuromuscular system activates the stretch-shortening cycle (SSC). When the chest descends swiftly into the hole, the muscle spindles inside the pecs detect a rapid stretch and trigger an involuntary myotatic reflex. This reflexive contraction overlays on top of voluntary effort, creating an explosive mechanical spring effect that catapults the torso upward.
