: As your quads and calves lengthen to absorb the impact, specialized sensory receptors called muscle spindles act as tripwires. They sense the rapid stretch and immediately send an urgent signal to your spinal cord: "We're stretching too fast—contract now!" .
This is the "story" of a single jump, told from the perspective of the anatomical systems working inside you to turn gravity into explosive power. Chapter 1: The Descent (The Eccentric Phase) Plyometric anatomy
This is the most critical split-second in the story—the moment your downward movement stops but your upward movement hasn't yet begun. : As your quads and calves lengthen to
Now, the stored energy is unleashed in a massive, coordinated strike. CURRENT CONCEPTS OF PLYOMETRIC EXERCISE - PMC Plyometric anatomy