: Your tendons—especially the massive Achilles tendon —act like high-tension springs. They don't just stay still; they deform and stretch, soaking up kinetic energy and storing it as elastic potential energy . Chapter 2: The Crossroads (The Amortization Phase)
The story begins with a drop. As you fall toward the ground, gravity pulls on your mass, and your body prepares to catch it. 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. they deform and stretch