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SSC - Stretch-Shortening Cycle

The Engine.

The Three Phases

Phase Name Duration Key
1 Eccentric Variable Load
2 Amortization < 200ms Switch
3 Concentric Explosive Release

The Rule

Pause > 200ms = Energy lost as heat. Smooth < 200ms = Free power.

The Three SSC Chains

Forehand Push (3 in series)

SSC # Location Eccentric Load Concentric Release
1 Legs Knee bend β†’ extend Ground force up
2 Torso Chest coils β†’ uncoils Torso whip
3 Forearm Wrist lays back β†’ snaps Wrist snap

Backhand Saber (2 in series)

SSC # Location Eccentric Load Concentric Release
1 Lat/Back Line High elbow β†’ stretch Lat pulls elbow down
2 Tricep/Fascia Elbow flex β†’ extend Edge snaps through

The Amortization Curve

Energy Retained
100% |●
  70% |  ●
  30% |    ●
   0% |______●______
       0   100  200  300ms
Amortization Energy Feel
0ms (continuous) 100% Effortless whip
50-100ms ~70% Good, slight loss
150-200ms ~30% Muscle doing work
>200ms (pause) ~0% Heavy, muscled

The Rule

Stretch flows directly into shorten. No pause. The crossover of the Figure-8 IS the amortization phase.

The Drill

"Bounce-Drop-Push"

  1. Drop ball, let it bounce
  2. Constraint: Racket moving forward BEFORE ball reaches peak
  3. Forces short amortization
  4. Wait for peak β†’ you've paused β†’ no SSC

20 reps. Feel the continuous stretch-snap.

The Cue

"Stretch. No pause. Snap."