CORE Overview¶
The complete Q-V-ROOT-8-45-Impulse-Jin chain — 12 biomechanical variables in one unified view.
The CORE Chain¶
Q → V → ROOT → F → P → T → SSC → 8 → 45° → BRAKE → PULSE → JIN
Each variable is a link. Break one link, the entire stroke collapses. Master all twelve, and the stroke becomes inevitable.
Variable Index & Deep-Dive Chapters¶
| # | Variable | Name | Focus | Deep-Dive Chapter |
|---|---|---|---|---|
| 1 | Q | Quiet Eye | Fix gaze at the bounce point | Chapter 8: Quiet Eye → |
| 2 | V | Vestibular / VOR | Keep chin fixed, head still | Chapter 9: Vestibular Stability → |
| 3 | ROOT | Rooting | Ground connection, force base | Chapter 18: Rooting → |
| 4 | F | Fascia | Connective tissue network, force transmission | Chapter 10: Fascia → |
| 5 | P | Proprioception | Sense joint position without looking | Chapter 10: Proprioception → |
| 6 | T | Tensegrity | Bones float, myofascia holds | Chapter 11: Tensegrity → |
| 7 | SSC | Stretch-Shortening Cycle | Store and release elastic energy | Chapter 12: Stretch-Shortening → |
| 8 | 8 | Figure-8 | Continuous loop, no stopping point | Chapter 13: Figure-8 Regulation → |
| 9 | 45° | 45° Swing Plane | Oblique plane — drive + spin together | Chapter 14: 45° Swing Plane → |
| 10 | BRAKE | Braking | 1-inch stop creates impulse | Chapter 15: Braking & Impulse → |
| 11 | PULSE | Pulse / Fa Jin | 1-inch push through the stop | Chapter 15: Pulse → |
| 12 | JIN | Jin / Kình | Listen-Transform-Release. Internal power. | Chapter 16: Jin → |
The CORE Equation (Operational Subset)¶
CORE = Q + V + ROOT + 8 + BRAKE + PULSE
CORE is the operational subset — the six variables you actively manage on every shot.
| Variable | Role in CORE |
|---|---|
| Q | Locks the external target |
| V | Keeps the platform stable |
| ROOT | Anchors the kinetic chain |
| 8 | Guarantees no pause (SSC) |
| BRAKE | Creates the impulse |
| PULSE | Releases the energy |
F, P, T, SSC, 45°, JIN are the foundation — built in training, expressed in CORE.
The Three Zones¶
| Zone | Variables | Training Focus |
|---|---|---|
| Input | Q, V, ROOT | Setup, eyes, feet, head |
| Process | F, P, T, SSC, 8, 45° | Chain integrity, chain regulation |
| Output | BRAKE, PULSE, JIN | Release, impulse, expression |
Quick Diagnostic¶
| Symptom | Broken Link | Fix |
|---|---|---|
| Late contact, shanks | Q | Park eyes at bounce |
| Head lifts, face opens | V | Chin tucked, eyes parked |
| No power, falling back | ROOT | Screw feet, lift arch |
| Arm-only, elbow pain | F/P | Feel spiral/back line stretch |
| Muscled swing, no whip | T/SSC | Loose takeback, no pause |
| Big takeback, late | 8 | Small 8, continuous |
| Flat, no margin | 45° | Back pocket → far shoulder |
| Pushy, no penetration | BRAKE | Front leg stomp, torso stop |
| Inconsistent under pressure | JIN | Ting → Hua → Fa |
The CORE Loop (Per Shot)¶
1. Q: Eyes park on contact zone at opponent's contact
2. V: Head still, chin tucked through swing
3. ROOT: Back foot screws → front foot braces
4. 8: Continuous figure-8, no pause at top
5. BRAKE: Front leg/hip stops hard
6. PULSE: One-inch push through contact
7. JIN: Feel → Absorb → Release
All six in under 1 second. Automatic. Trained.
Next Steps¶
| Action | Link |
|---|---|
| Deep-dive each variable | Variables Index → |
| Find your broken link | Diagnostics → |
| See the visual map | Visual Library → |
| Train the chain | Drills Library → |