About TennisKB¶
TennisKB (Tennis Knowledge Base) is the online home of the Q-V-ROOT-8-45-Impulse-Jin System — the complete biomechanical framework for tennis.
What This Is¶
A complete, open-access knowledge base for the tennis system developed by Henry Pham Duc over 20+ years of research, coaching, and Tai Chi integration.
What You'll Find Here¶
| Section | Content |
|---|---|
| System | All 12 variables (Q, V, ROOT, F, P, T, SSC, 8, 45°, BRAKE, PULSE, JIN) |
| Strokes | All 5 strokes broken down through the system (FH, 1HBH, 2HBH, Serve, Return) |
| Patterns | Singles tactics, doubles systems, court geometry |
| Mental | Pre-point routine, Quiet Eye under pressure, visualization |
| Physical | Tennis-specific fitness, periodization |
| Resources | 150+ diagrams, self-diagnostics, drills library, AI Coach |
The System in One Line¶
Q → V → ROOT → F → P → T → SSC → 8 → 45° → BRAKE → PULSE → JIN
12 variables. One chain. Every stroke.
The Book Behind the Site¶
This site is the digital companion to the Unified Tennis Handbook (30 chapters, 150+ diagrams):
| Part | Chapters | Focus |
|---|---|---|
| I: Foundation | 1-7 | Problem, Grip, Contact Point, Face Angle, Takeback, Tension, CORE |
| II: Sensory-Motor | 8-11 | Quiet Eye, Vestibular, Fascia/Proprioception, Tensegrity |
| III: Engine | 12-15 | SSC, Figure-8, 45° Plane, Brake & Pulse |
| IV: Expression | 16-18 | Jin, Hu Thuc, Rooting |
| V: Strokes | 19-25 | Forehand, 1HBH, 2HBH, Serve, Return, Volley, Touch |
| VI: Strategy | 26-27 | Court Geometry, Patterns |
| VII: Complete | 28-30 | Mental, Physical, Unified System |
Who This Is For¶
| You Are... | Start Here |
|---|---|
| Player | Start Here → → Diagnostics |
| Coach | System Overview → Visual Library |
| Researcher | System Index → Chapter Deep-Dives |
| New to the system | Start Here → |
The Philosophy¶
The court doesn't lie. The ball doesn't care about your intentions. It only responds to physics. This system makes physics work for you.
License & Usage¶
This knowledge base is free to access for personal learning and coaching reference.
- ✅ Read, study, reference in your coaching
- ✅ Share links with players and coaches
- ✅ Use diagnostics and drills in your practice
- ❌ Do not repackage and sell as your own
- ❌ Do not remove attribution required for commercial use
Contributing¶
Found an error? Have a suggestion? Want to contribute a translation?
Open an issue or submit a PR.