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¶
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 |
Visual Library¶
150+ custom diagrams and photos across all chapters:
- Infographics: CORE loop, tensegrity tent, figure-8 paths
- Biomechanical: 3D contact zones, kinetic chains, force vectors
- Photos: Grip comparisons, contact points, footwork sequences
- Diagnostics: Fault trees, fault-signal cards, self-check tools
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.
About the Author¶
Henry Pham Duc
- 20+ years tennis + Tai Chi integration
- Creator: Q-V-ROOT-8-45-Impulse-Jin CORE System
- Author: Unified Tennis Handbook (30 chapters, 150+ diagrams)
- Mission: Replace "tips" with biomechanical truth
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?
Connect¶
- GitHub: github.com/henryphamduc
- LinkedIn: linkedin.com/in/henryphamduc
- YouTube: youtube.com/@henryphamduc
- Email: henry@tenniskb.com
Built with MkDocs Material • Hosted on GitHub Pages • View source