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📐 Angle Atlas

Welcome to the Angle Atlas — exploring the angles, springs, neurology, and sensors behind every stroke.

📚 Deep Dives — 7 Parts

  1. DD1: The Angle Atlas — Joint angles at contact, why geometry determines stroke quality
  2. DD2: Joints as Springs — Joints as springs: energy storage and release
  3. DD3: Neurological Foundation — Neurological foundation of motor control
  4. DD4: Muscle Hierarchy — Muscle hierarchy: big muscles first, small muscles after
  5. DD5: Skeletal Architecture & Connective Tissue — Skeletal architecture: the framework for movement
  6. DD6: The 50+ Body — The 50+ body: adaptation and optimization
  7. DD7: The Sensor System — The sensor system: proprioception, vestibular, visual


© 2026 Henry Pham Duc · Tennis Future Lab