Rigid-Sync Tennis Individual Optimization Architecture: Personal Baseline, Normal Range, Breakdown Boundary, and Execution Capability

This Concept Record defines a proposed architecture for applying Rigid-Sync to individual optimization of tennis movement. Rather than beginning from a single universal ideal form, the architecture uses the player’s own demonstrated successful performances to construct a Personal Baseline based on temporal and relative relationships among body segments, racket motion, impact conditions, physical execution capability, situational context, and shot outcomes. The framework distinguishes five principal concepts: Personal Baseline, Normal Range, Acceptable Range, Breakdown Boundary, and Physical Execution Capability. It further separates Relational Structure, Physical Execution Capability, and Outcome, allowing unsuccessful performance to be distinguished from relational movement breakdown. A movement may remain relationally compatible while current strength, stability, mobility, speed, endurance, or other physical capabilities are insufficient for successful execution. Conversely, a previously successful movement may later become unsuccessful because physical state, capability, situational conditions, or relational organization has changed. The architecture therefore treats success and failure as dynamic states rather than permanent labels and supports longitudinal Baseline updating through learning, adaptation, development, decline, recovery, and reorganization. The present record is centered on tennis. The underlying architecture may have extensibility to other domains involving individual-specific or system-specific successful operating ranges. Cross-domain validation is not claimed in this record.