# Study 000D Limitations

- This remains an `n=1` longitudinal study program.
- The study compares adaptation signatures inside one corrected dataset; it does not embed an external normative comparison cohort.
- The higher-demand probe work still uses treadmill versus outdoor as a practical proxy, not a full stabilization-demand ladder.
- The burden layer remains descriptive rather than experimentally causal.
- This study is only as strong as the completed upstream packages it uses, although those packages were already audited and `000C` served as the corrected full-data pass.
- The study answers which adaptation signature fits better within this dataset. It does not prove a universal rule for all altered-mechanics systems.