{
  "study_id": "STUDY-000A",
  "title": "Six-Year Longitudinal Adaptation Under Altered Biomechanics",
  "created": "2026-06-08 23:06:58",
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  "status": "flagship_synthesis_complete",
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  "headline_findings": [
    "The six-year record shows ecological reconfiguration, not just faster running.",
    "The most intense restructuring occurred in Indoor Pivot And High-Resolution Adaptation, where indoor share averaged 64.7%.",
    "Pace changed -29.99%, cadence changed 21.15%, and stride length changed 12.24% in the QC-pass high-resolution window.",
    "Pace tracked cadence more strongly (r=-0.9231) than stride length (r=-0.8205); cadence accounted for 62.4% of the cadence-stride speed gain.",
    "The late high-resolution window was 100.0% treadmill, showing that the strongest adaptation signal emerged in a specialized treadmill-dominant context.",
    "By 2026, running accounted for 84.2% of structured hours, showing a major shift back toward running dominance.",
    "Some movement features remained comparatively more conserved than the main adaptation variables."
  ],
  "branch_study_targets": [
    "Physiological cost under altered mechanics",
    "Fueling, recovery, and performance overlap",
    "Comparator study versus normative or matched external profiles"
  ]
}