# Study 000C Abstract

This exhaustive full-data program analysis was conducted after completion of `Study 000A`, `Study 000B`, `Microstudy A`, `Microstudy B`, and the full-system audit. Its purpose was to test whether the corrected full dataset overturned any of the major program claims or instead sharpened them.

Using bundled flagship outputs, microstudy outputs, yearly ecology tables, and the raw-summary hybrid-cardio audit, the study evaluated claim stability, corrected conditioning ecology, hybrid-session placement within flagship windows, and temporal separation between later outdoor probe runs and later hybrid cardio blocks.

The corrected full-data pass did not overturn the core running findings. The flagship adaptation pattern remained phase-structured, turnover-led, and selectively rather than uniformly remodeled. Cadence still accounted for `62.42%` of cadence-stride speed gain, while `vertical_ratio_pct` remained the lowest-variability candidate at `2.14%` monthly CV and `vertical_oscillation_cm` remained the lowest-variability direct mechanics candidate at `4.19%`.

The biggest new content was ecological. The audit found `18` plausible GPS-bearing `indoor_cardio` sessions and `4` plausible GPS-bearing `strength_training` sessions. The early flagship window contained `7` hybrid indoor-cardio sessions totaling `9.45` miles and `4.99` hours, while the late flagship window contained `0`. In yearly corrected ecology, hybrid GPS cardio accounted for `4.20%` of 2025 indoor-conditioning hours and `26.34%` of 2026 indoor-conditioning hours, though the 2026 block ended on `2026-01-30` and sat `69` to `109` days away from the later outdoor probe runs.

The strongest corrected conclusion is therefore narrower and stronger at the same time: the program supports selective adaptation through corrected ecological narrowing into later stabilized running specialization, with turnover preserved more successfully than stride expression and with mixed internal cost rather than pure economy.



# Study 000C Methods

## Program question

After exhausting the corrected full dataset, what survives unchanged, what must be refined, and what stronger final program conclusion is actually supported?

## Inputs

This package reads only from bundled source tables copied from the current canonical study ecosystem and the full-system audit:

- `Study 000A` yearly overview, phase model, mechanics contrast, decomposition, variability rank, and window context
- `Study 000B` window summaries and specialization correlations
- `Microstudy A` surface summary and anchor-context tables
- `Microstudy B` outdoor cases, sign tests, and adjacent-dynamics summaries
- `Study 000AB` bridge findings, evidence ladder, and consistency audit
- `Program Audit` hybrid-cardio candidates, monthly hybrid summary, window-overlap table, and impact matrix
- yearly ecology table from the current Stage 5 main

## Exhaustive checks performed

1. Yearly ecology was recalculated into a corrected ecology summary by adding GPS-bearing hybrid-cardio counts, hours, and miles by year.
2. The early and late flagship windows were re-evaluated against the hybrid-cardio audit layer.
3. The later Microstudy B outdoor probes were checked against the later hybrid-cardio block to determine temporal separation rather than assuming contamination or no contamination.
4. A claim-stability matrix was built to test which major program claims were retained, refined, corrected, or cleared.
5. A final full-program model was then written only after the corrected ecology and separation checks were complete.

## Interpretation rules

This study treats the running-specific mechanics findings as valid unless the exhaustive cross-check reveals direct contradictory source evidence. It treats ecology claims more cautiously, because Garmin label taxonomy can collapse outdoor hybrid conditioning into `indoor_cardio`. As in the earlier packages, all conclusions remain descriptive rather than mechanistic proof.



# Study 000C Results

## Summary

The exhaustive full-data pass supports a clear result:

- the core running findings remain intact
- the ecology interpretation becomes more precise
- the later running-specialization story survives full correction
- the hybrid-cardio layer changes context, not the running-only mechanics conclusions

## Corrected yearly ecology

| year | running_count | indoor_conditioning_count | running_share_of_structured_hours | indoor_share_of_structured_hours | hybrid_indoor_cardio_count | hybrid_indoor_cardio_hours | hybrid_indoor_cardio_pct_of_indoor_hours |
|---|---|---|---|---|---|---|---|
| 2025 | 131 | 217 | 21.00 | 63.64 | 13 | 10.18 | 4.20 |
| 2026 | 120 | 19 | 84.18 | 11.38 | 5 | 3.09 | 26.34 |

The corrected ecology changes what can be said about the conditioning system:

- 2025 still reads as a Garmin-labeled conditioning-heavy year
- but only `4.20%` of those indoor-conditioning hours were GPS-bearing hybrid cardio
- 2026 has much less indoor-conditioning overall, but `26.34%` of its indoor-conditioning hours were GPS-bearing hybrid cardio

So the Garmin indoor label is imperfect in both years, but the scale and placement of that imperfection are not the same.

## Hybrid cardio inside the flagship windows

| window_label | hybrid_session_count | hybrid_total_distance_miles | hybrid_total_duration_hours | hybrid_type_counts |
|---|---|---|---|---|
| study000a_000b_early_window | 7 | 9.4458 | 4.9936 | indoor_cardio:7 |
| study000a_000b_late_window | 0 | 0 | 0 |  |
| microstudy_b_later_outdoor_phase | 5 | 4.8749 | 3.086 | indoor_cardio:5 |

This is the most important corrected-context result:

- the early flagship window contained `7` hybrid indoor-cardio sessions totaling `9.45` miles and `4.99` hours
- the late flagship window contained `0`
- the later Microstudy B phase contained `5` hybrid indoor-cardio sessions, but all of them occurred in January 2026

## Separation of later outdoor probes from the later hybrid-cardio block

| outdoor_probe_date | hr_residual_bpm | nearest_hybrid_cardio_date | nearest_hybrid_gap_days |
|---|---|---|---|
| 2025-10-02 | 12.0 | 2026-01-19 | 109 |
| 2025-10-08 | 18.06 | 2026-01-19 | 103 |
| 2025-10-09 | 12.6 | 2026-01-19 | 102 |
| 2025-10-10 | 20.59 | 2026-01-19 | 101 |
| 2026-04-09 | 0.1 | 2026-01-30 | 69 |

This check clears a major possible hole. The later outdoor probe runs are not sitting directly on top of the later hybrid-cardio block. They are `69` to `109` days away from it. That means the outdoor running probes remain interpretable as running probes rather than immediate hybrid-circuit artifacts.

## Claim stability matrix

| claim_id | claim_label | full_data_result | status | implication |
|---|---|---|---|---|
| C1 | Phase-Structured Adaptation | Retained | stable | The phase model survives full-data audit unchanged. |
| C2 | Turnover-Led Gain | Retained | stable | Cadence remains the stronger accessible lever across stabilized and higher-demand contexts. |
| C3 | Conserved Mechanics | Retained | stable | Comparatively anchored mechanics survive context expansion. |
| C4 | Later Running Stabilization Resource | Retained but narrowed | refined | The claim applies most directly to later running specialization, not to the whole conditioning ecology. |
| C5 | Mixed Internal Cost | Retained | stable | Efficiency improved while unexplained session-level burden persisted. |
| C6 | Uniformly Indoor Early Ecology | Rejected | corrected | The early flagship window included GPS-bearing hybrid outdoor conditioning hidden under indoor_cardio labels. |
| C7 | Microstudy B Directly Confounded By Hybrid Cardio | Not supported | cleared | Later outdoor probe runs are 69 to 109 days away from the later hybrid cardio block and remain interpretable as running-only probes. |

The full-data pass found only one genuinely corrected claim:

- the early conditioning ecology was not uniformly indoor

It did **not** overturn the main running findings:

- phase-structured adaptation remains
- cadence still carries `62.42%` of the cadence-stride speed gain
- `vertical_ratio_pct` still has the lowest monthly variability at `2.14%`
- later specialized outdoor cadence remains `5/5` above expected (`p = 0.03125`)
- later specialized outdoor stride remains `5/5` below expected (`p = 0.03125`)
- later specialized outdoor vertical ratio remains `5/5` above expected (`p = 0.03125`)
- later specialized outdoor vertical oscillation residual remains `-0.3111` and later specialized outdoor GCT residual remains `-19.3198`

## Strongest full-data answer

The strongest complete answer after exhausting the corrected dataset is:

`the program supports selective adaptation through corrected ecological narrowing into later stabilized running specialization, with turnover preserved more successfully than stride expression and with mixed internal cost rather than pure economy`



# Study 000C Discussion

## What changed after exhaustive correction

The most important thing about this full-data pass is what **did not** collapse.

The program still supports:

- phase-structured adaptation
- selective rather than uniform remodeling
- turnover as the more accessible running lever
- mixed internal cost

What changed is the ecology precision.

Earlier packages could be read too quickly as though the non-running ecology in the early flagship window were simply "indoor conditioning." The exhaustive raw-summary cross-reference shows that this is too blunt. The Garmin `indoor_cardio` label hid a meaningful outdoor hybrid-conditioning layer, especially in `2025-05` and `2025-06`.

## Why that refinement strengthens rather than weakens the program

This correction does not weaken the running claims. It improves them.

It tells us that the strongest stabilization-resource claim should be read more precisely as:

`later running specialization narrowed into a lower stabilization-demand running context`

not:

`the entire conditioning ecology became indoor and stable`

That is a better statement because it is both more conservative and more accurate.

## What the complete program now says

The corrected program can now be read in a tighter order:

1. The full system reorganized repeatedly across six years.
2. The broader conditioning ecology included hidden outdoor hybrid work.
3. The later flagship running window nevertheless narrowed into a cleaner treadmill-dominant specialization context.
4. Inside that running context, speed gain was assembled mainly through cadence rather than large stride expansion.
5. Under higher-demand running probes, cadence stayed more preservable than stride expression.
6. Internal cost improved in some ways, but not enough to erase unexplained session-level burden.

That is a stronger full-data story than any earlier package could make alone.

## Most important complete-program conclusion

If the whole corrected dataset is forced to say one thing as clearly as possible, it is this:

`adaptation did not occur by making the system uniformly more normal. It occurred by narrowing the ecology, selecting a more manageable running context, preserving the most accessible mechanical lever, and tolerating a mixed cost profile`



# Study 000C Limitations

1. This remains a single-subject program.
2. The hybrid-cardio audit is based on summarized Garmin activity fields rather than full within-session trace reconstruction.
3. Garmin label taxonomy remains imperfect, which is why the correction was needed in the first place.
4. The program still cannot prove exact physiological or tissue-level mechanism.
5. This study corrects and tightens the program, but it does not create an external comparator cohort.