# Study 000E Manuscript

## Title

Burden Outside The Narrowed Successful Context In A Six-Year Altered-Mechanics Running Program

## Core Question

Does session-level burden rise when the system is pushed outside its narrowed successful running context?

## Short Answer

Yes.

The later outside-context probes carried higher session-level burden than both the late narrowed-context mean and the local stabilized reference context.

## Program Role

This study follows directly from `Study 000D`.

`000D` answered what kind of adaptation the archive supports:

- selective expression rather than broad normalization

`000E` asks the next question created by that answer:

- what happens internally when the system is forced outside that narrowed successful context?

## Operational Framing

The narrowed successful context is defined here as the later stabilized running context described in `000B`, `000C`, and `000D`.

The outside-context probes are the later specialized runs isolated in `Microstudy B`, with outdoor expression serving as the current operational test case rather than the conceptual endpoint.

This study therefore tests `session-level burden under context departure`, not all possible forms of burden.

## Methods

This package uses:

- `Study 000B` early and late window summary
- `Microstudy B` outdoor case table
- `Microstudy B` treadmill HR expectation model
- `Study 000C` later probe hybrid separation table
- the run-level source table from `000A`
- the day-level source table from `000A`

The burden question was tested three ways:

1. compare later outside-context probe HR residuals to the late narrowed-context mean
2. compare each later outside-context probe to matched treadmill runs within `+/- 0.10 m/s`
3. inspect next-day recovery context descriptively without overclaiming it

## Results

### 1. Outside-context session burden was higher than the late narrowed-context mean

`Study 000B` showed:

- early QC mean HR residual: `-1.60 bpm`
- late QC mean HR residual: `3.09 bpm`

This study shows:

- later specialized outdoor mean HR residual: `12.67 bpm`

So the outside-context burden was:

- `9.58 bpm` above the late narrowed-context mean
- `14.27 bpm` above the early window mean

All later specialized outdoor probes were positive for HR residual burden:

- `5/5` positive
- one-sided sign test `p = 0.03125`

### 2. Outside-context burden was also higher than the local stabilized reference context

For each later outside-context probe, matched treadmill runs were identified within `+/- 0.10 m/s` to represent the local stabilized running reference context.

Across the `5` later probes:

- outdoor minus matched treadmill mean HR difference: positive in `4/5`
- mean outdoor-minus-matched-treadmill HR: `10.50 bpm`
- one-sided sign test `p = 0.1875`

This is still useful because it shows a positive mean burden difference relative to local stabilized reference context at similar speed, but it is not as uniform as the model-based residual signal. The strongest answer in this study therefore rests on the residual-burden result first, with the local treadmill comparison acting as supportive methodology rather than as the study's main conceptual frame.

### 3. The hybrid-cardio confound remained cleared

`Study 000C` showed that the later outdoor probe dates were `69` to `109` days away from the later hybrid-cardio block.

That means the later outside-context burden probes remain interpretable as running probes rather than immediate hybrid-circuit artifacts.

### 4. Next-day recovery did not produce a comparably clean answer

Next-day rows were inspected for:

- resting heart rate
- sleep score
- HRV

But the October probe block contains consecutive run days, which makes next-day interpretation much less clean than the session-level burden result.

So the strongest answer in this package is about `session-level burden`, not a proven next-day recovery collapse.

## Primary Conclusion

The strongest supported reading is:

`session-level burden rises when the system is forced outside its narrowed successful running context`

This does not mean every form of burden is proven to rise equally.
It means the session-level cardiovascular burden signal becomes materially larger outside the narrowed successful context.

## What This Study Adds

`000D` said the system adapted through selective expression.

`000E` now shows one of the costs of that arrangement:

`the narrowed successful context appears to protect session-level burden, and leaving that context raises it`

That is the real contribution of `000E`.
The study should not be read as a treadmill-versus-outdoor result.
It should be read as a successful-context versus outside-successful-context result, with treadmill and outdoor acting as the present test implementation.

## What This Study Cannot Prove

- exact physiology mechanism
- whether next-day recovery burden rises as cleanly as session burden
- whether the same result would hold across a full graded stabilization-demand ladder
- universal generalization beyond this dataset
- a claim that treadmill versus outdoor is itself the main scientific point

## Bottom Line

Within this program, the data supports a strong burden result:

`outside the narrowed successful context, session-level burden rises`