Derivation Web

claim_a8293dcbc8614223

by researka:v2 · 2026-05-26 17:22:39.865511+04:00

# Alpha memo — exercise

**Headline:** Exercise: single-source lead signal with broader context receipts
**Alpha triage:** `high` (internal ranking; not a certainty claim)
**Confidence:** `evidence_backed_signal`
**Memo surface:** `alpha memo`
**Snapshot:** `2026-05-16T18-12-38Z`
**Run:** `exercise-evidence-2026-05-16T18-12-38Z`
**Direct source breadth:** `1` direct cited source(s)
**Source thesis:** Pathway-specific anti-inflammatory gating: metformin unlocks TNF-axis suppression in exercise-responsive cancer survivors that exercise alone cannot achieve
**Source breadth:** `5/5` unique cited source(s)

## One-sentence thesis

The direct receipts support a narrow working claim: Compared with control, exercise alone reduced hs-CRP [-30.2%; 95% CI, -50.3, -1.0]; exercise alone reduced hs-CRP and IL6 (-30.9%; 95% CI, -47.3, -9.5). The context receipts provide source breadth and boundary checks, not independent confirmation of the lead claim.

## Why this is surprising

The useful signal is narrower than the topic label: the lead receipts support the core claim, while the added A/B context receipts define where that claim may generalize, fail, or need a separate extraction.

## Evidence receipts

- `fact_id=22116` (`A_core`) — Compared with control, exercise alone reduced hs-CRP [-30.2%; 95% CI, -50.3, -1.0] DOI `10.1158/1940-6207.capr-20-0188`
- `fact_id=22117` (`A_core`) — exercise alone reduced hs-CRP and IL6 (-30.9%; 95% CI, -47.3, -9.5) DOI `10.1158/1940-6207.capr-20-0188`
- `fact_id=22118` (`A_core`) — exercise and metformin reduced sTNFαR2 and IL6 (-38.7%; 95% CI, -52.3, -18.9) DOI `10.1158/1940-6207.capr-20-0188`
- `fact_id=22119` (`A_core`) — exercise and metformin reduced sTNFαR2 (-13.1%; 95% CI, -22.9, -1.0) DOI `10.1158/1940-6207.capr-20-0188`

## Context receipts

- `fact_id=12572` (`A_core`) — Mixed-muscle protein fractional synthetic rate increased by 42% at 3 h postexercise and 69% at 24 h postexercise in CON. DOI `10.1152/ajpendo.00600.2013`
- `fact_id=41245` (`A_core`) — tumor-bearing mice with access to running wheels showed reduced growth of MDA-MB-231 (-66%, P < 0.01) tumors DOI `10.1158/0008-5472.can-16-3125`
- `fact_id=12544` (`A_core`) — Mortality risk was 11% lower (hazard ratio, 0.89; 95% confidence interval, 0.86-0.93; P<0.001) for every 1-MET increase in exercise capacity. DOI `10.1161/hypertensionaha.114.03510`
- `fact_id=30392` (`A_core`) — IGF-I/IGFBP-3 ratio increased significantly in the diet + exercise group (+5.4%, P < 0.01) compared with control. DOI `10.1158/1055-9965.epi-13-0337`

## What this changes

Treat this as a focused working signal, not a broad topic claim. It moves review attention from a generic Top 5 list to the specific contrast, receipt bundle, and next extraction that could confirm or kill the thesis.

## Limitations

- This is an alpha memo, not a settled review, guideline, or broad consensus claim.
- This memo synthesizes cited source receipts; it does not conduct a new meta-analysis or systematic review.
- Interpret the thesis only within the cited receipt bundle and the explicit weakening checks below.
- The core claim rests on 1 direct source paper(s); context receipts broaden the source bundle but are not convergent proof.
- Independent receipts fail to reproduce the claimed contrast.
- The effect depends on one protocol, subgroup, comparator, or extraction artifact.

## What would weaken this

- Independent receipts fail to reproduce the claimed contrast.
- The effect depends on one protocol, subgroup, comparator, or extraction artifact.

## Strongest counter-evidence

- _No A_core/B_context counter-evidence found in this run; treat this as a single-direction signal until a broader receipt expansion finds a real opposing fact._

## Next extraction

- Extract independent A_core/B_context receipts that test the lead contrast directly.
- Audit whether each direct receipt remains comparable on population, endpoint, comparator, and measurement method.
- Run a follow-up pass that either connects each context receipt to the lead claim or splits it into a separate memo.

## Provenance / priority

- **Topic:** `exercise`
- **Author:** Dom Lynch
- **ORCID:** _not configured_
- **Version:** 1.0
- **License:** CC BY-NC 4.0
- **Canonical URL:** _not assigned_
- **Suggested citation:** Dom Lynch. (2026). Exercise: single-source lead signal with broader context receipts. ReseaRka Evidence Index. Version 1.0.
- **Run bundle SHA-256:** `fe487b28cd8297287f8c8def5605a5aac25b0a1723c07436f22dfdaea7dc6374`
- **Memo SHA-256:** `12c36db3312628e59f58153f26a3a4e818cb983d57e130624eff79bc4b43b487`
- **Priority note:** This memo records the first published framing, source bundle, and evidence receipts for this run. Reuse should cite the canonical version.

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  "screening": {
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    "wording": "5 candidate receipts retained after source retrieval, deduplication, and topic filtering. This is an evidence-map screening trace, not a PRISMA full-text exclusion audit."
  },
  "sidecars": [
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      "name": "citation_traces.json",
      "url": "https://api.researka.org/publications/d2507e5a-e8e6-4a30-aa39-33d2478faccc/sidecars/citation_traces.json"
    },
    {
      "name": "claim_graph.json",
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    },
    {
      "name": "contradiction_map.json",
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    {
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    }
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  "sparring_fallback_reason": null,
  "sparring_fallback_used": false,
  "title": "Exercise: single-source lead signal with broader context receipts"
}