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BRS6-FM3-PM6 — Sympathetic Activation & Parasympathetic Recovery​

Stage 2B draft — not approved. Independent Stage 2A/2B preview. Canonical science, mappings, ratings and review status are unchanged.

1. Mission & Overview​

Mission​

Maintain autonomic flexibility by shifting cleanly from sympathetic activation back into parasympathetic recovery.

Intervention Dominance: Lifestyle-Dominant — System Optimisation Practices

Inherited qualification requires final scientific approval. Biological requirements alone do not establish responsiveness or comparative dominance. No head-to-head comparative supremacy is established. Other admitted routes remain in section 3; absence of an admission is not inferiority.

Overview​

Autonomic responses prepare the body for demand and then support recovery. Sympathetic and parasympathetic activity are not a simple on/off pair: their responses can differ across organs and over time. Useful regulation means measuring both activation and the return towards baseline. A brief meditation experiment tracked cardiac variability and skin conductance after stress, providing a specific recovery route rather than assuming that every calming exposure has the same physiological effect. Wadsworth et al. (2019) [2]; Borchardt and Zoccola (2018) [6]

  • Benefits: Recovery of physiological arousal helps the body transition after acute demand. Borchardt and Zoccola (2018) [6]
  • Implementation Notes: Focused-attention meditation after a stressor was tested against audiobook listening and quiet sitting. Wadsworth et al. (2019) [2]; Borchardt and Zoccola (2018) [6]
  • Biological Relevance: Heart-rate variability alone does not measure the whole sympathetic recovery response.

2. Primary Biological Effects​

  • After a stressor, meditators returned skin conductance and HRV towards baseline. Borchardt and Zoccola (2018) [6]
  • The attached study sampled salivary sympathetic-adrenal and HPA-related responses over reactivity and recovery. Wadsworth et al. (2019) [2]

3. Intervention Levers​

4. Mechanistic Basis​

Summary​

After a stressor, meditators returned skin conductance and HRV towards baseline. Borchardt and Zoccola (2018) [6]

Biological process​

HRV also recovered in controls; the distinguishing sympathetic-related result was skin conductance. Borchardt and Zoccola (2018) [6]

Mechanism Boundary​

Heart-rate variability alone does not measure the whole sympathetic recovery response. The draft preserves each source’s measured endpoint; the Mission describes the biological job and does not assert that every tested lever achieved the entire Mission.

Integration​

This PM contributes its specified process to BRS6(FM3). Shared fuels, nutrient lists and correlated markers do not merge distinct biological jobs or establish the integrated outcome.

4.1 Scientific Findings​

Summary​

A recovery experiment supports a brief practice with sympathetic-related and cardiac measures. HPA/SAM saliva markers and mouse probiotic vagal findings are different endpoints; no broad stress nutrient pool is established. Wadsworth et al. (2019) [2]; Borchardt and Zoccola (2018) [6]

5. BRS Pathways and Connections​

5.1 BRS Pathways​

No newly adjudicated BRS pathway is added by this preview.

5.2 Cross-BRS Mechanism Relationships​

No downstream mapping is inherited from a shared nutrient or KC candidate.

5.3 Local BRS Mechanism Relationships​

PM7 addresses cardiac vagal indices; acute sympathetic recovery is not equivalent to increased HRV.

7. Phenome Connections​

No new phenome rating is admitted by this unapproved preview. Inherited candidates are retained in the structured assessment history; biomarker or neural changes do not automatically demonstrate a cognitive outcome.

8. References​