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How working out makes your brain less scared

Original Title

Exercise as a multiscale recalibration of stress-related homeostatic balance

Analysis v4

Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms

Summary

When you exercise, your muscles and liver send signals to your brain that help it calm down and remember what’s safe—like a reset button for stress.

Proposed Mechanism
Exercise-induced BDNF-TrkB signaling stabilizes synaptic plasticity
Supported by evidence
Exercise-induced m6A epitranscriptomic remodeling restores prefrontal plasticity
Supported by evidence
Exercise-induced histone lactylation stabilizes synaptic integrity in mPFC
Supported by evidence
Exercise-induced irisin enhances hippocampal BDNF via peripheral-to-brain signaling
Suggested
Exercise-induced kynurenine detoxification protects the brain from neurotoxicity
Supported by evidence
Exercise-induced β-hydroxybutyrate enhances BDNF via HDAC inhibition
Supported by evidence
Exercise-induced endocannabinoid signaling reduces anxiety via forebrain GABAergic inhibition
Verified
Exercise-induced VEGF-A enhances neurovascular plasticity and hippocampal neurogenesis
Supported by evidence
Exercise-induced adiponectin reduces neuroinflammation and modulates dopamine signaling
Suggested
Exercise-induced mTOR signaling integrates metabolic state with synaptic plasticity
Supported by evidence
Exercise-induced thalamocortical pathway enhances prefrontal regulation of threat
Supported by evidence
Exercise-induced dorsal root ganglion–gracile nucleus–dorsal raphe–mPFC pathway reduces anxiety
Supported by evidence

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Quality Analysis
Methodology
1%
Lower QualityOverall Score
Narrative ReviewMedicine/Biology

Systematic Reviews & Meta-Analyses

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Randomized Controlled Trials

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Cohort Studies

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Case-Control Studies

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StrongerWeaker
Expert Opinion & Narrative Reviews
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1

1 / 5

Evidence Score

Based on clinical experience or non-systematic literature reviews. The lowest level of evidence as they are most susceptible to bias and personal perspective.

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1%
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Publication

Authors

Chen Y, Qiu X, Ni G, Shao J, Yang F

Analysis v4
DOI:10.3389/fnins.2026.1801865
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