The Study
Moderate exercise induces trained immunity in macrophages.
This study looked at how exercise changed the behavior of immune cells in mice, but only in a lab dish—not in living animals or people. It shows a connection between exercise and cell changes, but doesn't prove exercise causes those changes to happen in real life or in humans.
Analysis score
Maximum 72 for a cohort study.
Where the score came from
When mice exercise regularly, their immune cells in the bone marrow learn to be less angry when they sense germs — they stop overreacting and start using oxygen better instead of burning sugar.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 518 / 100
Quality score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Key takeaways
Summary
Based on the study abstract and findings.
- 1This means regular exercise might help prevent chronic diseases caused by too much inflammation, like arthritis or diabetes, by training immune cells to stay calm longer.
- 2Exercised mice had 30–50% less inflammatory signals (like TNF-α) and 2–3x more mitochondrial efficiency in immune cells.
- 3Their DNA opened up near anti-inflammatory genes and closed near inflammatory ones.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
American journal of physiology. Cell physiology
Year
2023
Authors
Mayoorey Murugathasan, Ardavan Jafari, A. Amandeep, S. A. Hassan, Matthew Chihata, A. Abdul-Sater
Related Content
Claims (6)
Moderate-intensity aerobic exercise lowers the activity of inflammatory genes in immune cells by altering epigenetic marks or gene transcription mechanisms.
In mice, regular moderate exercise causes lasting changes in immune cells from the bone marrow that reduce inflammatory responses to bacterial signals and enhance energy production pathways.
In mice, moderate exercise improves mitochondrial function in bone marrow-derived macrophages by lowering reactive oxygen species production, increasing membrane potential, and increasing the number of functional mitochondria, which shifts cellular metabolism toward oxidative phosphorylation.
In mice, regular moderate exercise changes the accessibility of DNA regions that control anti-inflammatory and pro-inflammatory genes, leading to a shift in macrophage gene expression patterns toward an anti-inflammatory state.
In mice, moderate exercise decreases the use of glycolysis in macrophages activated for inflammation and increases the use of oxidative phosphorylation in macrophages activated for tissue repair, leading to a metabolic profile associated with reduced inflammation.
In mice, moderate exercise changes the metabolism and inflammation profile of immune cells from the bone marrow; after two weeks without exercise, most changes reverse, but reduced glycolysis remains.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.