Hallmarks of exercised heart.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing mechanistic pathways without primary human clinical data
PubMed 34914934 · doi:10.1016/j.yjmcc.2021.12.004
What was done
Narrative review summarizing current understanding of structural, functional, and molecular cardiac adaptations to long-term endurance exercise training.
What was found
The review outlines eight tentative hallmarks representing cardiac adaptations to exercise: cardiomyocyte growth, cardiomyocyte fate reprogramming, angiogenesis and lymphangiogenesis, mitochondrial remodeling, epigenetic alteration, enhanced endothelial function, quiescent cardiac fibroblasts, and improved cardiac metabolism. The abstract reports no empirical numbers or quantitative findings.
Why it matters
Synthesizes current knowledge on exercise-induced cardioprotection into a conceptual framework to help identify potential therapeutic targets for heart diseases.
Limits
Narrative review with no primary empirical data, quantitative synthesis, or systematic search methodology; relies purely on mechanistic reasoning and previously published findings.
Cited by
- contradicts Much of the cardiovascular benefit of aerobic exercise for the heart is mediated by stimulating the growth and health of lymphatic vessels rather than acting directly on heart cells.