The Study
Skeletal and cardiac muscle longitudinal associations in the Baltimore Longitudinal Study of Aging (BLSA)
This study watched a group of older people over many years and noticed that when their arm muscles got weaker, their heart muscles also tended to get smaller. But it didn’t make anyone change their habits — it just watched. So we can’t say muscle loss causes heart changes — only that they often happen together.
Analysis score
Maximum 72 for a cohort study.
Where the score came from
As people get older, their muscles shrink — including the muscles in their arms and their heart. This study found that people who lose arm muscle faster also tend to lose heart muscle faster, even if they’re the same age.
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 560 / 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.
- 1Yes — this suggests that keeping arm muscles strong might help protect the heart from aging, especially in older women without high blood pressure.
- 2Arm muscle shrinks by about 25 grams per year; heart muscle shrinks by about 0.73 grams per year.
- 3People with faster arm muscle loss had faster heart muscle loss — especially women.
- 4Handgrip strength didn’t predict heart muscle loss.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
BMC Medicine
Year
2026
Authors
J. Wong, F. Gao, Edward G. Lakatta, Eleanor M. Simonsick, Luigi Ferrucci, R. Tan, Majd AlGhatrif, A. Koh
Related Content
Claims (6)
In older adults, the amount of muscle loss in the arms and legs predicts changes in heart muscle mass more accurately than how old a person is, because changes in muscle mass remain linked to heart muscle changes even after accounting for other factors, while age alone does not show a significant link.
In older adults, the link between loss of muscle mass and loss of heart muscle mass is stronger in women than in men, with measurable differences in the strength of this relationship.
In older adults without high blood pressure, losing muscle mass is linked to losing heart muscle mass. In those with high blood pressure, this link does not appear, possibly because the pressure on the heart changes how aging affects the heart and muscles.
In older adults, a decrease in hand strength does not reliably correspond to a decrease in heart muscle mass over time, even though people with stronger hands at the start tend to have more heart muscle mass.
In older adults with healthy heart function, people who lose skeletal muscle faster also lose heart muscle faster at a consistent rate, even when accounting for age, sex, blood pressure, and body weight.
People with more muscle mass tend to live longer, resist diseases better, and maintain physical function as they age.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.