Faster Biological Aging Tied to Weaker, Smaller Muscles
Graded Preliminary — a one-time survey of 29,437 adults shows links, not cause; some blood values used to calculate biological age are themselves tied to muscle.
- Design
- Cross-sectional study
- Participants
- 29,437
- Duration
- —
- Funding
- —
People whose bodies are biologically older than their birth date more often have little muscle and weak strength, even before age 60.
Some bodies are older than the date on the birth certificate. In a large survey in China, these people more often had little muscle and weak strength. They were also more likely to have age-related muscle loss. The link was especially clear in people younger than 60.
Researchers examined 29,437 adults aged 20 to 80 once, in 2023 and 2024. They calculated each person's biological age from routine clinical measurements such as blood values. Muscle in the arms and legs was estimated with a scale that sends a weak current through the body. Strength was tested with a handgrip device. The higher the biological age, the weaker the grip: in men, the typical grip fell from about 47.6 kilograms at a biological age of 20 to about 35.2 kilograms at 80.
The study cannot say whether faster aging weakens muscles or the other way round, because everyone was measured only once. Also, some blood values used to calculate biological age, such as creatinine, are themselves tied to muscle. That could make the link look stronger than it is.
Disclaimer: Research summaries are provided for informational purposes only and do not constitute medical advice. Always consult a qualified healthcare professional before making changes to your health routine.