The Study
Biomarkers of Cellular Senescence Predict the Onset of Mobility Disability and are Reduced by Physical Activity in Older Adults.
This study found that older people with higher levels of certain blood markers were more likely to have trouble walking later on, and that people who moved more tended to have lower levels of those markers. But it didn’t prove that the markers themselves cause the walking problems—just that they’re linked.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
Scientists studied older adults who were at risk of losing their ability to walk. Some did structured exercise, others got health tips. They measured chemicals in the blood linked to aging cells.
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 590 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — even if the exercise didn't lower the aging chemicals more than the control group, being more active still helped people stay mobile and lowered those chemicals overall.
- 2People who did more physical activity (≥760 counts/min) had lower levels of 10 aging-related blood chemicals.
- 3The exercise group had 13% fewer cases of severe mobility loss, but the chemicals didn't drop more in the exercise group than the control group.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
The journals of gerontology. Series A, Biological sciences and medical sciences
Year
2023
Authors
R. Fielding, Elizabeth J Atkinson, Zaira Aversa, T. White, A. Heeren, M. Mielke, Steven R. Cummings, Marco Pahor, Christiaan Leeuwenburgh, N. LeBrasseur
Related Content
Claims (6)
Older adults with mobility limitations who engage in higher levels of physical activity, measured as at least 760 counts per minute on an accelerometer, experience greater reductions in a set of 10 biological markers of aging over 12 to 24 months, regardless of the type of intervention they received.
Over 24 months, a structured exercise program for older adults with mobility issues did not change the blood levels of five biological markers associated with cellular aging, compared to a group that received health education.
Physical activity lowers the levels of biological indicators associated with aged or non-functional cells in humans.
Older adults aged 70–89 with mobility limitations who have higher levels of VEGFA, TNFR1, and MMP7 in their blood at the start of the study are more likely to develop major mobility disability within two years.
Older adults aged 70–89 with mobility limitations who participate in a 24-month program of supervised walking, resistance training, and balance exercises have a 13% lower rate of major mobility disability than those who receive health education only.
Older adults with mobility limitations who start with higher levels of GDF15 and osteopontin in their blood experience greater reductions in physical function over six months, as measured by standard mobility tests.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.