Exercise trial changed an MRI-based brain-age estimate in older adults
The physical activity group showed a larger decrease in an imaging marker than an active control group; cognitive benefits were not established by this report.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
The activity group had a greater reduction in BrainAGE, an MRI-based estimate of the gap between predicted brain age and chronological age, than the active control group. This supports a change in an imaging marker during the trial. It does not establish better memory, slower clinical decline or a reversal of biological aging.
Only participants with MRI assessments entered this analysis. The abstract gives no intervention duration, effect size or confidence interval, making the marker's practical significance difficult to judge.
What researchers found
MRI-based BrainAGE
Physical activity versus the relaxation-and-education control over the intervention period; its length and the numerical between-group difference are not reported.
What the marker represents
BrainAGE uses structural MRI to estimate how brain age compares with actual age. The report treats this as a biomarker outcome; it does not report a corresponding change in cognitive performance.
A subgroup signal
Participants with lower starting cardiorespiratory fitness showed larger reported benefits on the imaging measures. This subgroup finding suggests a question for further study, but does not establish who will experience meaningful health benefits from exercise.
The original publication
Physical Activity and BrainAGE: Exploring the Impact on Brain Health and Plasticity in Older Adults.
Saraei T, Schrenk S, Puta C et al.
Hum Brain Mapp · 2025
- PubMed ID
- 41085956
- Record checked
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