
24/07/2025
In a recent study led by ISEH’s Dr John Mitchell, alongside Dr Joanna Blodgett and Prof. Mark Hamer, the team investigated the bidirectional relationship between physical activity and cognitive function in midlife. This research is significant because previous studies often assumed a one-way, causal link—suggesting that physical activity leads to improved cognition.
To establish the direction of this relationship, the authors looked at data from the 1946 British birth cohort looking at 2,888 individuals (51% female) with participants reporting physical activity and completing cognitive tests (processing speed and verbal memory) over 26 years (ages 43, 53, 63, and 69y).
Some key points on these findings:
- Cognition > physical activity: A one standard deviation increase in verbal memory was linked to higher odds of moderate physical activity at the next timepoint.
- Physical activity > cognition: Becoming physically active was associated with a modest verbal memory improvement at the next timepoint.
- S*x differences: Bidirectional associations were more robust in males compared to females.
- Conclusion: Physical activity and cognitive function influence each other over time, with stronger predictive effects observed from cognitive performance to future physical activity, particularly among males.
Swipe also for a comment from lead author of the study, Dr John Mitchell.
Access the paper here: https://pubmed.ncbi.nlm.nih.gov/40610395/