Lancet Review Links Work Exercise to 20% Higher Dementia Risk as Leisure Activity Cuts Risk 24%
Updated
Updated · The Conversation · Aug 24
Lancet Review Links Work Exercise to 20% Higher Dementia Risk as Leisure Activity Cuts Risk 24%
3 articles · Updated · The Conversation · Aug 24
Summary
Data from 74 studies covering 4.2 million people in 30 countries found occupational physical activity was linked to a 20% higher dementia risk, unlike exercise done in free time.
Leisure-time activity such as sport, dancing or gym workouts was associated with a 24% lower risk, while housework showed a 15% lower risk in evidence drawn from one study.
The review also found active commuting was tied to a 10% higher risk, extending a “physical activity paradox” already seen in heart disease research.
Researchers said the gap may reflect education, mentally stimulating work, and exposure to pollution, noise, heat and stress in manual jobs or during commuting.
The findings suggest dementia prevention depends not just on moving more but on unequal access to protective leisure activity, especially in lower-income settings.