Movement Type, Not Frequency, Tied to Dementia Risk
A large-scale meta-analysis suggests that while leisure-time physical activity is linked to a lower risk of dementia, physically demanding occupational labor may actually increase that risk. This finding challenges the general assumption that all forms of physical movement provide equal benefits for brain health.
Why it matters
Understanding the 'physical activity paradox' could lead to more nuanced public health guidelines regarding exercise and long-term cognitive health.
For years, scientists have known that regular physical activity can help lower the risk of dementia. But new USC research suggests that it's not only the amount but also the activity's context - for work or for leisure - that makes a difference.
A meta-analysis of more than 4.2 million people has found that leisure-time exercise - activities such as walking, cycling, running, swimming or playing sports - is associated with a substantially lower risk of dementia. In contrast, physical activity performed as part of a job appears to be linked with a higher risk of developing the condition.
Get smarter about the news
Sign up free for a feed built around what you actually care about, Dive Deeper research on any story, and the full text of every article.
Create free accountAlready have an account? Sign in