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The Physical Activity Paradox: Not All Forms of Exercise Lower Your Dementia Risk. This Type Raises It

Researchers found leisure-time exercise was linked to a 24% lower dementia risk, while work-related activity and active commuting were associated with higher risk.

Summary by Medical Xpress
Not all physical activity is equal when it comes to protecting the brain from dementia. Where and why we move may matter more than most people realize.

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An analysis of 4.2 million people has rendered obsolete the myth that "every exercise adds up" and has shown that physical work is not only not exercise, but can seriously affect cognitive function. While running or pedaling reduces the risk of dementia by 24%, killing oneself to work physically increases it in a heartbreaking 20%. To exercise voluntarily is healthy, but when the routine is repetitive and imposed by the work being done, fatigue …

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The Conversation broke the news in Boston, United States on Monday, August 24, 2026.
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