India, Aug. 25 -- A major review in The Lancet Public Health shows a physical activity paradox in dementia risk.

Leisure exercise like sports, dancing, gym workouts and even housework significantly lower dementia risk, while physically demanding jobs and active commuting may raise it.

Researchers suggest factors such as education, pollution and unequal access to leisure time help explain why not all movement protects the brain.

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 realise.

A large new review of studies published in The Lancet Public Health found that leisure-time physical activity - such as sport, dancing or going to the gym - was...