Brain Health

Lifelong Physical Activity Slows Cognitive Decline in Midlife Adults

A landmark Finnish study tracked 1,353 people from childhood through age 48, measuring physical activity every 3–9 years and testing cognitive function twice in midlife. People who accumulated more physical activity across their entire lives showed significantly less decline in information processing speed — equivalent to a 3-year cognitive age advantage. Among men, lifelong activity also preserved working memory, offering roughly a 2.7-year advantage. Importantly, activity in youth alone did not protect cognition independently; what mattered most was sustained activity through adulthood. The findings suggest that keeping active across the entire lifespan — not just in childhood — is key to maintaining sharper executive cognitive function as we age.