Midlife Exercise Linked to Lower Alzheimer’s Risk in Later Years

New research reveals that boosting physical activity between ages 45 and 65 can significantly reduce Alzheimer’s disease risk in older adulthood. A large-scale, multi-country study followed thousands of participants over 20 years, finding that those who regularly exercised—whether brisk walking, cycling, or gardening—had notably lower rates of cognitive decline. Even people who became active later in midlife saw benefits, suggesting it’s never too late to start. Scientists believe increased blood flow to the brain and protective growth factors may slow the buildup of harmful proteins linked to dementia. While family history and genetics remain factors, experts estimate that lifestyle measures could help prevent or delay one-third of Alzheimer’s cases. Health officials see these findings as a catalyst to promote exercise among middle-aged adults, who often feel pressed for time.