Exercising in your 40s and 50s might do more for your brain than you think. A 40-year study of thousands of adults found that people who stayed active in midlife and later life had up to a 45% lower risk of developing dementia https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2841638 https://www.tomsguide.com/wellness/fitness/this-huge-40-year-study-reveals-the-decade-when-exercise-matters-most-for-your-brain