Send us a text This episode breaks down the strongest scientific evidence that exercise protects your brain immediately and over the long arc of your life. We translate major studies into clear, actionable steps, showing how aerobic workouts sharpen attention today, how HIIT strengthens executive function, and how decades of sustained fitness can dramatically delay dementia onset. We begin with a meta-analysis of 29 trials, demonstrating that a single session of aerobic exercise produces imme...