I started jogging 25 minutes at an easy pace just to clear my head: since then, my blood carries up to ten times more of these cells during the effort
A casual jog does far more than clear your mind—it unleashes a dramatic immune surge. Natural killer cells, your body’s frontline defenders against infection and abnormal cells, flood into your bloodstream in numbers that can multiply tenfold during moderate exercise. Understanding this mechanism reveals why movement remains one of the most direct conversations your body has with its own defenses.