Some days, the hardest part of exercise is putting on your shoes. Then ten minutes later, something shifts. Your shoulders loosen. Your mood lifts. Your thoughts feel less tangled. You might even wonder, “Why didn’t I do this sooner?” That good feeling isn’t imaginary. Movement changes what’s happening in your brain and body, often in ways you can feel pretty quickly. As the years go by, exercise can become less about chasing a number on a scale and more about feeling steady,