We all know that exercise is good for us. It strengthens our muscles, boosts our metabolism, and keeps our hearts healthy. But did you know your workouts also give your brain a major tune-up? A fascinating new study shows that physical activity can actually reduce stress-related brain signals, protecting your heart in the process. Impact of stress on the body It's no secret that stress takes a toll on the body. When stress becomes chronic, our bodies release a surge of the stress hormone cortisol. This hormone...