1. Running makes you happier
If you’ve been working out regularly, you’ve already discovered it: No matter how good or bad you feel at any given moment, exercise will make you feel better. And it goes beyond just the “runner’s high”—that rush of feel-good hormones known as endocannabinoids. In a study published in Medicine and Science in Sports and Exercise, researchers found that even a single bout of exercise—30 minutes of walking on a treadmill—could instantly lift the mood of someone suffering from a major depressive order.