The “High” In Runner’s High Is Real, Science Says

man running beach
Your left foot pounds the ground, soon to be replaced by your right foot. Your heart is racing. Your arms are swinging back and forth, one after the other in a continuous motion. You’re pretty sure you look like a cartoon character. You have no clue how long you’ve been running, but you know you are on your third lap on the track. Well, four laps equal a mile.