Runner’s high is a sense of intense happiness and reduced pain that occurs in some runners when running for a prolonged duration. It has been associated commonly with the release of endorphins and the impact of endocannabinoids in the brain.
This makes you feel happier, more concentrated, and you’ll use less energy so you’ll keep running fast and energized for a long period. You may not necessarily notice it each and every time but runner’s high tends to happen after 30-60 minutes of continuous running when your body adapts the most. Running consistently in the right heart rate zones and focusing when you do so can make you notice this good feeling more.