We all know the runner's high is real, but science still isn't certain about why it occurs. We spoke with Dr Greg Gerdeman, an assistant professor of biology at Eckerd College, to understand the current theory. It's spelled out in the video above.
Now you know the benefits of running and how good it will make you feel, it's time to get out there and experience it for yourself. Looking for a race? Sign up to The Sunday Age City 2 Sea on Sunday, November 20.