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.
How to build a chiselled chest
Your pecs are the key to a killer physique. Here, Men's Health fitness expert Khan Porter reveals his go-to moves to build a strong chest.