A growing body of research points to the body’s natural cannabinoid system as the primary driver behind the runner’s high – and the mental health boost and stress relief following exercise.

In track and field, it's a common belief that middle lanes are the fastest. But according to the data, middle lanes aren't better, and in the 200-meter sprint, outside lanes might even be faster.

Endurance running is experiencing its 'marginal gains' moment.

A high-tech twist on an old idea – running on springs – could give human-powered movement its biggest boost in more than a century.