It takes a tribe: building the Tough Mudder movement

Unlike other endurance events, Tough Mudder encourages team spirit.

The course's design forces you to seek help from others and with 20 obstacles, 40 tons of ice and 500,000 litres of Grade-A mud set over 10-12 miles, you're going to need it.

This revival of community is the key to the company's success.

In 'It Takes a Tribe', founder and CEO Will Dean explores the mental, physical and social principles behind the experience and reveals how he built a global tribe.