Business Insider spoke with CEO and founder of Tough Mudder Will Dean, about why people repeatedly come back to tackle the famous obstacle course. He said: "We are a tribe, a community.

Today, Tough Mudder announced a list of new obstacles and challenges that would be added in 2017, which are sure to recruit a new band of die-hard competitors as well as welcoming back old hands.

Kate and Susanna donned combat trousers and personalised t-shirts to film at an obstacle course ahead of our Tough Mums challenge launching on the show in September. No, Susanna, this isn't going ...