If you had told Helen Croydon two years ago that she would be getting up at 6 a.m. on Sundays to swim in a freezing reservoir and spending her Saturday nights unshowered and covered in mud in a pub, she would have spat out her champagne. But when everyone around you starts settling down, what else is a glamorous party girl to do but to launch herself into the world of endurance sport? For someone who didn't even own a pair of flat shoes (and definitely no waterproofs), Helen would soon find she had a lot to learn.

Join Helen on her hilarious and soul-searching journey as she swaps a life of cocktail bars and dating for the challenges and exhilaration of triathlons, trail runs, obstacle races, long-distance cycles and ocean swims... and sets herself the seemingly impossible goal of qualifying as a Team GB triathlete.