Malcolm Balk has taught sell-out Art of Running workshops for the past 15 years. These have helped thousands of people improve their running technique. They have also taken him around the world including North America, Australia and Europe.

Andrew Shields is a sport, health and fitness writer and editor. He is the author of six books and has twice been runner-up in the British Sports Journalism Awards. A former nationally ranked triple jumper, he is a qualified coach in several sports, including athletics, and recipient of a Special Award for Outstanding Achievement in Coaching from the London Active Partnership.