The secret behind Rudisha's speed

... times, day and night," he said. "That's when I started to think: let me look at exercise work, core strength, pilates, the way you run, the way you carry yourself, the way you relate to the ground." About that time O'Connell had started to work with ...

http://www.iol.co.za/sport/athletics/the-secret-behind-rudisha-s-speed-1.1556971