So far in the 2016 Rio Olympics we have seen several world records (e.g. Ayana in the 10,000m, Peaty in 100m breaststroke, Wlodarczyk in the hammer,  Qingquan in weightlifting). In this video Michael Johnson, who yesterday lost his 400m world record to Wayde van Niekerk reflects on the future of sport in an age when technology is advancing rapidly.

Note: This video is also available in the OpenLearn Chasing Perfection video collection