Faith Kipyegon has gone from running her first races barefoot to reaching the summit of the track and field world, winning her fourth women’s 1500m world title in Tokyo. But what is that makes her such a dominant force?

Ed Harry and Ade Adedoyin are joined by Kenyan track and field journalist Lynne Wachira, while Ade gets the thoughts of Kenya’s double Olympic champion and the men’s world and Olympic 800m record holder David Rudisha on the achievements of Kipyegon.