What a weekend for running! On Saturday the world was captivated by the Ineos 159 challenge that saw Eliud Kipchoge become the first person to run a marathon distance in under 2hours, then, on Sunday in Chicago fellow Kenyan Brigid Kosgei obliterated Paula Radcliffe's world record. We're joined by Two Hours author and 1:59 commentator Ed Caesar to reflect. You can help get legendary Bruce Tulloh's book 4 million footsteps back in print, Professor Andy Jones explains nitrates and endurance in Training Talk and Tony is here with his trials.