Chinese race walker Liu Hong took gold in the 20-kilometre race walk this year after giving birth to her daughter Xixi in November 2017. Her winning time was 1:32:54 which, over a 12.4 mile race, equates to just under 7:30 minutes per mile. Walking. Hong, the world record holder in this event, told IAAF that as an athlete and a mother, "I have to devote much time to balance family life and training. It was a bit difficult for me, as I have to focus on the training and make my training more effective." With her gold medal in hand, we think she figured it out pretty well.