On July 13th, 2020, Adam Klink successfully completed the Castro Challenge of running a mile in under 5 minutes and back squatting 500 lbs (227 kg) in the same day! I was honoured to speak with Chris Hinshaw, international endurance coach and CrossFit® SME on aerobic capacity. Chris provides his insights into what's required to achieve a sub-5-minute mile, he breaks down Adam's time to further quantify the achievement and explains how the addition of the 500 lb back squat really showcases wha...