The Grocery Store at Mile Twenty

In 2018, ultramarathon runner Courtney Dauwalter was thirty hours into the Moab 240 — a grueling 240-mile race across the Utah desert. Her body screamed for calories. Her vision was blurring. And then, at an aid station, someone offered her a chair. It wasn't the desert heat that nearly broke her. It was the chair. The small, reasonable, perfectly justified invitation to sit down and rest.…