On her most insecure days, synchronised swimmer Debbie Soh's well-being was determined by what an inanimate object told her. She stood on a weighing scale and waited for it to reveal a number.
Had she lost a little? Gained a gram? What did she do wrong to be 0.8kg heavier? Should she cut her meal portions in half? On a few ounces of weight can rest a human's self-worth.