I n April, Elizabeth Smart, 38, won first place in her category in the Wasatch Warrior bodybuilding competition in Salt Lake City, Utah . This was Smith’s fourth bodybuilding competition – her first had been at the same event a year earlier. But despite being a public figure, no one outside her friends and family knew she had been doing this. She competed under her married name, Elizabeth Gilmour, and hadn’t posted any content about her bodybuilding. But after her win, a friend asked if she could post about Smart’s victory on Instagram. “At first, I was like, ‘No!’” she recalls, sitting in her airy Utah home. Smart first entered the public eye under nightmarish circumstances. In June 2002, when she was 14, Smart was kidnapped, taken at knifepoint from her family home in the middle of the night by a self-styled prophet named Brian David Mitchell. For the next nine months, he subjected her to horrific physical and sexual abuse.…