From The Paris Review:
In the early 1970s, during the period he was writing his second novel, Something Happened, Joseph Heller, approaching his fifties, fretted about his health. He was shocked by how bloated he looked in mirrors. The double chins in his publicity photos bothered him. He began working out regularly at a YMCA in the sixties on Broadway in Manhattan, running four miles a day on a small track there. “The Angel of Death is in the gym today,” said the Y’s patrons every so often. Not infrequently, ambulance crews showed up to cart away, on a stretcher, an elderly man in a T-shirt and shorts who had collapsed while running or doing chin-ups. While exercising, Heller avoided meeting anyone’s eyes. He pursued his laps with grim seriousness. He worried about the slightest ache or twinge—in his lower back, bladder, calves, the tendons of his ankles, or bottoms of his feet. Sometimes, faint vertical pains shot through his chest and up through his collarbone. This was a hell of a way to try to feel better. In this melancholy spirit (stretching, rolling his arms to ease the needling pains), he squirreled away portions of Something Happened in a locker at the Y, in case fire ran through his apartment or his writing studio, or he keeled over one day. In the spring of 1974—a fit fifty-one-year-old—he completed the manuscript to his satisfaction and decided to copy it for his agent. He took his teenage daughter, Erica, with him to the copy shop. “I figured if a car hit me, if I got mugged, or if I dropped dead of a heart attack, the manuscript might still be saved,” he later told Erica.
“I asked him what would happen if he had a heart attack and I got run over,” she recalls.
“Then we’re both in trouble,” Heller told her.
More here.