grunts through his eighth pullup rep, then lowers his six-foot-four frame back to the floor. Hands on his knees, he catches his breath, then flips the bird and grins. “F*** you guys.” Moments later, he’s doing a Copenhagen plank, a devastating side exercise that requires you to place one leg on a bench while the other hovers in midair. After 20 seconds, he collapses to the floor. “I need a Guinness,” he
