Holley Mangold, 22, has been a competitive weight lifter for only 3½ years. But she’s always been strong — so strong, in fact, that she played football in high school. Mangold, a reserve offensive lineman, became the first girl in Ohio to play a down from the line of scrimmage in a varsity football game and the first to play in a state championship game. The younger sister of New York Jets Pro Bowl center Nick Mangold, she is a contender in the super-heavyweight division. At 330 lb., she has never been self-conscious about her size. “I love my body,” she says. “I’ve always been confident … I always tell everyone, ‘Thank God I wasn’t skinny.’ Because God knows how cocky and terrible I’d be.”