Trainer Bob Harper comes out as gay on an episode of The Biggest Loser Biggest Loser trainer Bob tells the world he's gay to help a contestant through his own battles with his sexuality. Courtesy NBC. Bob Harper, celebrity trainer for the TV series, Biggest Loser. headshot Source: News Limited BOB Harper, one of the trainers on The Biggest Loser, has disclosed he is gay on an episode of the show. The 48-year-old trainer - who has also appeared on several seasons of the Australian version of the show - revealed his sexuality to a contestant, Bobby Saleem, who was struggling to tell his father that he is gay. I want to show Bobby that he doesn't have to live in shame ... Being gay doesn't mean that you are less than anybody else. It's just who you are," Harper said, before revealing that he came out to friends and family when he was 17. Bob Harper and Kim Lyons from the US version of The Biggest Loser Source: News Limited "When I came out ... I realised that there was going to be so many obstacles," he said. But being gay doesn't mean being weak. Later on Twitter, Harper released a short statement saying he believed coming out publicly was "appropriate and necessary." "I just wanted (Bobby) to know that he really is like everybody else and when he let go of that fear, it would change the course of his life," he said.