In addition to his appearances, speaking dates, and writing duties, Harper still teaches regular classes in Los Angeles and works as a yoga instructor.
In early 2010, Harper launched mytrainerbob.com, a website where subscribers can discuss weight loss and receive coaching. The success of his site led to the release of his first workout DVD series in May, titled "Bob Harper: Inside Out Method." Harper also contributes workouts to websites such as Shape magazine.
After reading the book Skinny Bitch, Harper became a vegetarian. In 2010, he then became a vegan for a year. That same year, PETA voted him sexiest male vegetarian of the year. Harper stopped following a vegan diet due to wanting "something more."
Harper has spoken out against puppy mills and has adopted a black and white dog from the Animal Advocates Alliance in Baldwin Park, California. He named the dog Karl, after Karl Lagerfeld, because of the dog's color.
Harper publicly came out as gay in the seventh episode of the fifteenth season of The Biggest Loser, while talking to a contestant who was having difficulty telling his parents about his sexuality. Harper revealed he came out to his parents at 17, but that this was his first time ever addressing his sexuality publicly in his career. The episode aired on November 28, 2013.