"Biggest Loser" trainer Bob Harper opened up about his 2017 heart attack, including the reaction of his costar Jillian Michaels.

Alongside Harper was fellow straight-talking coach Jillian Michaels, and despite the pair competing as team leaders, each hoping their contestants would be the ones to lose the most weight at the weekly weighing in ceremony, they seemed to share a close and loving friendship.

Bob Harper, who cohosted 12 seasons of The Biggest Loser with Michaels, said in a recent interview with The Guardian that she was not among the alums of the controversial reality competition series who reached out to him after he suffered a heart attack.