Harper is practically synonymous with The Biggest Loser. He trained contestants for the first 16 seasons and hosted the final two of the show’s 18-season run. Between seasons 17 and 18, Harper suffered a heart attack that left him unconscious for two days in February 2017.

The Biggest Loser trainer Bob Harper came perilously close to death when he suffered a heart attack in February 2017. The shocking health scare was seemingly unimaginable for Harper, who spent 18 seasons training contestants on The Biggest Loser to make their physical and emotional health a priority.