“After I had my heart attack, she’s the one person I never heard from. So, I mean, that to me spoke volumes.”

Carla Triplett made The Biggest Loser history when she appeared on the show’s seventh season in 2009 at 379 pounds — the heaviest for a contestant at the time.

One of the shocking stories has included a contestant revealing that the physical training she underwent on her first day filming led to her waking up in the hospital and realizing “I knew I died that...