Sam Rouen entered the Biggest Loser Australia reality TV show 10 years ago as an obese teenager desperate to lose weight.
A decade on, Rouen has not only lost the weight - a whopping 79kg - but has turned into a calendar-worthy firefighter.
Rouen won the third season of the TV show in 2008, aged 19, and has defied all scientific odds by keeping the weight off and improving his physical condition even after the show ended.