Teams: The show started with two teams, "Blue Team" trained by Bob and Shannan and "Red Team" trained by Jillian and Michelle. The Australian trainers entered the game and individually the contestants chose their trainers, with the heaviest contestant choosing first (Damien) and the lightest choosing last (Mel). Bob and Jillian then entered and joined the Shannan and Michelle respectively as co-trainers. As teams became uneven throughout the game, some challenge rewards or penalties were to swap team members which retained even numbers for teams to compete fairly.