The Biggest Loser Show

At the start of each season, contestants are grouped into teams and each team is assigned a personal trainer. For the first 3 seasons and seasons five through seven, there were two teams and two trainers, while the fourth season featured three teams and three trainers. The trainers are responsible for designing and teaching to the contestants comprehensive workout plans and nutrition plans. It is up to the contestants, however, how much or how little of the nutrition plan to implement, and how much of the workout plan they follow when the trainer is not present.
The season starts with a weigh-in to determine the contestants' starting weights. Each week culminates in another weigh-in to determine which team has lost the most weight for that week, in percentage of total weight lost. The team that has lost the lower percentage during that week must vote off one member of the team.