The Biggest Loser (season 1)

Bold denotes the contestant that lost the most pounds that week

• The 12 contestants are split into two teams: the red team and the blue team. The red team consists of Lizzeth, Matt, Dave, Kelly Min., Lisa and Ryan is trained by Jillian. The blue team consists of Dana, Aaron, Kelly Mac., Andrea, Maurice, Gary and is trained by Bob.
• The Blue Team wins the first challenge and receives five pounds of lard to use against the losing team at the weigh in.
• Matt is the biggest loser of the week.
• The Red Team wins the weigh in.
• Dana is the first person to be eliminated, and since being on the show, she lost 5 lbs, plus an additional 15 lbs. (meaning that she lost 20 lbs. total)

• The Red Team wins the second challenge and receives a day at the spa.
• Aaron is the biggest loser of the week.
• The Blue Team wins the weigh in.
• Lizzeth is eliminated, and since being on the show, she lost 3 lbs, plus an additional 9 lbs. (meaning that she lost 12 lbs. total)

• Everyone at the ranch resists the temptation to eat a cinnamon bun to get a telephone call. As a reward, they all win a 5-minute phone call.
• The Red Team wins the performance challenge and receives a gourmet meal from Chef Cruz. Additionally, they forced the Blue Team to lose their trainer right before the weigh-in.
• Matt is the biggest loser of the week.
• The Red Team wins the weigh in.
• Aaron is eliminated, and since being on the show, he lost 36 lbs, plus an additional 27 lbs. (meaning that he lost 63 lbs. total)

• Dave gives in to the temptation to eat a cupcake and have dinner with a loved one.
• This week's challenge is to climb 74 flights of stairs. Since Gary and Maurice are injured, Matt and Lisa will be competing for the Red team against Kelly Mac. and Andrea of the Blue Team. Lisa has a panic attack and has to stop at the 34th floor. Kelly Mac. and Andrea make it to the top and win a helicopter ride over the city for the Blue Team.
• The Blue Team chooses Matt of the Red Team to sit out the weigh in.
• Maurice is the biggest loser of the week.
• The Blue Team wins the weigh in.
• Matt is eliminated.

• The Red Team wins the challenge by building the tallest food pyramid. They win $5,000 of computer equipment and video messages from home.
• Andrea becomes the first woman to be the biggest loser of the week.
• The Blue Team wins the weigh in.
• Dave is eliminated.

• The Red Team wins the life guard training challenge and are treated to new makeovers.
• Ryan is the biggest loser of the week.
• The Red Team wins the weigh in.
• Kelly Mac. is eliminated after the Red Team is forced to break a tie between Kelly Mac. and Maurice.

• Caroline Rhea announces that it is now an individual competition. The two people who are below the yellow line (having the lowest percentage cumulative weight loss) will be up for elimination.
• The individual spin cycle challenge is won by Gary, who rode for 79 miles. In addition to being immune from the next elimination, Gary also receives a shopping spree and a surprise visit from his wife and kids.
• Ryan is the biggest loser of the week.
• Andrea and Maurice are up for elimination, and Andrea is sent home.

• This week's challenge has all the contestants wearing their previously lost weight in vests. The previous day, they had run a lap around the track. Whoever could get closest to their time from the previous day would win immunity and a 32" LCD TV. Ryan wins the challenge.
• Gary is the biggest loser for the week.
• Lisa and Maurice are up for elimination, and Ryan turns against his former teammate and is the tie-breaker vote to eliminate Lisa.

• Episode 9 was a retrospective into the first eight episodes.

• The prize for the weekly challenge is a $7,000 treadmill. There is no immunity. The contestants had to stand on bales of hay holding a bouquet of balloons. Ryan wins the treadmill.
• Ryan is again the biggest loser.
• Maurice and Kelly Min. are up for elimination
• Maurice is voted off, leaving Kelly Min., Gary and Ryan in the final three.
• Winning percentage will be based on weight loss and fat percentage lost.
• Kelly Min. has a total weight loss of 79 lb (36 kg) (33%) and decreased her body fat by 17% for 50%.
• Gary has a total weight loss of 71 lb (32 kg) (31%) and decreased his body fat by 23% for 54%.
• Ryan has a total weight loss of 122 lb (55 kg) (37%) and decreased his body fat by 18% for 55%.
• Ryan is declared the biggest loser and the winner of $250,000.

• The Reunion show saw the 9 non-finalists compete for $100,000. Each was dunked in the water tank to check their fat loss and weighed.