The way it works is on the 1st show they had all 50 peple at the ranch. Bob and Kim for to pick their teams. And 36 got sent home the 1st day. They got to meet with a trainer and nutritionist (from what I understand) to get a workout program and they got a copy of the BL book and workout dvd and access to BiggestLoserClub.com. The man and the woman at home that lose the highest percentage weight get to come back to the ranch and compete for the prize of biggest loser.
I think that's basically it (anyone please correct me if I am wrong

)