From: Biggest Loser Secret

I was told by a "trainer" that when a contestant doesn't lose adequate weight for any given week they're extended time. Yep, the contestant is given up to 3-4 weeks to lose the weight you see them lose in the ONE week. Then the producers just say it was one week. That's how and why they seem to have incredible weight loss in such a short time. Plus the time between the announcement of the finale and the finale itself is around 2 months. So no, these people aren't losing 80, 90 or 100+ pounds in 12 weeks. That could make people feel that they aren't trying hard enough. But the reality is that television isn't patient enough to wait for nature. They give a perception that somehow, someway that Jillian and Bob are magic makers that can transform anyone in 12 weeks.

Maybe y'all already knew this. I don't know. Just wanted to share.

Source: Biggest Loser Secret