Biggest Loser (Aus) calorie deficits

yarwell

Watching reruns of old series on UK daytime TV over lunch I spotted with the help of the pause feature that they had a large -ve net calorie intake for the day - a contestant was being pulled up for eating ~600 calories rather than his goal of 1800 but the high exercise calories put him a few k into the negative balance.

Anyone know if they have a particular goal, or if they just set a food intake for nutrition then work their >$%^& off ?