This is the saddest excuse of a show I've EVER seen.
They encourage extremely unhealthy weight loss in the first place. The exercise is unsustainable, as are the "diets". It's mentally and physically unhealthy.
What got me the most, was the personal trainer who wouldn't let her team sleep. Anyone with any amount of knowledge about physiology would know that putting the body in extreme stress makes it want to hang onto weight, not lose it. Not sleeping would put these people over the edge.
Very sad.