Kai Hibbard should be happy with the “The Biggest Loser”. The American reality show, which places a team of obese people in an extreme fit camp and challenges them to compete against each other to lose weight, sliced more than 120lbs of weight from her 5ft 6inch frame. But the intense schedule destroyed her, and many of her colleagues, and she has some stark stories to tell about her time on the programme. NBC claims it looks after its contestants and the impressive weight loss transformations have changed their lives across 16 series. True, not everyone has such a horror…