The Biggest Loser kicks off tonight on USA Network. Celebrity trainer, Bob Harper, explains how they provide the contestants with a 360 degree view of what it takes to make a serious lifestyle change, rather than focus solely on weight loss. In addition to competing to win a cash prize by losing the highest percentage of weight relative to their initial weight, the contestants will also learn hot wo prepare and make healthful food choices and use group therapy to help them overcome the obstacles that are preventing them from living a healthy life.