Girls if you want a body like Jessica...you need to be lifting weights. I cant tell you how many women say they want to look toned and lean and "just like celebrities''. The most fit women in Hollywood are lifting weights not running on treadmills. Don't worry you wont get big or bulky. If your a women and you are planning on eating boat loads of calories, lifting very very heavy, and taking steroids..well then you might worry about getting big, but I doubt that is any of you out there, it fact I know that is not what any of you are doing. Message here is YOU WONT GET BULKY. Muscle actually takes up less space than fat and is more compact. Its simple, muscle=higher metabolism=toned and lean!!!