Your beliefs about yourself will also determine your limitations. If you don't think you can do it, you most likely won't. If you don't believe you can achieve the body you want, you won't. How long does a baby try to walk? Until. It doesn't just try for a few days or weeks and then quits, it keeps getting up, keeps pushing the limits, until one day, those limits are gone. It takes time to change your body, to change your lifestyle, to become the person you see yourself being. You will fall, you will be uncomfortable, but you will get back up, you will realize that comfort becomes your greatest enemy. Use the power of your mind to transform the physical body that carries it. See the body you want, the health you want, the person you see yourself as in your mind, and then work to make that vision manifest into reality.