I'm back. I did fail in my earlier posts to mention diet - sorry, my bad. It is true that you "feed muscle, starve fat." That is why weight training is so important. As you lose weight, if you don't build muscle (i.e. weight train) you will lose it right along with the fat. So it is critical that you weight train, whether you do S&H type workouts or circuits or whatever, you must do something. Like I mentioned earlier, it's best to mix it up. You really do need the S&H type stuff to see real muscle and strength gains, but adding circuits in your rotation is fine (saves time, shortens your workout, provides variety which aids motivation, etc.). Diet is also ultra important. Lots of water, lean protein (a must for muscle building, but don't go overboard because it can also cause weight gain), complex carbs (vegetables, whole grains, legumes, etc.), and good fats (again, don't go overboard). Minimize your sugar and sodium intake. No soda (not even diet - yuck). No high-fructose corn syrup (in just about everything processed). These will sabotage your efforts. Minimize your processed food intake as much as possible - this is the "American diet" problem because virtually all processed food is high in sugar, sodium and refined flours, none of which does you any good. Eat as much of your food in as close to its natural state as possible (eating "clean"). When you shop, stick to the outside aisles of the store. I try to fill my cart/shopping needs halfway with the produce aisles alone! You do need to eat enough to maintain your metabolism because, as a previous poster indicated, if you don't your body goes into starvation mode and starts to burn muscle and your metab will drop. It's actually relatively easy to do, just read labels every time. Don't eat unless you are hungry. Drink a glass of water about 15 minutes before every meal. Hope this is helpful and not more confusing.