For questions about the daily calorie calculation: This formula is used in many clinical weight loss trials—and, it's true—it assumes that the person using the equation is sedentary. If you're an active person and you're finding that your result (say 1200 calories) is too low, bump it up gradually to one that feels satisfying to you. The point is NOT to starve yourself. Most people will lose weight on a 1500 calorie diet, some on an even higher caloric level. The best gauge for whether you're at the right level is how satisfied you feel (you shouldn't be hungry all day!) and whether you're losing weight. If you're losing weight on 1800 a day and you feel great, stick with that. The calculation is just a suggested starting point.
—Nicci Micco, M.S., Deputy Editor of Nutrition