To maintain weight, the number of calories consumed must equal the number of calories the body burns. For those trying to lose weight, the number of calories consumed must be fewer than the number burned each day. The most effective way to accomplish weight-loss is to cut back on calories by decreasing food intake, while increasing physical activity.

"When going out for fast food, I used to get the large-size value meal. Now, I satisfy a craving by ordering just one item: a small order of fries or a six-piece box of chicken nuggets. So far, I've shaved off 16 pounds in seven weeks, and I'm on track to being thinner than my high school self for my 10-year reunion later this year." —Miranda Jarrell, Birmingham, AL
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