Exercise: The real wonder drug, Part 2:  Exercise: The real wonder drug: The last few years have given rise to a new crop of gadgets and software aimed at giving diets and workout routines a high-tech boost. Nutrition researchers say many of these devices employ proven techniques to help consumers make better lifestyle choices.

Exercise: The real wonder drug, Part 3:  Think you don't have the time to exercise? Can you find a half-hour every day? That's all you need to make a difference in your health, according to the National Institutes of Health.

Exercise: The real wonder drug, Part 4:  Those who really understands the relationship between what we put in our bodies and what we get out of a workout, say we should eat right, all the time. There's no better way to maximize the benefits of physical activity, period.

Exercise: The real wonder drug, Part 5:  Determined to lose weight and keep it off, our Dieting Dispatches bloggers have spent a year writing about their journeys to better health.