填空题 People who want to avoid weight gain have to balance the number of calories they eat with the number of {{U}} {{U}} 1 {{/U}} {{/U}}. To lose weight, you can reduce the number of calories you{{U}} {{U}} 2 {{/U}} {{/U}}, or increase the number you use, or both.
Experts at the National Institutes of Health say {{U}} {{U}} 3 {{/U}} {{/U}}, a person should do an hour of moderate to intensive physical activity most days of the week. This could include {{U}} {{U}} 4 {{/U}} {{/U}}, sports or strength training. You should also follow a {{U}} {{U}} 5 {{/U}} {{/U}}and take in fewer calories than your body uses each day.
A recent study {{U}} {{U}} 6 {{/U}} {{/U}}four of the most popular dieting plans in the United States. Researchers at Stanford University in California studied more than {{U}} {{U}} 7 {{/U}} {{/U}}women, mostly in their thirties and forties, Each woman{{U}} {{U}} 8 {{/U}} {{/U}}one of the four plans: Atkins, The Zone, Ornish or LEARN. The women attended diet classes and received {{U}} {{U}} 9 {{/U}} {{/U}}about the food plans. At the end of a year, the women on the Atkins diet {{U}} {{U}} 10 {{/U}} {{/U}}the most, more than four and one-half kilograms {{U}} {{U}} 11 {{/U}} {{/U}}. They also did better on tests including cholesterol levels and {{U}} {{U}} 12 {{/U}} {{/U}}.
Christopher Gardner led the study, reported in the Journal of the American Medical Association. He says the Atkins diet may be{{U}} {{U}} 13 {{/U}} {{/U}}because of its simple message to lower intake of sugars. Also, he says {{U}} {{U}} 14 {{/U}} {{/U}}increase protein in the diet leads to more {{U}} {{U}} 15 {{/U}} {{/U}}meals. He says there was not enough money to also study men, but that men would probably have {{U}} {{U}} 16 {{/U}} {{/U}}.
But last week, another report suggested that only {{U}} {{U}} 17 {{/U}} {{/U}}people have long-term success with dieting. The report in the journal American Psychologist was based on {{U}} {{U}} 18 {{/U}} {{/U}}studies. Researchers at the University of California, Los Angeles, medical school found that most dieters{{U}} {{U}} 19 {{/U}} {{/U}}their lost weight within five years. And often they gained back even more, But those who {{U}} {{U}} 20 {{/U}} {{/U}}generally were the ones who exercised.