(1)________________________________________________.For an overweight person, a doctor may advise medical treatment in addition to changes in behavior.But experts say the most successful weight-loss plans include a well-balanced diet and exercise.People who want to avoid weight gain have to balance the amount of calories they eat with the amount of calories they use. To lose weight,you can either reduce the amount of calories you take in,or increase the amount you use, or both.According to experts, to lose weight,a person should do an hour of moderate to intensive physical activity most days of the week.This could include fast walking, sports or strength training.(2)__________________________________________________________.One of the most important requests in a diet may simply be lower consumption of sugars.But there is also a report suggesting that only a small minority of people have long-term success with dieting.The report in the journal American Psychologist was based on thirty-one studies.Besides, researchers at the University of California medical school found that most dieters regained their lost weight within five years.And often they gained back even more.(3)______________________________________________.
