The researchers tracked the diet and exercise habits of 120,000 health care professionals for at least 12 years. On average the participants in the study gained almost a pound a year. While that may not sound like very much, after several years it starts to add up. Dr. Frank Hu, one of the researchers, said,
“There is no magic bullet for weight control, diet and exercise are important for preventing weight gain, but diet clearly plays a bigger role”.