People who have lost 10 percent or more of their body weight are more likely to avoid regaining 5 pounds or more if they weigh themselves regularly, especially daily. In a study conducted by Rena Wing of Brown University Medical School in Providence, R.I., 61 percent of those who weighed themselves daily maintained their loss within a 5-pound range after a year and a half. Only 32 percent of those who weighed themselves less frequently were similarly successful.