A new survey by Weight Watchers reveals that 40% of women give up on a diet after 7 days. Other findings:

- 15% of women have lost 10 pounds or more by dieting with friends

- women who diet alone have only a 20% chance of keeping the pounds off for amonth or more

- 22% of women have given up on a diet after one day

- 40% of women have lost weight because they envied a friend's weight loss