Ok, Mu. You've told me that the majority of people who lose weight and keep it off do it without exercising. I've asked for a cite to back up that claim, and you've told me I'm not qualified to understand any studies on the subject because I'm not a scientist. My profession is child care. I have had quite a bit of training in this field, and I work at an after-school program. Parents sign the kids up at the beginning of the year, get all their paperwork in, and then pay at the end of each month based on how many days the kids actually came to the program. Our particular after-school program is being profiled on a national basis because we have the highest percentage of enrolled students in actual attendance. I am qualified to understand the statistics in the above scenario. What do I need to know that I don't know already to be able to understand a study about how many people exercise to help maintain weightloss? It's the same math concept. You look at two numbers and see which is bigger. -- Michelle Levin http://www.mindspring.com/~lunachick I have only 3 flaws. My first flaw is thinking that I only have 3 flaws.