well they stay in shape. So your comments are all very well but I've seen quite the contrary with my own eyes. Well, no you haven't. You've seen people who are slim despite eating junk food. You are making the assumption - for that is all it is - that their thinness is related to their doing exercise. However, you haven't offered any evidence to support that conclusion. Some people are just naturally thin, no matter what they eat. It's entirely possible that these people may have the type of metabolism which burns off fat quickly, so the fact that they do exercise is neither here nor there. For all you or I know, they'd be just as thin if they sat posting on CiF all day. In any case, anecdotal evidence does not a case make. I could just as well say that despite almost never exercising, I remain thin while eating a high-calorie diet - which is true. The kind of people causing this obesity epidemic sure as hell won't be made fit by a 30 minute waddle. It needs a lot more exercise than that. Actually I would totally disagree with that. A very overweight person will gain significant benefits from walking for 30 minutes. Setting unreasonable targets for exercise (like I must go running for half an hour) when you haven't done any in years probably makes a lot of overweight people stop. Start small and build it up. You can't disconnect the lack of exercise