This controversial study was published in the Journal of the American Medical Association this week. Some have seen it as pessimistic, because only middle-aged women of normal weight who also exercised avoided weight gain. Of course, they are based on self reports of weight and exercise. It is possible that the women who weighed more might have eaten more and exercised less than they reported.
Anyway, it suggests that an hour a day is key. So, get walking ladies! And even if you don’t get an hour, every little bit helps.
Remember also: as we age, we generally lose muscle and bone, and gain fat, even if our scale weight stays the same. So, add some resistance training – see the exercises in Drs. Roizen and Oz’s YOU book.