Weight Loss from Activity Only Works in Thin Middle Age Women

Talk about a cruel trick of nature!  A study funded by the National Institutes of Health (NIH) and published in JAMA shows that physical activity prevents weight gain in middle-aged and older women ONLY IF THEY ARE ALREADY AT IDEAL WEIGHT.  Did you read that?  It means that the recommended guidelines advocating 150 minutes of exercise a week isn't sufficient to prevent weight gain in most middle