in health news this morning, a new study finds yo-yo dieting does not reck your metabolism. after studying women on diet plans, yo-yo dieters fared just as well as nonyo-yo dieters. 40% of people have a tendency toward yo-yo dieting. you can always check out the health page online at msnbsnews.com. the reds walk off. double-bingers for one d-back. and the pirates have to really work for the w. plus, a very messy pit stop at nascar s international.