keywords: overweight nutrition gain waistlines calorie
text: U.S. Finally Holds Line on Weight Gain By MICHAEL HILL    (AP) -- Americans are more calorie-conscious and holding the line on weight gain after years of expanding waistlines, according to a market survey released Wednesday, but nutrition experts were wary of the findings.    The NPD Group's annual survey on eating habits found the portion of overweight Americans holding at 62 percent for a second year...