A new study suggests places like concession stands, known for their waist-expanding menu options, can actually increase revenues and encourage healthier eating by adopting healthier ingredients and adding just a few healthful items to their repertoire. In the fall of 2008, the booster club in Muscatine, Iowa took a chance. Researchers from the University of Iowa asked whether the club would add healthy foods – from apples to string cheese – to its concessions menu. And, by the way, would it also consider putting healthier ingredients in big sellers like nachos and popcorn? The little gamble paid off for the Muskies. According to a new study published this week in the Journal of Public Health, the club netted stable sales and revenues with the healthy-food additions over one full season. Profits remained intact as well. Average sales per varsity football game rose to $6,849 in 2009 from $6,599 the year before, an increase of 4 percent. Moreover, the healthy foods made up 9.2 percent of concession sales, signaling the new products could boost overall sales. Parents and students also said they were happy with the healthy-food choices, according to surveys cited in the study.