Food portions in the United States have increased significantly over the past 20 years, leading to more calories in typical servings. A bagel that used to contain 140 calories now has 350, an increase of 210 calories. Burning off those extra calories through raking leaves would take 50 minutes for a 130-pound person. Similarly, portions of cheeseburgers, spaghetti and meatballs, fries, soda, turkey sandwiches and other foods now contain hundreds more calories than 20 years ago, requiring substantial additional exercise to burn off the excess calories. Maintaining a healthy weight requires balancing calories consumed with calories expended.