HFCS might be a contributor, but would simply show up as an increase in energy intake. If you go from eating X amount of sugars in a day to eating 2X amount of

HFCS might be a contributor, but would simply show up as an increase in energy intake. If you go from eating X amount of sugars in a day to eating 2X amount of sugars in a day, that just shows up as an increase in caloric intake. This article was trying to contrast energy intake with exercise to see if the obesity seen was being caused by an increase in the amount we ate or a decrease in the amount we exercised (rather than seeing what foods might have been the culprits of the increased energy intake).