These findings are particularly remarkable because it’s normally quite difficult to get people to overeat substantially for more than a few days (imagine yourself eating twice as much food at each meal!). In other settings, researchers coax their volunteers to overeat using enticements such as money, and even then, volunteers have to force down the extra food against a growing sense of queasiness and impending stomach rupture. Yet in Ravussin’s study, his volunteers overate cheerfully without even being asked to,
