“Despite the fact that body weight remained unchanged over the course of the holiday season, a significant increase in % body fat and fat mass was observed. With recent evidence showing marked morbidity and mortality to be associated with increased body fat (particularly abdominal adiposity), results from this study suggest body weight alone is a crude measurement to assess the potentially deleterious effects of the holiday season.” http://www.nutritionandmetabolism.com/content/pdf/1743-7075-3-44.pdf