Winter workouts definitely make you feel like you deserve, if not a big feast, then at least a fondue. But does exercising around and below zero really help you burn more calories? "Only in some very specific cases," says Bob Seabor, a nutritionist, trainer and physiologist. "Energy consumption only starts to increase significantly if it's so cold that you start shivering," he added. Energy consumption Once you tremble, your body suddenly starts burning a lot of calories. According to Seabor, these involuntary muscle contractions lead to twice, three times or even four times the energy expenditure above the basic metabolism. However, an analysis of several studies from 2010 shows that 75-80% of the calories expended in trembling come from muscle glycogen stores. This means that if your teeth start chattering, you need to increase your carbohydrate intake. After all, if you are dressed appropriately, you will probably not tremble and therefore will not need