Exercise Keeps you Warm
Besides food, exercise also warms you. During the day we are active and easily keep warm. During lunch, however, a common mistake is to put on an extra layer after you have cooled off and then expect to become warm. The extra layer is at air temperature and needs to be warmed. Remember, clothing cannot produce heat. Some exercise, like jogging-in-place, is needed to warm you. Another strategy is to put on the extra layer right when we stop so the built up heat from activity warms up the additional layer.