In this episode, we explore the body's immediate physiological responses to cold exposure, focusing on mechanisms that limit heat loss and generate heat to maintain core temperature. We discuss vasoconstriction, blood redistribution, and the impact of wind chill on heat loss. The episode also covers thermogenesis, including shivering and non-shivering mechanisms, metabolic shifts toward carbohydrate utilization, and the effects of cold stress on cardiovascular function, hydration, and endurance. We highlight the Lewis-Hunting reflex as a critical adaptation for preventing frostbite while conserving heat.