The body responds to extreme temperature during exercise through several physiological mechanisms. In cold environments, the body constricts blood vessels and increases shivering to generate heat and maintain core temperature. Conversely, in hot environments, the body relies on sweating and increasing blood flow to the skin to dissipate heat. These responses are crucial for preventing hyperthermia and maintaining optimal performance. Both adaptations help optimize exercise efficiency and ensure that the body remains within safe temperature ranges during physical activity.