Final answer:
Your body releases heat during exercise by dilating blood vessels and increasing sweat production, which helps to radiate heat away from the body and cool it down as the sweat evaporates.
Step-by-step explanation:
During exercise, your body releases heat primarily by dilating blood vessels and increasing sweat gland output to manage body temperature. As exercise intensity increases, the body's metabolic rate goes up, producing more heat as a byproduct. To prevent overheating, blood vessels in the skin dilate, which allows more blood, carrying heat from the body core, to flow close to the skin surface where the heat can radiate into the environment. Concurrently, sweat glands increase their output, and the sweat, as it evaporates from the skin, takes additional heat with it. This process is crucial for temperature homeostasis during increased exercise.