The body's primary mechanism for heat regulation during exercise is through sweating. As physical activity increases body temperature, the body initiates sweating to dissipate heat. When sweat evaporates from the skin, it cools the body down. Additionally, increased blood flow to the skin helps to facilitate heat loss. Maintaining a proper fluid intake is crucial during exercise to replace lost fluids and electrolytes, preventing overheating, and ensuring optimal performance. Collectively, these mechanisms work to maintain a balanced internal temperature during physical exertion.