Hydration plays a vital role in cognitive functioning during exercise by maintaining blood flow, regulating temperature, and supporting overall physical performance. Adequate fluid intake prevents dehydration, which can impair concentration, coordination, and reaction times, essential for exercise efficacy. Even mild dehydration can lead to cognitive decline, negatively impacting decision-making and focus during workouts. Research suggests that proper hydration enhances endurance and reduces the perception of exertion, allowing for improved performance. Ensuring sufficient fluid intake before, during, and after physical activities is critical for both mental and physical functioning.