Much as human athletes, horses can sweat profusely when they’re under pressure from hard work, exercise, racing, competing, etc. Any strenuous activity can cause the animal to work up a sweat, losing vital body salts in the process. Although we can replace the body salts (electrolytes) lost, it is important not to ignore the significant volumes of water perspired. Dehydration is the main consequence of inadequate water intake, resulting in a reduced fluid content in the blood. This means that there is less fluid in the circulation and the heart must pump faster to compensate, leading to an increased heart rate, consequently lowering the horses’ endurance and negatively affecting its overall athletic performance.