What is a potential risk of inadequate hydration during exercise?

Inadequate hydration during exercise significantly increases the risk of heat-related illnesses. When the body is dehydrated, its ability to regulate temperature diminishes, which can lead to conditions such as heat exhaustion or heat stroke. These illnesses occur when the body overheats and can no longer cool itself effectively, causing symptoms like dizziness, headache, and in extreme cases, loss of consciousness. Staying properly hydrated is essential for maintaining effective thermoregulation, particularly during intense or prolonged physical activity in warm conditions. Thus, ensuring adequate fluid intake before, during, and after exercise is crucial for health and performance.