Which factor can contribute to heat injuries during physical activity?

Dehydration is a significant factor that can contribute to heat injuries during physical activity. When the body does not have enough fluid to maintain proper physiological function, it becomes more susceptible to overheating. Hydration is essential for regulating body temperature through sweating and maintaining cardiovascular function. When fluid levels are low, the body cannot effectively cool itself, leading to conditions such as heat exhaustion or heat stroke.

Proper hydration helps the body dissipate heat more efficiently, while dehydration can lead to a cascade of issues that impair performance and increase the risk of heat-related illnesses. This highlights the critical importance of maintaining adequate fluid intake before, during, and after exercise, especially in hot and humid conditions or during prolonged activities.