How does dehydration affect exercise performance?

Dehydration significantly impairs thermoregulation, which is the body's ability to maintain a stable internal temperature during exercise. When fluid levels drop, the body’s capacity to sweat effectively declines, reducing its ability to cool down. This can lead to an increased core temperature, which further impacts performance, endurance, and can even lead to heat-related illnesses.

In a dehydrated state, athletes may notice a decline in their overall exercise performance due to the heat stress placed upon their bodies, leading to fatigue, increased heart rate, and the possibility of heat exhaustion or heat stroke. Therefore, maintaining proper hydration is essential for optimal thermoregulation and overall exercise performance.