Definition: Dehydration refers to an inadequate amount of fluid in the body. Among athletes who participate in endurance sports or long workouts, dehydration can occur quickly. In general, a person is considered dehydrated when they have lost more than 2 percent of their body weight during exercise.
Adequate fluid intake is essential for athletes before, during, and after exercise. Whether to use sports drinks or just water depends upon your duration and intensity of exercise.
Also See: Proper Hydration for Athletes
Athletes need to stay hydrated for optimal performance. Studies have found that a loss of two or more percent of one's body weight due to sweating is linked to a drop in blood volume. When this occurs, the heart works harder to move blood through the bloodstream. This can also cause muscle cramps, dizziness and fatigue and even heat illness such as:
