What is a primary sign of hyperventilation in swimmers?

The primary sign of hyperventilation in swimmers is rapid breathing and possible disorientation. Hyperventilation occurs when a person breathes at an abnormally fast rate, which can lead to a decrease in carbon dioxide levels in the blood. This rapid breathing is often accompanied by feelings of lightheadedness or confusion due to the imbalance in gases. In the context of swimming, hyperventilation can be particularly dangerous as it may impair judgment and coordination, increasing the risk of accidents in or around the water. Recognizing these signs is crucial for safety and for taking appropriate action to help the individual in distress.