How do lifeguards recognize signs of dehydration in swimmers?

Lifeguards can effectively recognize signs of dehydration in swimmers primarily by observing physical and behavioral symptoms. Indicators such as fatigue, confusion, and excessive thirst are warning signs that a swimmer may be experiencing dehydration.

Fatigue often manifests as a lack of energy or unwillingness to engage in physical activity, which can be particularly noticeable in a swimming environment where energy levels are typically high. Confusion can result from the body’s electrolyte imbalance and decreased cognitive function due to insufficient fluid intake. Excessive thirst is a direct signal from the body that it needs more fluids. These symptoms paint a clear picture that a swimmer may be in distress due to dehydration.

While assessing lap times or noticing avoidance of swimming activities may provide some information about a swimmer's performance or willingness, these factors do not directly indicate dehydration. Checking skin color can offer some insights, but it may not be as reliable or comprehensive as observing the broader range of more critical symptoms associated with dehydration. Hence, recognizing the combination of fatigue, confusion, and excessive thirst serves as a more reliable method for lifeguards to identify swimmers who may need immediate assistance due to dehydration.