What vital signs should a lifeguard regularly check during first aid?

Regularly checking vital signs is crucial for a lifeguard during first aid as it helps in assessing the victim's overall condition and determining the appropriate response. The pulse provides information about the heart rate and rhythm, which are essential indicators of cardiovascular health. The breathing rate is vital for understanding how well the victim is oxygenating their body, which can be crucial in emergencies where respiratory distress is present. The level of consciousness gives insight into the victim's neurological function and overall well-being.

By monitoring these three parameters—pulse, breathing rate, and level of consciousness—a lifeguard can gauge the seriousness of a situation. These indicators not only help assess the immediate risks but are also instrumental in guiding decisions on further interventions such as calling for advanced medical help or initiating CPR.

While other options focus on different aspects of health, they do not encompass the essential parameters that provide a comprehensive overview of a person's vital status in an emergency setting, especially for a lifeguard's role.