What is one recommended method to help lifeguards stay alert and vigilant?

Switching between sitting, standing, and strolling every 5 minutes is beneficial as it helps to keep a lifeguard physically active and engaged. This method ensures that lifeguards do not become stagnant or overly comfortable in one position, which could lead to decreased alertness over time. By changing positions frequently, lifeguards can stimulate their circulation and maintain a heightened state of awareness, ensuring they remain attentive to their surroundings and able to respond quickly to any emergencies that may arise.

In contrast, taking a 10-minute break every half hour, while beneficial for rest, does not foster immediate engagement with the environment and might lead to lapses in vigilance. Focusing solely on the deeper areas of the pool ignores potential hazards that could occur in shallower areas, and remaining in one position for the entire shift can lead to fatigue and decreased attentiveness. Therefore, the method of alternating positions actively supports the need for sustained alertness and responsiveness.