Under what circumstances should a lifeguard use spinal motion restriction?

A lifeguard should utilize spinal motion restriction when there is suspicion of a spinal injury. This practice is crucial because spinal injuries can have serious and potentially life-altering consequences if not handled correctly. When handling a victim suspected of such injuries, minimizing movement is essential to prevent additional damage to the spine and surrounding tissues. The techniques used, such as stabilizing the head and neck, aim to securely immobilize the victim until they can receive proper medical evaluation and treatment.

In this scenario, the other options presented do not warrant the use of spinal motion restriction. Cold water conditions, minor injuries, or breaks do not involve the same level of risk for spinal injury that necessitates such precautions. Thus, understanding the importance of identifying situations where spinal motion restriction is needed is vital for ensuring the safety and well-being of victims in the water.