Which stage follows cold shock in cold water immersion?

The correct answer is swim failure, which can be attributed to the body's physical responses following cold shock during cold water immersion. When an individual is suddenly immersed in cold water, the initial cold shock response can lead to involuntary gasping, rapid breathing, and potential hyperventilation. This response may cause disorientation and panic, increasing the risk of drowning.

Swim failure occurs when the body becomes unable to function properly in the water, typically due to muscle fatigue and the loss of coordination. As the body continues to be exposed to the cold water, these effects become pronounced, making it difficult for a person to stay afloat or swim effectively. This stage can set in quite rapidly after the cold shock response, indicating the importance of understanding and recognizing the signs when dealing with cold water immersion scenarios.

The other stages mentioned, such as hypothermia, post-immersion collapse, and crisis moment, may occur later in the sequence or as a result of prolonged exposure. However, the immediate consequence following cold shock is swim failure, as the body's ability to move and respond effectively diminishes.