What physical state is NOT a predisposition for decompression sickness?

Being fit and healthy is not a predisposition for decompression sickness. In fact, a well-conditioned body typically has better circulation and can manage nitrogen levels more effectively during dives, which reduces the risk of decompression sickness.

Decompression sickness, commonly known as "the bends," occurs when nitrogen, which is absorbed by the body under pressure, forms bubbles as a diver ascends too quickly. Factors like overexertion, recent injury or illness, and alcohol consumption can negatively impact a diver's physiological state, increasing the risk of developing decompression sickness. Overexertion can lead to increased nitrogen absorption due to elevated metabolism and oxygen demand, while recent injuries or illnesses may impair the body's ability to handle pressure changes. Alcohol consumption can dehydrate the body and impair judgment and physical performance, further elevating the risk.

In contrast, being fit and healthy supports the body's capacity to tolerate the stresses associated with diving, thereby reducing the likelihood of decompression sickness.