PADI Divemaster Certification Practice Exam

Which factor does NOT predispose a diver to decompression sickness (DCS)?

1. Fat tissue

2. Aging

3. Excessive hydration

4. Cold water exercise

The correct answer is: Excessive hydration

Excessive hydration is not a factor that predisposes a diver to decompression sickness (DCS). In fact, proper hydration is essential for divers as it helps maintain blood volume and circulation, which can assist in the elimination of inert gases like nitrogen from the body during ascent. When divers are adequately hydrated, it can reduce the risk of developing DCS after a dive because the body is better equipped to manage the pressure changes and gas exchange in the tissues. In contrast, the other options can contribute to a higher risk of DCS. Fat tissue, for instance, has a greater capacity to absorb nitrogen, which can later be released during ascent and lead to DCS if not properly managed. Aging can also increase susceptibility to DCS as the physiological responses to diving may change over time, leading to decreased efficiency in tissue gas exchange. Cold water exercise can cause vasoconstriction, reducing blood flow and potentially increasing the risk of gas bubble formation during ascent, which may lead to DCS.