Certified Hyperbaric Technologist Practice Test

What effect does heavy exercise while at increased pressure have on the risk of decompression sickness?

1. Decreases

2. Has no effect

3. Increases

4. Varies significantly

The correct answer is: Increases

Heavy exercise while at increased pressure increases the risk of decompression sickness due to several physiological factors. During hyperbaric conditions, the body is exposed to higher levels of gas, primarily nitrogen, which can dissolve in body tissues. When a diver exerts themselves intensely while under pressure, the body absorbs more nitrogen due to the increased metabolic rate and cardiovascular output. After surfacing, rapid reduction of pressure can lead to the formation of nitrogen bubbles in the tissues and bloodstream, resulting in decompression sickness. The physical exertion can exacerbate this condition, as it can lead to faster nitrogen off-gassing due to increased blood flow to the tissues and muscles, raising the risk for bubble formation. Therefore, the intense physical activity under pressure does indeed elevate the chances of experiencing decompression sickness upon returning to a normal pressure environment. Understanding this relationship is crucial for safety protocols in hyperbaric treatments and diving operations.