What is a primary risk associated with rapid ascents during a dive?

Rapid ascents during a dive significantly increase the likelihood of decompression sickness. This condition occurs when a diver ascends too quickly, leading to a rapid reduction in ambient pressure. Under higher pressure, nitrogen is absorbed into the body’s tissues while diving. If a diver ascends rapidly, nitrogen can form bubbles within the tissues and bloodstream as the pressure decreases, resulting in various symptoms associated with decompression sickness, often known as "the bends."

This risk underscores the importance of adhering to safe ascent rates and following recommended safety stops to allow for gradual nitrogen off-gassing, which helps prevent these potentially serious health issues. Understanding this risk is crucial for ensuring diver safety during aquatic activities.