What is the primary recommended prevention for decompression sickness?

• A. Follow decompression table
• B. Hydration during ascent only
• C. Exercise vigorously after ascent
• D. Ignore safety stops

Answer: (A)

Preventing decompression sickness hinges on controlling how nitrogen is off-gassed as you rise. The best protection comes from following a plan based on decompression tables (or a dive computer) that outlines safe depths, times, and mandatory safety stops. These tools encode how long you can stay at certain depths and when to pause so nitrogen leaves the tissues gradually. Adhering to that ascent profile keeps off-gassing within safe limits and minimizes bubble formation.

Hydration is important for overall health, but it doesn’t replace a structured ascent plan. Exercising vigorously after ascent isn’t protective and can worsen the problem by increasing circulation and bubble movement. Ignoring safety stops removes a critical window for off-gassing and markedly raises the risk of decompression sickness.