Decompression strain in parachute jumpmasters during simulated high-altitude missions: a special reference to preoxygenation strategies.

A preoxygenation/altitude procedure commonly used by JM, with a 60-min exposure to 28,000 ft after pre-oxygenation for 45 min at 8200 ft is associated with high risk of DCS. The decompression strain can be reduced by preoxygenating at sea level.