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We covered shallow water blackout when I learned to dive, and were essentially told "a few slow, deep breaths are okay, but don't hyperventilate." The idea was
by ohazi 9y ago
We covered shallow water blackout when I learned to dive, and were essentially told "a few slow, deep breaths are okay, but don't hyperventilate." The idea was to use this and the dive reflex to get your heart rate down without actually flushing out CO2, which your body needs in order to tell you to breathe before you pass out.
- eric_h 9y agoI went free diving with a former Navy Seal - he said two slow breaths trying to fully empty your lungs each time, then take a deep breath and hold. Actively hyperventilating, especially if you're going deeper than 2 ATM (~10m/30ft) and your risk of a shallow water blackout goes way up.