Child pages (Children Display) |
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Swimming
Safety
- Shallow Water Blackout
- http://www.shallowwaterblackoutprevention.org/how-it-happens/
- How it happens:
- Hyperventilation: Overbreathing either consciously or as a result of overexertion, artificially lowers carbon dioxide levels.
- Oxygen-level drop: As the breath hold begins oxygen is metabolized and carbon dioxide levels increase. As the breath hold continues the body becomes starved of oxygen.
- Unconsciousness: Under normal circumstances increased carbon dioxide would trigger a breath, but because CO2 levels were so low on submersion (due to hyperventilation), there is not enough to initiate a breath. The swimmer loses consciousness.
- Drowning: Once the swimmer loses consciousness, the body reacts and forces a breath. That causes the lungs to fill with water and without an immediate rescue a drowning death is all but certain.
- Takeaway lessons:
- Never hyperventilate before swimming
- Never ignore the urge to breathe
- Never swim alone
- Never play breath-holding games
- No repetitive underwater laps. One lap, breathe.
- Other info
- Unlike regular drowning where there can be 6-8 minutes before brain damage and death, there are ONLY about 2 ½ minutes before BRAIN DAMAGE then DEATH with SWB because the brain has already been oxygen deprived coupled with warm water as in swimming pools, hastening brain death.
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