Why Can Blackout Occur Without Warning?
The Question
Why can a freediver lose consciousness without strong discomfort or warning signs?
Short Answer
Because oxygen levels can fall to critical levels while carbon dioxide remains too low to trigger intense breathing distress — especially during ascent.
Deeper Explanation
(Your own explanation in plain language.)
Focus on: - physiology - pressure effects - ascent dynamics - why intuition fails
Avoid equations unless necessary.
What This Means for Freedivers
- Why “feeling fine” is unreliable
- Why supervision matters
- Why ascent is critical
Related Papers
- Arterial Blood Gas Analysis in Breath-Hold Divers at Depth
- Association Between Arterial Oxygen Saturation and Lung Ultrasound B-Lines…