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12 stories for“shallow water blackout”
Shallow water blackout does not warn its victim first. Here is the physiology behind it, why it strikes trained divers, and why solo breath hold diving is never safe.
Jun 10, 2024
Spearfishing shares its breath hold physiology with freediving, but a hunting mindset changes the risk calculation entirely, and blackout remains the top cause of death.
Apr 8, 2026
Breathe-up, diaphragmatic breathing and the recovery breath are the three that matter. Hyperventilation is the one that removes your warning that you are about to black out.
Aug 10, 2026
Frenzel and mouthfill solve the one problem that stops more beginner freedivers than fitness or fear ever does: equalising the ears under rising pressure.
Dec 5, 2024
CO2 tables build genuine breath hold tolerance over weeks. Hyperventilating beforehand does the opposite of what beginners think it does, and it has killed trained divers.
Sep 2, 2025
Overweighting is the most common equipment error in freediving and the one with the worst failure mode. The rule is simple: neutral at ten metres, positive above it, and the surface is where it matters.
Aug 11, 2026
Submersion triggers an ancient reflex that slows the heart, redirects blood, and quietly reshapes what a trained freediver's body can survive underwater.
Sep 18, 2024
Dahab's Blue Hole draws freedivers year round for a reason: shore access to real depth, warm water, forgiving conditions and an established training community.
Nov 14, 2025
At the Asian Freediving Cup in Panglao, the Hawaii-based American pulled herself to 106 metres and back on one breath, matching a mark Natalia Zharkova has held alone until now.
Aug 3, 2026
Yogic breathing is unusual among wellness practices in having a measurable, replicated physiological effect. The size of it is modest, the mechanism is well understood, and a few of the more dramatic techniques carry real risk.
Sep 4, 2026
Budapest and Novi Sad staged world championships nine days apart under rival federations. Four AIDA world records fell, then CMAS records fell again, often to the same athletes.
Aug 4, 2026
CWT, CNF, FIM, STA, DYN: a plain guide to how competitive freediving is actually judged, discipline by discipline, and why the letters matter more than the depth alone.
Feb 14, 2024
