Results

25 stories for“ups raises guidance”

PFO, asthma, diabetes and certain medications can all change whether diving is safe. Here is why the medical questionnaire before a course matters.

Jan 27, 2025

Diving

Breath-Hold Training on Land: What Evidence Actually Supports

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

Diving

Spearfishing and Freediving: The Overlap and the Added Risk

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

Diving

Lung Squeeze: The Freediving Injury That Comes From Trying Too Hard

Coughing pink after a deep dive is not something to shrug off. Squeeze happens when tissue cannot keep up with pressure, and the usual causes are tension, forcing equalisation and pushing depth too fast.

Aug 13, 2026

Results

Fitness to Dive: Why the Medical Form Is Not a Formality

Breath-Hold Training on Land: What Evidence Actually Supports

Spearfishing and Freediving: The Overlap and the Added Risk

Lung Squeeze: The Freediving Injury That Comes From Trying Too Hard

Results

Fitness to Dive: Why the Medical Form Is Not a Formality

Breath-Hold Training on Land: What Evidence Actually Supports

Spearfishing and Freediving: The Overlap and the Added Risk

Lung Squeeze: The Freediving Injury That Comes From Trying Too Hard