Key Questions in Freediving Science

This section explores the fundamental questions freedivers ask about physiology, safety, and performance. Each question is supported by peer-reviewed research.

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Beginner

• Why Can Blackout Occur Without Warning?
• Why Does the Urge to Breathe Not Reflect Oxygen Levels?

Intermediate

• Why Is Ascent the Most Dangerous Phase of the Dive?
• Why Does Repetitive Diving Increase Risk?

Advanced

• Why Do Freedivers Respond So Differently to the Same Dive?