Most freediving blackouts happen in the first 15-30 seconds after surfacing. How to do recovery breaths properly, why your buddy needs to watch you, and the protocol that prevents most surface blackouts.

Negative pressure dives let you train deep-water adaptation in a swimming pool. How they work, when to use them, and how to add them to your training without the depth risk.

Trachea squeeze is the freediving injury most often mistaken for lung squeeze. Different bleeding pattern, different cause, different recovery. Here's how to spot it and prevent it.

Lung squeeze is the most-feared injury in deep freediving. Learn the warning signs, what causes it, how to recover, and how to train so it never happens to you.