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Anthony Feoutis, author of The Depth Collector, descending in a Free Immersion dive along a rope in a streamlined position. He is wearing a wetsuit and mask, captured in a dramatic underwater scene with soft lighting and a focused perspective.

The Depth Collector

A detailed black and white illustration of an octopus with intricately textured tentacles, blending into human-like fingers at the tips, set against a solid black background.

By Neptune’s beard, I’m glad you touched down here!

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Welcome, fellow depth-seeker! I’m Anthony, and I couldn’t be more thrilled that you’ve found your way to this little corner of the abyss.

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Over the years, I’ve poured my heart into training, teaching, and exploring the depths of freediving—a journey that has shaped my life in ways I never could have imagined. The Depth Collector series is my way of sharing everything I’ve learned about the art and science of freediving—a path filled with challenges, breakthroughs, and those quiet, magical moments beneath the surface.

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Whether you’re holding your breath for the first time or chasing new personal bests, you’ll find inspiration, guidance, and a glimpse of my own passion for the underwater world within these pages. So dive in, explore the site, and if you're curious, grab a free chapter for a taste of what’s inside.

Ornament

The 8 Foundational Pillars of Freediving Training

The heart Of the Depth Collector Series

I’m a freediving instructor trainer who’s spent over a decade chasing depth and becoming completely captivated—some might say obsessed—by how the human body adapts to the ocean. Honestly, at this point, I think I’m bleeding seawater.

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Together with my amazing wife, I co-founded VD Freediving Taiwan, where we’ve had the privilege of guiding divers of all levels—not just to explore the ocean’s depths, but to discover the depths within themselves. Over the years, these experiences shaped my belief in what I call the 8 Foundational Pillars of Freediving Training—a framework that’s helped countless freedivers become stronger, safer, and more confident.

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Here’s the best part: these pillars aren’t about grinding harder. They’re about training smarter.

The Skills Graph is a radar chart designed to evaluate a freediver's readiness for their depth goal. It visually maps progress across eight key areas essential for freediving performance: CO2 Tolerance: Ability to handle high levels of carbon dioxide during a dive. Resistance to Hypoxia: Adaptation to low oxygen levels. Rest: Recovery and relaxation strategies. Physical Preparation: Strength and endurance training. Mental Preparation: Focus, resilience, and mindset techniques. Anatomical Adaptation: Adjustments to pressure and depth. Nutrition: Diet's role in energy and performance. Technique: Mastery of diving mechanics and efficiency.

Recovery

Pillar 8

Anatomical Adaptation

Pillar 4

technique

Pillar 3

resistance to Hypoxia

Pillar 2

Physical Preparation

Pillar 6

Nutrition

Pillar 7
Pillar 5

mental hacks

CO  Tolerance

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So, there you have it—the 8 pillars that I’ve seen transform divers time and time again. They’re the heart of my approach to freediving and the foundation of The Depth Collector series.

 

Ready to dive in? Let’s build your freediving journey together.

Join the Club

Join my email list and get access to your free chapter of The Depth Collector

Click here to download

Juan M. Valdivia Valdivia, Neurological Surgeon and AIDA Medical & Science Committee Member

"This book is a masterpiece"
A black and white illustration of an abstract compass design, featuring octopus tentacles forming a circular shape. The tentacles are detailed with suction cups, and the letters "U" and "D" are positioned to indicate up and down directions, set against a solid black background.
A black and white illustration of an abstract compass design, featuring octopus tentacles forming a circular shape. The tentacles are detailed with suction cups, and the letters "U" and "D" are positioned to indicate up and down directions, set against a solid black background.

© 2025 The Depth Collector.

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