Training Featured
Find Your Breath-Hold Baseline: A Free Interactive Test (No Water Needed)
Before you train, measure. A guided dry test — paced breathing, one relaxed max hold — and an honest reading of what your result means.
5 min read
Breathwork
Kumbhaka: What Yogic Breath Retention and Freediving Have in Common
Pranayama’s retention and a freediver’s CO₂ table are the same mechanism in different vocabularies. What holds up under measurement — and what does not.
5 min read
Training
Breath-Hold Training for Spearfishing: A Beginner's Dry-Training Plan
You need less bottom time than you think — and CO₂ tolerance, not lung volume, is what is holding it back. A full six-week dry plan.
5 min read
Technique
Apnea Walks: The Dry CO₂ Training You Can Do Anywhere
Movement makes CO₂ faster. Apnea walks turn that into the most time-efficient dry tolerance session there is — with a configurable interval timer.
4 min read
Science
What Science Says About Breath-Hold Training: 4 Studies in Plain English
Four peer-reviewed studies, no hype: what breath-hold training actually changes, how fast, and which popular claims the measurements refuse to back.
5 min read
Training
CO₂ Tables Explained: The Science of Training Your Urge to Breathe
The urge to breathe is a CO₂ alarm, not an oxygen alarm. Here is how CO₂ tables train that alarm — and how to build one from your current max.
7 min read