Breathe With Gert

Gert Leroy Underwater on YouTube provides professional training guidance for freedivers focused on breath control and CO2 tolerance. The channel is run by Gert Leroy, a freediving instructor and former national record holder. Content centers on building a foundation of calm and awareness rather than just chasing depth numbers. His videos cover a wide range of topics, including gear guides, CO2 tolerance tables, and the physiological stages of breath-holding. With 1,580,000 subscribers and 968,243,703 total views as of 2026, the channel maintains a massive reach through 877 videos. Training methods often emphasize structured routines like the 6-Week Breather Challenge and specialized apnea libraries that can be practiced from home without a pool. This channel suits new and returning freedivers who want a disciplined, long-term approach to physical fitness and lifestyle integration. It is not for those who prioritize rushing into advanced dives without mastering breathwork safety. Visit the Gert Leroy Underwater channel to explore his latest training insights.