
Prevent Ear Infection While Diving: The 50/50 Vinegar Mix
DAN's preventive rinse is equal parts white vinegar and isopropyl alcohol, held in each ear five minutes after every session. What works and what does not.
MJ Kühn
Expert tips, techniques, and insights for breath hold training and freediving.

I used to cite two studies to explain why Ujjayi helps your breath hold. When I read them properly, one of them says the opposite of what I claimed. Here is the corrected version, and why Ujjayi is still worth practising.
MJ Kühn

If you're just starting out with breath-holding, there's one thing you need to understand first: It's not about oxygen. It's not about willpower. It's about CO₂. Learn the proper foundation for safe and effective breath hold training.
MJ Kühn

Why a five-minute breath hold in one month is the wrong target, and how to structure safer, repeatable dry-land practice.
MJ Kühn