Wim Hof style rounds
Thirty full breaths, then let everything out and stay empty for as long as it stays comfortable. One deep breath held for fifteen seconds closes the round. Three rounds.
Read this first
Never in water, near water, or in a bath — not even shallow water. Breathing hard first lowers your blood CO2, and CO2 is what creates the urge to breathe; it does not meaningfully raise your oxygen. So the alarm goes quiet while the oxygen keeps falling, and people pass out with no warning at all. At least thirteen drownings have been documented among people practising this, and a coroner ruled one of them accidental drowning in a 2022 case involving a seventeen-year-old. Never while driving, standing, or in any water.
Sit or lie down before you start, every time. Fainting is a normal outcome of this pattern, not a sign you did it wrong, and the whole risk is where you are when it happens.
The pattern
Sitting or lying down, at home, with nothing after it. It is stimulating, not calming — this is not the one for bedtime or for a hard moment.
What is known
It reliably changes what your body is doing — adrenaline up, blood CO2 down, blood briefly less acidic. Whether that adds up to a health benefit is much less settled than the popular version suggests, and the trials are small and mostly unblinded.
This one is not open on the page
Every other practice here runs straight away with no account. This one asks you to tick four lines about where your body will be first, and that answer has to live somewhere, so it needs an account. It is the only thing on this site behind a wall, and that is deliberate.