Should You Do Wim Hof Breathing Before Bed?

People arrive at this question for a good reason. Breathing exercises are widely recommended for sleep, Wim Hof breathing is the breathing exercise they know, and it seems to follow that doing it at bedtime would help. It usually does not, and understanding why makes the alternative obvious.

What the practice is actually doing

Wim Hof breathing is a deliberate activation. The rounds of deep breathing raise adrenaline — this has been measured directly, and it is not a side effect but the mechanism the method depends on. The warmth, the alertness, the tingling and the clear head afterwards are all downstream of that surge.

Adrenaline is a fine thing at seven in the morning. At eleven at night it is working directly against the process you are trying to start. Falling asleep requires your sympathetic nervous system to stand down; this practice calls it up.

So if you have tried a session before bed and then lay awake feeling wired and slightly wonderful, nothing went wrong. That is the practice doing precisely what it does.

The part that confuses everyone

Plenty of practitioners will tell you the method improved their sleep, and they are not mistaken. The confusion is about when they practise.

A morning session appears to help sleep that night, through the ordinary machinery of circadian rhythm: a strong signal of activation early in the day makes the descent into evening cleaner. Regular practitioners often report falling asleep faster within a few weeks of starting — from a practice they do before breakfast.

There is also a smaller group who practise in the early evening, three or more hours before bed, and sleep well. That works because the activation has passed by bedtime, leaving the settled feeling that follows a session. Three hours is roughly the margin; less than that is a gamble.

What to do at bedtime instead

Slow breathing, with the exhale longer than the inhale, and no breath holds at all.

The reason this works is close to the reason the other does not. When you breathe out slowly, your heart rate drops slightly with each exhale, and your nervous system reads the pattern as evidence that nothing is wrong. Extend the exhale and you extend the signal. Nothing else about the technique matters very much.

The simplest version needs no counting: breathe in normally, and let the out-breath take about twice as long, without straining. If you prefer structure, the 4-7-8 pattern — in for four, hold for seven, out for eight — is the well-known version and does the same job. A guided session does it for you, which is easier still, since the point is to stop managing anything.

Do it lying down, in the dark, already in bed. There is no reason to sit up for this, and falling asleep partway through is a success, not a failure.

Building the two into a week

The arrangement that works for most people is simple enough to describe in a sentence: the activating practice in the morning, the slow practice at night, and nothing in between that needs deciding.

If you only have time for one, and sleep is what you are trying to fix, choose the slow evening practice — it works on the problem directly. If your sleep is broadly fine and you want energy and stress tolerance, take the morning session. Doing both, most days, is where practitioners tend to end up after a few months.

When breathing is not the answer

Breathing exercises help with the ordinary difficulty of a busy mind at bedtime. They do not fix sleep apnoea, chronic insomnia, or the sleep disruption that comes with depression, anxiety disorders or shift work. If you have been sleeping badly for weeks and cannot find a reason, that is worth taking to a doctor rather than to a breathing app.

Never practise breath retention in or near water, or while driving. Always sit or lie down. Not suitable during pregnancy, or if you have epilepsy, a heart condition, high blood pressure or a history of fainting — speak with your doctor first.