Usually for one of three reasons. You may not be wound up in the first place, so a technique built to slow you down is pointing the wrong way. You may be breathing bigger rather than slower, which can tip into over-breathing and produce sensations that feel like panic. Or you may be running into relaxation-induced anxiety, a documented paradox where trying to relax raises anxiety rather than lowering it.
None of them mean you are doing it wrong.
Slow breathing is the default advice for feeling bad, and for a lot of people it works. But it is a specific tool for a specific state, and it gets handed out as though it were a general one.
Are you actually wound up, or shut down?
Feeling bad is not one condition. Clinicians who work with arousal usually describe a band in which a person can think and function — Dan Siegel called it the window of tolerance in The Developing Mind (1999) — with two different ways of leaving it.
Above the window is the state most people picture: racing thoughts, a clenched jaw, can’t sit still, can’t stop scanning.
Below it is the other one, and it gets far less attention: flat, foggy, heavy, numb, watching yourself from a distance, unable to start.
Both feel bad. They are not the same, and Pat Ogden and colleagues describe them in Trauma and the Body (2006) as states that need opposite responses.
Slow breathing is a down-regulating technique. Used from above the window, it moves you toward the middle. Used from below it, you are asking a system that has already powered down to power down further.
If deep breathing leaves you flatter, foggier or further away, that is worth taking seriously as information rather than as failure.
Are you breathing bigger instead of slower?
This one is mechanical, and it is probably the most common. “Deep breathing” is nearly always meant as slow breathing — a longer, gentler cycle. Plenty of people reasonably hear it as large breathing and start pulling in as much air as they can, quickly.
Breathing well beyond what your body currently needs lowers the carbon dioxide in your blood — hypocapnia — and that has specific, documented effects. Falling CO₂ narrows the arteries supplying the brain; cerebral blood flow drops by roughly 2% for every 1 mmHg fall in arterial CO₂, which is what produces the light-headedness. The accompanying shift in blood chemistry, respiratory alkalosis, lowers available calcium, and that is what causes the tingling around the mouth and in the fingers and toes. Depersonalisation — a sense of unreality, or of watching yourself — is also described. This cluster is well characterised in clinical references as hyperventilation syndrome (Merck Manual, Professional Edition).
The important part for anyone who has felt it: those manifestations are described in the clinical literature as identical to the typical features of panic. So a breathing exercise done too big and too fast can generate precisely the sensations it was meant to settle — and they are then, very reasonably, read as panic.
If breathing exercises reliably make you dizzy or tingly, the likeliest explanation is size and speed rather than anything about you. Smaller and slower, with the out-breath longer than the in-breath, is the usual correction.
Can trying to relax make you more anxious?
Yes, and it has a name. Relaxation-induced anxiety describes a paradoxical rise in anxiety when someone deliberately tries to relax. It was named in the research literature in the early 1980s (Heide and Borkovec, Journal of Consulting and Clinical Psychology, 1983) and has been studied since, most recently by Michelle Newman’s group at Penn State. Kim and Newman, writing in the Journal of Affective Disorders, found it notably in people with generalised anxiety disorder, and to a lesser degree in major depressive disorder.
One explanation they propose is the contrast avoidance model: for some people, sitting in a calm state is uncomfortable because it creates further to fall if something bad arrives. Staying keyed up feels, unconsciously, like staying ready.
Newman, LaFreniere and Jacobson (2018) also found that how high this spike goes during treatment relates to how well the treatment goes — which is another way of saying that this is a recognised clinical pattern, not a personal failure of technique.
If deliberately relaxing has ever made you feel more wound up rather than less, that experience is documented, it has a name, and you are not the only one.
What does the research actually show?
Worth being careful here, because this is where a lot of writing overreaches. The strongest recent evidence for exhale-focused breathing comes from a randomised controlled trial: Balban and colleagues, “Brief structured respiration practices enhance mood and reduce physiological arousal,” Cell Reports Medicine, January 2023 (PMID 36630953). Participants did five minutes a day for a month, comparing three breathwork protocols against mindfulness meditation. Cyclic sighing — a deliberate double inhale followed by a long, slow exhale — produced the greatest improvement in self-reported mood and the largest reduction in respiratory rate.
That is a real result and it is specific. It is also a one-month study using self-reported mood in a general population, doing a daily practice. It is not evidence that any breathing technique resolves a bad moment, and it says nothing about what to do when you are shut down rather than wound up.
You will also see all of this explained through polyvagal theory. It is influential and widely taught, and it is worth knowing that its empirical support is contested among researchers. The window of tolerance is a more modest claim — a description of states rather than a mechanism — and it is enough to make the practical point.
So what should you do instead?
If slow breathing makes things worse, the useful question is not how do I breathe better but which direction am I actually going?
If you are above the window — wired, racing, clenched — slow breathing is likely to be the right family of tool. Make it smaller and slower rather than bigger, and let the out-breath run longer than the in-breath.
If you are below it — flat, numb, stuck, unable to begin — slowing down further is not obviously the thing. What tends to be used instead is anything that raises activity gently: a sharper breath rhythm, movement, cold contact, or deliberately naming what you can see and hear around you. These are generally used to increase alertness rather than lower it.
And if you genuinely cannot tell which one you are in, that is common, and it is not a character flaw. Guessing and correcting is a reasonable way to work: try something, notice whether it moves you toward the middle or further out, and change direction if it does not.
Neaptide is not treatment, and not a substitute for care from a professional. If you are in crisis, contact your local emergency number.