Taking breaths that are too big
This is the most common one. You read "breathe deeply" and fill your lungs to the brim on every inhale. Slow isn't the same as huge.
A 2017 review of slow breathing explains that when you lower your breathing rate, each breath has to grow a little to move the same amount of air per minute. A little. If you also make each breath as big as you can, you end up moving more air than your body is asking for. MedlinePlus, the U.S. National Library of Medicine's encyclopedia, describes what follows: carbon dioxide in your blood drops, and you get lightheadedness, tingling in the arms or around the mouth, and the feeling that you can't catch your breath.
The fix is simple: breathe in until it feels comfortable, not until you hit the limit. Your breathing should be quiet enough that someone next to you can barely hear it. If you get dizzy, stop and go back to your normal pace.
Forcing the count
The numbers in a breathing pattern are a reference, not a test. If you reach the end of the exhale desperate for air, or if holding makes your throat clamp down, the count is too much for you today.
You have two ways out. One is to pick a shorter pattern: 2-to-1 breathing goes in for 3 and out for 6, and 4-6 breathing goes in for 4 and out for 6. The other is to adjust the pace in this site's player, which runs from 50% to 200%, so the pattern stays the same but each second gets shorter. Over the weeks, what's hard today tends to get comfortable without you pushing it.
Lifting your shoulders and tensing up
When people try to take in a lot of air, they often hike their shoulders, puff out their chest and clench their jaw. That's tiring, and it doesn't help you breathe slowly.
The same 2017 review cites studies in which breathing with the diaphragm makes slow breathing easier. In practice: drop your shoulders, rest a hand on your belly, and let it rise as you breathe in and fall as you breathe out. This site's Belly breathing is built for that: 4 seconds in, 6 seconds out and a 2-second rest.
Check your face, too. Your forehead, tongue and hands usually give away the effort before your breathing does.
Starting with the most intense patterns
Fast breathing and long holds get the attention, but they aren't the place to start. They call for a body that already knows its own signals. On this site they show a notice before they begin, and it's worth reading.
The same goes for where you practice. Intense breathing is done sitting or lying down, never in water, never while driving and never standing. If you have a heart, lung or blood pressure condition, epilepsy, a history of panic attacks or fainting, or you're pregnant, check with your care provider first.
For the first few weeks, the gentle ones are plenty: 4-6 breathing, belly breathing or Coherent breathing 5-5.
Chasing the perfect ratio
It's easy to burn time hunting for the ideal count. Studies haven't found one. In 2014, an experiment with 30 people saw more relaxation when the exhale was longer than the inhale. In 2024, Meehan and Shaffer compared a double-length exhale with equal timing, at six breaths a minute, in two groups of 26 and 16 people, and saw no difference in heart rate variability. The nine studies they reviewed didn't agree with each other either.
These are small studies and the question is still open. For your practice, that's freeing: the best ratio is the one you can keep up comfortably for several minutes.
Expecting too much, too soon
A session may leave you calmer, or it may leave you with nothing special. Both are normal. Judging the practice by a single day is a common way to end up quitting.
A trial published in 2023 asked 108 adults to practice five minutes a day for 28 days. In the cyclic sighing group, the improvement in mood grew with the number of days practiced. The same trial found no change in sleep or heart rate variability, and its groups were small. The lesson is a modest one: a few minutes, many days, no promises.
And a practice doesn't replace health care. If the dizziness doesn't pass, if you faint or if you feel chest pain, stop the exercise and get professional care.
Frequently asked questions
Why do I get dizzy when I do breathing exercises?
Most often you're moving more air than you need, with breaths that are very big or very fast. That lowers the carbon dioxide in your blood and brings on dizziness and tingling. Stop, breathe normally, and take in less air next time. If the dizziness doesn't pass, see a health professional.
Is it bad to breathe too deeply?
One big breath now and then isn't a problem. What gets uncomfortable is repeating huge breaths for minutes, because you end up overbreathing. In slow practices, aim for a breath that's comfortable and quiet.
How do I know if I'm breathing correctly?
There's no single right way. A few useful signs: still shoulders, a belly that moves, a breath you can barely hear and no urgency to grab air. If you finish without tension or dizziness, you're doing fine.
How long does it take for breathing exercises to work?
It varies from person to person and nobody can promise it. In a 2023 trial, people practiced five minutes a day for four weeks, and in one group the change in mood grew with the days. Start with a few minutes and notice how you feel over several weeks.
What if I can't hold my breath for the full count?
Shorten the hold or pick a pattern with no pauses. You can also adjust the player's pace so each second of the pattern is shorter. Holding your breath should never feel like a fight.
Sources
- MedlinePlus, Hyperventilation, U.S. National Library of Medicine
- Russo, Santarelli and O'Rourke 2017, The physiological effects of slow breathing in the healthy human, Breathe
- Van Diest et al. 2014, Inhalation/Exhalation Ratio Modulates the Effect of Slow Breathing on Heart Rate Variability and Relaxation, Applied Psychophysiology and Biofeedback (abstract)
- Meehan and Shaffer 2024, Do Longer Exhalations Increase HRV During Slow-Paced Breathing?, Applied Psychophysiology and Biofeedback
- Balban et al. 2023, Brief structured respiration practices enhance mood and reduce physiological arousal, Cell Reports Medicine