Is breathwork safe?

Gentle, slow breathing is low-risk for most people. Fast breathing followed by breath holds is different: it can make you faint, sometimes without warning. Here's what to know before you practice.

The short version

• Slow, gentle breathing (box breathing, a long exhale, a two-minute reset) is low-risk for most people.
• Fast breathing followed by breath holds can cause fainting, sometimes without warning.
• Never practice breath holds in or near water, while driving, standing or walking.
• Always sit or lie down for anything with fast breathing or holds.
• Stop when it feels wrong, and breathe normally.
• Check with a doctor first if you're pregnant or have a health condition.

Why breath holds after fast breathing need care

Your urge to breathe is driven mostly by carbon dioxide building up in your blood, not by oxygen running low. When you breathe fast and deep, as in power-breathing rounds, you blow off a lot of carbon dioxide. The urge to breathe now takes much longer to arrive, which is why holds after power breathing can be several times longer than usual.

But you don't gain a matching store of oxygen. When you breathe normally, your blood is already close to fully loaded with it. So during a long hold after fast breathing, oxygen can drop far enough for you to black out before the urge to breathe kicks in. On a sofa, that usually means a brief faint. In water, it can be fatal.

Water: the rule that never bends

Hyperventilating before holding your breath underwater is a recognized cause of drowning, including in experienced, fit swimmers. A New York health department review published in the CDC's Morbidity and Mortality Weekly Report described fatal and nonfatal drownings linked to dangerous underwater breath-holding behaviors, with intentional hyperventilation before going underwater as one of them. All four people who died were advanced or expert swimmers who had hyperventilated.

So: no breathwork with holds in the pool, the sea, a hot tub or the bath. Not even "just a short one." Not with someone watching. Simple Breathwork is not a freediving tool, and no breath-hold practice on land should be taken into the water.

Other situations to avoid

• Driving, cycling or operating machinery. Even slow breathing patterns with holds can make you light-headed; fast breathing certainly can.
• Standing or walking. If you faint, you fall.
• Right after a big meal or when very tired. You're more likely to feel unwell.
• Anywhere losing focus could be unsafe, such as near stairs or heights.

Common sensations (and when to stop)

During and after power breathing, it's common to feel:

• tingling in the hands, feet or face,
• light-headedness,
• a buzzing or floating feeling,
• muscle tightness in the hands.

These usually fade when you return to normal breathing. Stop the session and breathe normally if you feel dizzy, faint, confused, nauseous, short of breath, chest pain or any discomfort that worries you. If symptoms don't settle quickly, get medical help.

Who should check with a doctor first

Breathwork isn't for everyone in every form. Talk to a doctor before practicing fast breathing or breath holds if you:

• are pregnant,
• have a heart condition or blood pressure that isn't well controlled,
• have a lung condition,
• have epilepsy or a history of seizures or fainting,
• have a mental health condition, especially panic attacks,
• have had recent surgery, or have any condition you're unsure about.

Slow, gentle breathing is generally the safer place to start for everyone. The beginner's guide explains how to build up.

Good habits

1. Start small. Fewer rounds, a slower pace, shorter holds.
2. Stop at the first strong urge to breathe. Never push a hold to beat a number. Hold times are personal and variable; see average breath hold time.
3. Rest between holds. At least a minute of normal breathing.
4. Stay present. Use haptics or tones so you can close your eyes, but practice where it's safe to do so.

How Simple Breathwork handles safety

The app is built for seated or lying-down practice with your eyes closed, guided by haptics and tones. Each round ends with a 15-second recovery breath. The App Store listing carries the same safety note: never practice in or near water, while driving, or in any situation where losing focus could be unsafe; practice seated or lying down; the app is for general wellness and is not a medical device; consult a healthcare professional if you're pregnant or have any health condition.

The free breath hold timer on this site asks you to confirm you're seated or lying down, on dry land and not driving before it starts, and offers the same recovery breath. The breath retention page explains how guided rounds work.

Source

Boyd C, Levy A, McProud T, Huang L, Raneses E, Olson C. Fatal and Nonfatal Drowning Outcomes Related to Dangerous Underwater Breath-Holding Behaviors, New York State, 1988–2011. MMWR. 2015;64(19):518–521. CDC

General wellness information, not medical advice. Simple Breathwork is not a medical device. Breathing exercises and breath holds can cause dizziness, tingling or fainting: practice seated or lying down, never in or near water, while driving or standing. If you are pregnant or have a heart, lung, seizure or other health condition, talk to a doctor first.