Does Belly Breathing Help Anxiety? How Diaphragmatic Breathing Works

Belly breathing, also called diaphragmatic breathing, may help with stress and focus when practiced for weeks, and it is a gentle starting point for anxiety. You breathe so your belly rises on the inhale and falls on the exhale. Pairing it with a longer exhale is a good combination.

Below you will find how to do it, the evidence from a small 8-week trial, how it differs from long-exhale breathing, and who should be careful.

Does belly breathing help anxiety?

It may help with stress and attention, with modest evidence. In an 8-week randomized trial of 40 healthy adults, one group did 20 sessions of diaphragmatic breathing (15 minutes of rest and 15 minutes of belly breathing each time), and the other group did nothing between tests. The breathing group improved more on a test of sustained attention and had lower saliva cortisol, a stress hormone, afterward. Negative mood fell in the breathing group, but the group difference was only borderline, not clearly significant (Ma et al., 2017).

That is one small study of healthy people, not people with an anxiety disorder, and the control group did no activity at all. A review of belly breathing in children and teenagers also found mixed results for anxiety, with better results for stress (Tsakona et al., 2025). So the evidence is encouraging, not settled.

Belly breathing versus chest breathing

Your diaphragm is a dome-shaped muscle under your lungs. When it contracts, it moves down, your lungs fill, and your belly gently pushes out. In chest breathing, the upper chest and shoulders do more of the work, and the breaths tend to be quicker and shallower.

When anxious, many people shift to quick chest breathing, which can feel like tightness. Belly breathing tends to be slower and steadier, which makes it easier to settle into a calm pace. A 2018 review of slow breathing in healthy adults linked it to more relaxation and less anxiety and arousal, while noting that the exact mechanisms are still debated (Zaccaro et al., 2018). Belly breathing is about where the breath goes, and long-exhale breathing is about timing. They fit together.

How to practice belly breathing

Practice lying down first, then sitting.

1. Lie on your back, knees bent. Place one hand on your upper chest and one on your belly, just below your ribs.
2. Breathe in through your nose for 4 seconds. Aim for the lower hand to rise more than the upper one. Keep the breath easy.
3. Breathe out slowly for 6 seconds. Let the belly fall. Soft lips or through the nose.
4. Repeat for 5 to 10 minutes. If the chest hand moves more, do not worry. Just send the next breath a little lower.
5. Try it sitting once the lying version feels natural, then in a chair at your desk or in the car.

If your belly does not move, relax your stomach muscles. Many people hold their belly in all day. If you feel dizzy, make the breaths smaller. Three in and four out is fine for a start.

When belly breathing is hard to learn

Some people find belly breathing awkward at first, and that is common. Years of sitting, tight clothing and habitual stomach-holding can make the belly feel stuck. A few small fixes help.

Loosen your waistband and sit or lie in a position where your stomach is not squeezed. Breathe through your nose, because it slows the pace naturally. If you are still struggling, try lying face down for a minute and feel your belly press into the surface on each inhale. Then roll over and repeat the feeling.

It also helps to know that you do not need a perfect belly breath to get the calming effect. The slow pace and the longer exhale matter, and the belly movement is a useful guide to keep the breath low and easy. If your chest rises a little too, that is fine.

What the research shows

• 8 weeks of diaphragmatic breathing, 40 healthy adults: better sustained attention and lower salivary cortisol than a no-activity control. The negative-affect improvement was borderline. It was a small pilot (Ma et al., 2017).
• Children and teenagers, 13 studies: stress improved in most, anxiety results were mixed, and the review could not name a best protocol (Tsakona et al., 2025).
• Slow breathing in healthy adults, 15 studies: linked to more relaxation and less anxiety and arousal, with debated mechanisms (Zaccaro et al., 2018).
• Breathwork overall, 12 trials, 785 adults: a small to moderate drop in stress, with risk-of-bias concerns (Fincham et al., 2023).

The takeaway: belly breathing is a sensible, low-risk practice with early, modest support. It is not proven better than other slow breathing.

Common mistakes

• Pushing the belly out hard. The movement should be soft and natural, not forced.
• Taking huge breaths. Easy, moderate breaths work better and avoid dizziness.
• Tensing the shoulders. Keep them low and loose.
• Judging it by the first day. Skill and benefit build over weeks.
• Forgetting the exhale. A slow, longer out-breath is where much of the calm comes from.

Who should be careful

• People with panic disorder: avoid breath holds and fast, deep breathing. Use gentle belly breathing at an easy pace.
• People with asthma or another lung condition: avoid forceful breathing and check with your doctor.
• People with recent abdominal or chest surgery, or a hernia: ask your doctor before practicing belly breathing.
• Anyone who feels dizzy, tingling or faint: stop and breathe normally.
• Anyone with frequent or severe anxiety: please see a doctor or therapist. Breathing supports care and does not replace it.