Abdominal breathing: the basic technique for regulating your nervous system

Abdominal breathingisnatural breathing—the kind you did as a baby—and it engages your diaphragm to its full extent. It has also become rare: in adults who are stressed, sedentary, or anxious, breathing has gradually shifted to the chest, becoming faster, shallower, and unable to properly stimulate the vagus nerve. This article explains exactly whatabdominal breathing is, why it affects so many bodily functions, how to regain it, and how it relates to cardiac coherence.

Abdominal or chest breathing: the difference that makes all the difference

Every breath consists of two alternating movements: an inhalation, when air enters, and an exhalation, when air leaves. What distinguishesabdominal breathingfromchest breathing is the muscle involved.

• Chest breathing: the ribs rise, the shoulders lift, and the chest expands. The abdomen remains largely still. This is “stress” breathing—rapid and shallow—which fills the upper part of the lungs but leaves the lower part unused.
• Abdominal breathing: Thediaphragm(the large dome-shaped muscle beneath the lungs) moves downward as you inhale, pushing the internal organs downward and causing the abdomen to expand. As you exhale, the diaphragm moves upward, and the abdomen contracts. The rib cage moves very little, and the shoulders remain still.

The difference is not merely aesthetic. By engaging the lower two-thirds of the lungs, the diaphragm involves a volume of air far greater than that of chest breathing. Above all, diaphragmatic movement provides a mechanical massage to the abdominal organs and stimulates the afferent fibers of the vagus nerve that run through this area. It is this vagal stimulation that triggers the regulatory effect on the autonomic nervous system —and thus on anxiety, sleep, digestion, and blood pressure.

Why (Almost All of Us) Have Lost Our Ability to Breathe from the Abdomen

A baby breathes spontaneously through the abdomen—watch them sleep, and you’ll see their belly rise and fall. In adults, this process becomes disrupted for a combination of reasons:

• Chronic stress.Whenthe sympathetic nervous system is activated, the body prepares to fight or flee. Breathing quickens and becomes shallow. If the stress persists, this pattern becomes the default state.
• A sedentary lifestyle and sitting posture.Working8 hours a day hunched over a screen compresses the diaphragm. The muscle loses its range of motion simply from lack of use.
• The "flat stomach" effect. Socialpressureto suck in one's stomach—especially among women—causes the abdominal muscles to remain constantly contracted, which prevents the diaphragm from dropping.
• Wearing clothes that are tight around the waist.Belts, jeans, compression underwear: anything that constricts the abdomen also restricts breathing.
• Anxiety, trauma, chronic fear.Thediaphragm contracts in response to a strong emotion. When the emotion isn’t resolved, the contraction becomes chronic—this is known as a “blocked diaphragm.”

Good news: since abdominal breathing is an instinctive response that we’ve lost, it can be relearned. The diaphragm is a muscle; it can be retrained. Conscious practice for 10 to 20 minutes a day is enough to reestablish the reflex in just a few weeks.

The documented benefits of abdominal breathing

Abdominal breathing—often referred to asdiaphragmatic breathing—is one of the best-documented non-pharmacological interventions of the past decade. Here are the areas with the strongest evidence:

• Stress and cortisol.Maet al. (2017,Frontiers in Psychology) demonstrated that an 8-week abdominal breathing program significantly reduced salivary cortisol levels and improved sustained attention.
• Anxiety and depression.The2020 Lehrer meta-analysis (58 randomized clinical trials) documents an effect on anxiety that is “comparable to established treatments” when slow breathing is practiced at the appropriate intensity.
• Gastroesophageal reflux.TheMayo Clinic controlledtrial(Halland et al., 2021) shows an86% reduction in postprandial reflux episodesamongpatients who practice abdominal breathing daily. The 2012 Eherer study confirms these findings.
• Mild hypertension.TheCheng 2026 meta-analysis (13 studies, 1,097 patients) reports an average decrease of−7.7 mmHg in systolic blood pressurewithslow, predominantly abdominal breathing.
• Chronic inflammation.Twalet al. (2016,BMC Complementary and Alternative Medicine) observed a decrease in pro-inflammatory biomarkers (IL-6, TNF-α) following a session of diaphragmatic breathing.
• Chronic pain and low back pain.Meta-analysisof 14 trials (Zhai 2024): Diaphragmatic breathing reduces pain intensity and improves mobility, with the maximum effect observed after more than 500 minutes of cumulative practice.
• Cognitive performance.Bahameishand Stockman (2024) demonstrated an improvement in working memory after 20 sessions of guided breathing.

The mechanism underlying all these benefits isthe activation of the vagus nerve through diaphragmatic movement, which helps restore balance to the autonomic nervous system. For more scientific details, visitour Science page.

How to Practice Diaphragmatic Breathing: A 5-Step Exercise

Here is the basic exercise. It’s not complicated—the only challenge is remembering to do it and sticking with it over time.

1. Make yourself comfortable

Sit upright in a chair with your feet flat on the floor, or lie on your back. For beginners, lying down makes it easier to feel the abdominal movement.

2. Place your hands down to feel

Place one hand flat on your stomach, just below your belly button. Place the other hand on your chest, at the level of your sternum. This is your guide: during the exercise, only the hand on your stomach should move up and down. If the hand on your chest moves a lot, you’re still breathing from your chest.

3. Breathe in through your nose for 4 to 5 seconds

Slowly, without straining. Imagine you’re inflating a balloon inside your belly. The hand on your belly rises. The hand on your chest should remain almost still. It’s the diaphragm that lowers and pushes your internal organs forward.

4. Exhale through your nose or mouth for 5 to 6 seconds

Let the air out slowly. Your belly deflates, and your hand moves down. Don't pause at the end: move right into the next inhale.

5. Stick to a consistent schedule

For immediate relief (to relieve stress or help you fall asleep): 5 minutes is enough. For long-term relief from anxiety, sleep issues, or chronic pain:15 to 20 minutes a day for 4 to 12 weeks.

Quick test: Are you really breathing from your belly?

Many people think they are practicing abdominal breathing when they are actually still breathing from the chest. Here are three tests to check:

• The hand test. Placeonehand on your stomach and one on your chest, and breathe normally. Which hand moves the most? If it’s the one on your chest, your breathing is primarily thoracic.
• The mirror test.Standwith your shirt off in front of a mirror. When you inhale, do your shoulders rise? Does your chest rise noticeably? If so, you are using your accessory breathing muscles rather than your diaphragm.
• The lying-down test.Lie downand place a book on your stomach. As you inhale, the book should rise. As you exhale, it should fall. If it doesn’t move, or moves very little, your diaphragm isn’t working.

If the tests show that you have developed chest breathing, don’t be discouraged: this is the case for the vast majority of Western adults. It takes a few weeks of conscious practice to correct this.

Abdominal or diaphragmatic breathing: is there a difference?

In practice, the two terms refer to the same thing.Diaphragmatic breathingisthe scientific term used in medicine, physical therapy, and physiology.Abdominal breathingisthe more common, visual term used in sophrology, yoga, and meditation. The movement described is identical: as you inhale, the diaphragm moves downward, causing the abdomen to expand.

Some authors distinguish between "diaphragmatic breathing"—which involves an even wider range of movement (including the sides and lower back)—and strict abdominal breathing. In practical terms, this distinction has no practical significance.

On the other hand, abdominal breathingcomplementscardiac coherencebutis not the same thing:

• Abdominal breathing refers to thetypeofbreathing that uses the diaphragm rather than the chest.
• Cardiac coherence refers to thebreathingrhythm (6 cycles per minute).

A true cardiac coherence practice combines both: you breathe at a rate of 6 breaths per minute,andyoudo so using your diaphragm. It is this combination that fully activates the vagus nerve.

How long should you practice abdominal breathing?

The Kwon 2025 systematic review (48 randomized clinical trials on diaphragmatic breathing) makes it clear: the effects aredose-dependent. In short:

• 5 minutes: immediate effect. Soothing during and immediately after. No long-lasting benefits.
• 10 to 15 minutes: moderate effects; the minimum duration required to see benefits from multiple sessions.
• 15 to 20 minutes:the dose used in clinical trials. This is the dose that produces lasting effects on anxiety, depression, blood pressure, pain, and sleep. When taken daily for 4 to 12 weeks, it rebalances the baseline tone of the autonomic nervous system.
• 20 to 40 minutes: dose used in supervised treatment protocols (PTSD, severe anxiety disorders).

For a healthy adult who wants to prevent stress and improve sleep, the goal is20 minutes a day. This is what we call Deep Vagal Breathing™ when paired with a 6 bpm rhythm.

The Neoflo Belt: Feel Your Diaphragm Move

The main challenge with abdominal breathing isn’t the technique itself—it’smaintaining it for 20 minutes without slipping back into chest breathing. Without sensory cues, your focus wavers after a few minutes, the diaphragm rises, and you fall back into your usual pattern without even realizing it.

This is precisely the problem that theNeoflo breathing belt solves. Three haptic motors, positioned directly on the abdomen, vibrate as you inhale and exhale. This stimulation serves two complementary purposes:

• Screen-free rhythmic guidance.Youfollow the vibrations through touch, without any visual or cognitive effort. No phone, no app. A study by Bouny et al. (2023,*Sensors* journal) demonstrated that tactile guidance doubles the cardiac coherence index compared to visual guidance (0.55 vs. 0.28).
• A constant proprioceptive cue.Thevibrations on the abdomen continuously remind you where to breathe. This provides direct sensory feedback to the diaphragm—exactly the area that needs to be engaged. Schools of therapeutic breathing have long used manual techniques (placing hands on the patient’s abdomen) to achieve this same effect; neoflo automates this process.

In practical terms, you put on the belt, start the session, and close your eyes. Twenty minutes later, your diaphragm has really worked hard, your nervous system is in parasympathetic mode, and you’ve mastered the technique. As the weeks go by, the abdominal reflex becomes second nature outside of sessions, becoming part of your everyday breathing.

The Neoflo belt was invented by a biomedical engineer and co-developed with Dr. Thomas Cantaloup, a physician. It won the bronze medal at the 2024 Lépine Competition. It comes with an online training course and an 8-week support program.

Discover the Neoflo belt → 30-day “satisfaction guaranteed or your money back” trial, with free shipping and returns.

FAQ — Abdominal Breathing

What is abdominal breathing, and how does it work?

Abdominal breathing is a type of breathing that engages thediaphragmratherthan the rib cage. When inhaling, the diaphragm moves downward and causes the abdomen to expand; when exhaling, it moves upward and the abdomen deflates. This mechanism engages the lower two-thirds of the lungs and directly stimulates the vagus nerve, which activates the parasympathetic nervous system (recovery, calm, digestion).

What are the main benefits of abdominal breathing?

Scientifically documented benefits: reduced stress and cortisol levels (Ma 2017), relief from anxiety and depression (Lehrer 2020, 58 RCTs), lower blood pressure (Cheng 2026, −7.7 mmHg on average), reduction in acid reflux (Halland 2021, −86%), reduction in chronic pain (Zhai 2024), and improved sleep and attention. All these effects occur through the same mechanism: regulation of the autonomic nervous system via the vagus nerve.

How can I tell if my diaphragm is stuck?

Three signs: you naturally breathe using your chest (shoulders rise, chest lifts, abdomen remains still); you have trouble expanding your abdomen when you try to do so consciously; you feel tension or a tight spot below your sternum when you take a deep breath. A blocked diaphragm is very common in people who are anxious, sedentary, or have experienced trauma. It can be released through regular practice; a physical therapist or osteopath can provide additional support.

Is guided breathing more effective than practicing on your own?

Technically speaking, no: proper abdominal breathing is still proper abdominal breathing. In practice, yes—especially for longer sessions. The Bouny 2023 study found a doubling of the cardiac coherence index with tactile guidance compared to without guidance. And the main challenge isn’t the technique; it’sconsistency and duration: a tool that makes the 20 minutes easy to stick with automatically improves adherence—and thus results.

How long does it take to see results?

The acute effects (immediate calm, slowed heart rate) are felt as early as the first session. Long-term benefits emerge after4 to 12 weeks of daily practice, at a duration of 15–20 minutes. This is the consensus conclusion of the meta-analyses by Kwon (2025) and Lehrer (2020).

Can you practice abdominal breathing while walking or working?

Yes, for short practice sessions (a few cycles at the computer, while waiting at a red light, on public transportation)—it’s actually excellent for retraining your reflexes in daily life. But these short practice sessions don’t replace the 20-minute session that produces a deep regulatory effect. Think of them as complementary.

Abdominal breathing and belly fat loss: Is there a connection?

Not directly: abdominal breathing doesn’t “flatten your stomach” in the sense that it doesn’t burn a significant number of calories. However, it does improve posture (a toned diaphragm leads to a straighter spine), reduces stress-related bloating (by affecting digestive motility), and lower cortisol levels help limit abdominal fat storage over the long term. Indirectly, then, yes—but not through a “magic abs” effect.

Take control of your breathing

Abdominal breathing isn’t some esoteric technique—it’s your natural way of breathing, which you’ve lost along the way. Rediscovering it is one of the simplest and best-documented ways to regulate your nervous system. TheNeoflo beltmakesiteasierby guiding your diaphragm through touch—no screen, no mental effort, just 20 minutes a day.

Discover the Neoflo belt →

neoflo is a wellness tool. It is not a medical device and is not a substitute for medical advice, diagnosis, or treatment. If symptoms persist, consult a healthcare professional.