Diaphragmatic Breathing

How to do diaphragmatic breathing

Diaphragmatic breathing — also called belly breathing, abdominal breathing, or deep belly breathing — engages the diaphragm, the dome-shaped muscle below your lungs. When you breathe from your diaphragm, your belly rises and falls while your chest stays relatively still.

1. Sit or lie down comfortably.
2. Inhale slowly through your nose for about 4 seconds. Your belly should rise while your chest stays almost still.
3. Exhale gently through pursed lips for about 6 seconds. Feel your belly fall.
4. Repeat for 5–10 minutes, 1–3 times per day.

Optional check for beginners: place one hand on your chest and one on your belly. The hand on your belly should rise on the inhale; the one on your chest should barely move. Once you feel the difference, you can drop the hands.

Common cues for the right technique: breathe from your diaphragm, breathing from stomach, tummy breathing. If you only feel your chest moving, you're using accessory muscles instead of the diaphragm.

Diaphragmatic breathing for anxiety

Slow diaphragmatic respiration is one of the most-studied tools for anxiety. By extending the exhale and breathing low into the body, you stimulate the vagus nerve and shift the autonomic nervous system from sympathetic ("fight or flight") toward parasympathetic ("rest and digest"). Most people notice a measurable drop in heart rate within 60–90 seconds.

Practice diaphragmatic breathing for anxiety daily, not just during anxious moments — regular abdominal breathing for anxiety strengthens vagal tone over time, raising your baseline resilience to stress.

For deeper exploration of vagal stimulation, see our guide to vagus nerve exercises.

Benefits of diaphragmatic breathing

• Reduces resting heart rate and blood pressure
• Improves oxygen exchange and lowers minute-ventilation
• Lowers cortisol with regular practice
• Helps with sleep onset, especially with longer exhales (e.g. 4-7-8)
• Supports core stability and posture
• Eases tension headaches and shoulder tightness from chronic chest breathing

Diaphragmatic breathing benefits compound with practice: a few minutes daily produces effects that single sessions cannot.

Diaphragmatic breathing for COPD

For people with chronic obstructive pulmonary disease (COPD), abdominal breathing exercises — especially combined with pursed-lip exhalation — can reduce breathlessness, improve gas exchange, and increase exercise tolerance. The American Lung Association includes diaphragmatic breathing among its recommended COPD breathing techniques.

If you have COPD or another respiratory condition, please practice diaphragmatic breathing for COPD under guidance from a pulmonary rehabilitation team. This timer is general-purpose and is not a clinical tool.