Controlled breathing is inexpensive, portable, and generally low risk. Research suggests diaphragmatic and slow-breathing practices can modestly reduce self-reported stress and may lower heart rate or blood pressure in some people. The evidence varies by technique and study quality.
The simplest method
- Sit with your back supported and feet on the floor.
- Breathe gently through your nose if comfortable.
- Let the abdomen expand without forcing an enormous breath.
- Inhale for about four seconds and exhale for about six.
- Continue for five minutes, staying relaxed.
This is roughly six breaths per minute. The longer exhale is a cue to slow down, not a contest. If counting makes you tense, simply make the exhale a little longer than the inhale.
When to use it
- Before a blood-pressure measurement
- During a stressful work transition
- As part of a wind-down routine
- Between demanding sets once breathing has stabilized
- Before a difficult conversation
What it does not do
Breathing exercises do not “flood the brain with oxygen” in a healthy person, erase chronic stress, or replace blood-pressure medication. Fast or forceful breathing can cause lightheadedness by changing carbon dioxide levels. More intense methods are not automatically more effective.
Safety
Stop if you become dizzy, numb, panicky, short of breath, or develop chest discomfort. Avoid prolonged breath holds or vigorous hyperventilation around water, while driving, standing at height, or operating equipment. People with significant heart or lung disease should ask their clinician which practices are appropriate.