Normal human breathing at rest should raise the belly, not the chest.
To relax during a particularly stressful moment, take three slow, deep belly breaths to interrupt the fight-or-flight response.

Belly breathing

<ul>
<li>Find a comfortable place to sit or lie down.</li>
<li>Breathe in through your nose and fill your lungs from the bottom up, first expanding your belly, then your chest, and finally raising the collar bones.</li>
<li>Pause.</li>
<li>Then gently exhale from top to bottom, using your stomach muscles to push out the last of the air.</li>
<li>Pause. Then repeat.</li>
</ul>

The belly breath of pranayama

Belief in the benefits of controlled breathing goes back centuries.
Central to ancient Hindu philosophy was prana, described as vital “airs” or “energies” flowing through the body. Stemming from that belief, yoga was built on pranayama or breath retention.

Breathing and yoga

It involves filling the lungs to the max and goes by various names like belly or diaphragmatic breathing.
It has been linked to improved cognitive performance, lower stress levels, and lower blood pressure.

Deep, controlled breathing

In the first half of the 20th century, deep breathing began to emerge on its own as a relaxation method.
Every relaxation, calming, or meditation technique relies on breathing, which may be the lowest common denominator in all the approaches to calming the body and mind.

Breathing in meditations

Breathing is the only autonomic system we can wrest control of.
Controlled breathing techniques can get one autonomic system under control and in turn affect others (like the heartbeat), alleviate momentary anxiety and longer-term emotional stress, and perhaps even improve physical and cognitive health outcomes.

Controlling your breathing

Breathing is at the core of ancient (and currently trendy) mindfulness practices, from yoga and tai chi to meditation.However, studies suggest that breathing exercises alone, derived from those ancient yoga practices, can be good for the body and mind.

Breathing exercises

T ake a few normal breaths. Feel your chest rise and fall? If so, you're doing it wrong, according to breathing therapists and scientists. Make a quick fix there, and maybe introduce a few breathing exercises to your day, and you'll be able to reduce stress, improve your focus, and even lower your blood pressure, among other health benefits.

Breathing and yoga

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The Power of Breathing: 4 Pranayama Techniques Worth Practicing