Diaphragmatic breathing exercise - how to perform deep breathing?

Diaphragmatic breathing exercise has many profits: reduces stress, normalizes heart rate and blood pressure. Learn how to properly perform deep breathing exercise, also called "belly breathing".
Here are the scientific articles about the effectiveness of this technique:
www.sciencedir...
www.ncbi.nlm.n...

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Is this good for lungs and asthma also?

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