Pursing your lips as you breathe out is also key. “Breathing out of your mouth through pursed lips allows you to better retain oxygen in your lungs, allowing a greater amount of oxygen transfer to your body and muscles for better function with each breath,” Berghorn explains. It may feel like overkill, but it’s definitely worth it.

Source: www.bustle.com/wellness/how-to-breathe-during-exercise

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