What is Pranayama? Prāṇāyāma is the practice of breath control.
Prana means "lifeforce", it is a way of connecting your breath with movement.
Here are Two pranayama (breathing) practices for calming stress and anxiety.
The first one is: Left Nostril Breathing (For calming).
The left side is the moon energy: reflective, calming, cooling, and grounding.
The second pranayama is Breath of Joy.
"This breath work has been found to be particularly effective in managing mood, and will leave you feeling more balanced and refreshed. The practice counters the shallow upper chest breathing of anxiety by inviting the breath to completely fill the lungs." -Amy Weintraub