Nadi Sodhana Pranayama

You begin in a seated cross legged position, your spine stretched and back straight. With your thumb, pressed down on your right nostril, use your left nostril to breathe in deeply.

Hold your breath for a beat and then switch your thumb so that you are now pressing down on your left nostril, and then exhale from your right nostril.

Repeat this process, alternating between your nostrils by breathing in through one and exhaling through the other. You can repeat this 10-15 times.