Nadi Shodana

Nadi Shodana Pranayama is an excellent practice to synchronise the sympathetic and parasympathetic nervous system. It helps to lower heart rate and increase heart rate variability. It can be done both at the beginning of the day to start with a calm and equilibrated mind, as well as at the end of the day to reduce excess stress and tension in the body and the mind.
https://insighttimer.com/mindfulhealthyliving/guided-meditations/nadi-shodana