During the quarantine, I've been doing this magical breathing exercise. Only 10 minutes a day and it's changed my life. I reconnected my mind to my body. It's a natural "high" because you send oxygen to all your cells in 3 quick rounds of breathing and then holding your breath. It raises your natural immunity and lifts your mood by flushing toxins out your system!
First timers will be shocked they can hold their breath for over a minute.
Try the Wim Hoff method here: