Respiratory vagus nerve stimulation (rVNS) counteracts fight-or-flight stress

I've done this for years - helps me fall asleep on hard workout days.

But I always thought of it as "oxygenating" my body: inhale slowly and fully from top of the lungs down to the bottom of the diaphragm followed by slow and full exhalation. I had no idea I could 'trigger my vagus nerve to squirt out some stress-busting "vagusstoff" as the article states!'

Several thing happen when I breathe like this: in cold weather my body almost immediately heats up (quite dramatic when I'm outside). And I relax!

FWIW I usually sleep w/o covers.

BTW heard yesterday of another study on hot sauna (20 minutes of ~110 degrees Fahrenheit). It speeds recovery - I'll try that after my next weight workout.

Once I did Yoga and the Yoga got anxiety