11 Tricks that Give You Power Over Your Body
Calm your nerves by blowing on your thumb.
Why it works: When you try to exhale through a nearly blocked airway, your intrapleural pressure gets increased. This stimulates your vagus nerve that controls your heart rate. There's one more reason why this trick might work on you - your thumbs have their own pulse, so when you blow on them, it affects your overall pulse as well.
