@adamhurwitz.eth
The theory is that you train the nervous system involuntarily when practicing it twice a day.
> You change the tone of the autonomic nervous system. You decrease sympathetic tone, increase parasympathetic tone, the relaxation response. [2]
Healthline is a great resource and the long conversation with Dr Weil and Tim Ferriss. [3][4]
[2]: https://www.youtube.com/watch?v=yP9vY4NTRqE&t=3189s
[3]: https://www.healthline.com/health/4-7-8-breathing
[4]: https://play.pocketcasts.com/podcasts/046f9e00-a81a-0131-c656-723c91aeae46/d2a9a915-fe31-48de-b729-afe5cd90f473.
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