Cold and Heat Adaptation
Exposure to extreme cold can significantly boost norepinephrine levels, enhancing mental and physical performance. However, frequent cold or heat exposure leads to adaptation, diminishing the hormonal benefits over time. To maximize growth hormone increases from deliberate heat exposure, it's recommended to space out sessions, ideally to once a week or every ten days, to maintain the element of shock that triggers these hormonal responses.In this clip
From this podcast

Huberman Lab
The Science & Health Benefits of Deliberate Heat Exposure | Huberman Lab Podcast #69
Related Questions
Can one do deliberate cold exposure too frequently as discussed in the episode The Science & Health Benefits of Deliberate Heat Exposure | Huberman Lab Podcast #69 and the clip Cold and Heat Adaptation
If you start doing deliberate heat exposure more often, what impact will it have on growth hormone as mentioned by Andrew Huberman?
What does Dr. Andrew Huberman say about cold exposure in the episode The Science & Health Benefits of Deliberate Heat Exposure | Huberman Lab Podcast #69 and the clip Hormesis and Metabolism