Wim Hof "The Iceman" holds over 20 world records and has shown the efficacy of mindset and mind control using breath and cold. His breathing technique is extremely powerful. Warning: This should be performed with a trained professional - I highly recommend you check out the Wim Hof Method workshops and trainings.
Wim Hof Full episode #33: https://podcasts.apple.com/us/podcast/wim-hof-profound-benefits-breath-cold-for-your-health/id1454600603?i=1000445607620