“For 10 days a year, he sits in silence at a meditation retreat. Before getting dressed each morning, he experiments with using his home infrared sauna and then an ice bath, sometimes cycling through both several times before he leaves home.”
along the same lines.
Or sauna/ice cold baths?
These activities have both been done for decades/centuries and have the backing of scientific studies.
“For 10 days a year, he sits in silence at a meditation retreat. Before getting dressed each morning, he experiments with using his home infrared sauna and then an ice bath, sometimes cycling through both several times before he leaves home.”
along the same lines.