>>1730733It's all real, as evidenced by the multiple controlled experiments that have been done. Watching this video where Wim is interviewed by one of the most well-sourced PhD health researchers in the field will explain it.
https://www.youtube.com/watch?v=389c31dD9xg&feature=emb_titleSee also: Hormetic stressors, sauna use and heat-shock proteins, Wim's proof-of-concept demonstration where he leads a successful mountain summiting with a group of brand-new students; in only their shorts...