It's "common folk knowledge" where I live (Poland) that to be healthy you should "temper yourself" - after hot shower you should follow with cold water for a mi

It's "common folk knowledge" where I live (Poland) that to be healthy you should "temper yourself" - after hot shower you should follow with cold water for a minute or so. I do this (not each time but often) and I like the feeling after the cold shower ends - air feels warm instead of cold, heart is beating very fast, and it's very refreshing. It's probably bad idea if you're not healthy to begin with (thermal shock etc), but if you are healthy it's great.