That might be the case for a few days. However, after a few weeks taking cold showers becomes a habit and part of someones new comfort zone. I guess randomly replacing one shower a week with a cold shower might take longer to get used to, but it's still meaningless IMO.
PS: As someone that used to regularly swim in water colder than most peoples tap water I can say it's not really that big a deal until your core temperature drops and a normal shower is not going to do that.
That might be the case for a few days. However, after a few weeks taking cold showers becomes a habit and part of someones new comfort zone. I guess randomly replacing one shower a week with a cold shower might take longer to get used to, but it's still meaningless IMO.
PS: As someone that used to regularly swim in water colder than most peoples tap water I can say it's not really that big a deal until your core temperature drops and a normal shower is not going to do that.