I have encountered anecdotal claims that the act of taking a cold shower fairly frequently (e.g. once a day) improves health, or at least, reduces susceptibility to illness.

Is there any scientific evidence that this does indeed work, even if only for a narrow and specifically define segment of the human population?

I have encountered anecdotal claims that the act of taking a cold shower fairly frequently (e.g. once a day) improves health, or at least, reduces susceptibility to illness.

Is there any scientific evidence that this does indeed work, even if only for a narrow and specifically defined segment of the human population?