I often take cold showers and I also usually go under the cold water suddenly because I think it makes me stronger and makes me have more control over my nerves. I can imagine it could be bad for people with heart conditions but I'm talking about healthy mid-age people.
I was wondering if it is good or bad for healthy mid-age people to suddenly go under a shower with water temperature of around minimum 20 degree Celsius from room temperature of max 40 Celsius.