Cold showers science: Increased dopamine?

An older study, this time from 2000 - Trusted Source, investigated the effects of different water temperatures on bodily reactions. In the cold water condition, the researchers submerged participants in 57.2°F (14°C) water for 1 hour. The participants experienced the following effects (some of which may not necessarily be beneficial to health):

increased metabolism, increased heart rate and blood pressure, increased levels of the neurochemicals dopamine and norepinephrine, lower levels of cortisol, the “stress hormone”

medicalnewstoday com/articles/327461#cold-showers

So far around 20 out of last 23 days every morning starts with cold shower.

Stopped around 2y ago, I remember it as good period.