One year ago, I started taking cold showers daily.
What got me started? An year ago, a good friend pointed out that I was wearing five or six layers: a vest, a t-shirt, a sweat shirt, a jacket, a rain jacket. Well, that's somewhat understandable coz we were hiking in redwoods in winters. But that remark left an imprint on me: I felt like a wimp. A few weeks later, I started taking cold showers by turning the shower faucet to the coldest. Zero hot water.
My first excursion in cold water was challenging. Cold water felt pretty cold! By the seventh day, I was kinda comfortable. Over the last one year, I've fallen sick a couple of times with sore throat or flu like symptoms. But these haven't deterred me.
Cold showers are environmentally friendly. They are common in India and other parts of the world where hot water is a luxury. My maternal grandmother always took cold showers. My dad did the same for two years in Delhi where winter temperatures drop to 5C.