I'm up to five days in a row now. Five days where, at the end of my shower, I turn the dial way over to the cold side and spend the last 30 seconds under an icy flow, willing myself to breathe normally.
Is it a fad? Is it a "lifehack"? Does it do any good?
Anecdotally, yes to the last question! This morning, I was feeling anxious, but I feel better after doing the above. It's like a switch, turning off the mental buzzing, and forcing you to feel instead of think. The cold shower has a powerful physiological effect, and I just feel better.
I haven't delved deep into the scientific literature at all, only seen recommendations here and there on the internet, and I have a friend who's done some cold dunking in an actual river, which is a far cry from what I call my "transition" showers going from hot>cold. But yes, I can confirm, having some semblance of a cold shower has a positive effect on my mood.
So even if it's a fad, a "biohack", or whatever other term you wanna label it, I'm going to keep up with this newfound routine. It gets easier to do the more you do it.
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Weather's been crazy. It was summer-hot a couple days ago, pushing 28 degrees celsius, and now it's back down to 4... Mother nature's mood swings in tandem with climate change, I guess.