Day 20 of a 64 day cold plunge challenge. 23°F water.

Sunny day, air temperature 36°F, water temperature 23°F. I'm looking forward to being uncomfortable now.
Cold showers and ice baths are both examples of hormesis—positive stressors that cause the body to push beyond its comfort level and adapt physically and cognitively. Start with water that’s between 50 and 60 degrees. Once you’re ready for your plunge, don’t hesitate — get into the tub with both feet and immediately sit down. Immerse your entire body in water, lie back, and then relax.
The only thing you should be focusing on is slowing down your breathing. If you find it difficult to slow down your respiratory rate, hold your breath at the next inhale and don’t breathe at all for a few seconds.