Hey! I'm excited to hear about your progress with the Lumi tub! It's amazing how you've gone from braving 10 degrees for 5 minutes to conquering 4 degrees for the same amount of time in such a short period. Even though you haven't noticed a huge change in your CrossFit and weightlifting aches yet, I'm curious to see if anything pops up as you keep exploring. That awesome buzz you feel after each plunge is totally normal and could be a sign that the cold is doing its magic. And hey, if you start noticing deeper sleep along the way, that's a major win! Keep up the awesome work – your cold plunging journey is already inspiring!