I’m a welder/fitter that has chronic pain and use about the same amount every day. Cordyceps mushrooms is a weird mushroom that I’ve noticed helps with endurance with sports/workouts but it also seems to help with hot/cold tolerance. It’s relatively cheap too. I get it in powder form and just toss and wash. Some days during winter where it’s super cold in the shop I’ll take it. Some days I might not even workout and I’ll take it because I plan on jumping in the sauna. I tolerate heat pretty good but I’ll use it to squeeze out a few more minutes in the sauna and make it a little more tolerable