Sir, I live in the north. Adapted or not, no one moves if they can avoid doing so in the winter.
Worst part about it is when you need to do something outdoors ~ like chop wood, saw boards ~ and you get all warmed up and it's coming down ~ it kind of stings bare skin if it gets heavy ~ and then it melts and gets your trousers wet.
Sometimes I have to put a T-shirt on.
I recall this time in the Army when we were going to do a "river crossing" exercise. The river had frozen over and was several inches thick. The command asked for someone to go out there and jump up and down and break the ice so folks could maneuver the boats and equipment.
Well I stepped right out ~ and this long line of guys actually did kind of step back.
Took me about 15 minutes of jumping up and down and breaking up the ice. You'd hear this low moan coming from the other soldiers as I climbed up on another section of ice and got it broken.
Eskimos are certainly as well adapted.