I'm noticing slightly opposite and I'm in my mid-50's: I'm tolerating a bit more colder temp. since moving to prairies from Vancouver 3 yrs. ago. (Even I can't believe I'm like this.) In fact, I get an odd heat flash for a few seconds, right around just before I leave home..it's almost as if my body is trying to adjust with me wearing warm layers just before stepping out into the winter cold outdoors.