perspiration vs. insulation

i've come to the conclusion that there is an important matter that has seemingly slipped my mind through all of this weightlifting, running, spinning, and just general exercise. apparently, all of the endorphins and adrenaline (not to mention the confidence boost that i get from a little treadmill time) have clouded my mind. all of this calorie-burning activity has done wonders for my body in terms of leaning me out and all, but what i didn't expect was to be so damn cold all of the time. all of my insulation is fading away, and this little 'skin suit' i am left with isn't very warm it seems. on a blisteringly cold, 9 degree day like today, i kind of wish i had a roll or two to keep me warm :)