Posted: 07/02/2016 at 00:34
Simply chunking up your body fat isn't the answer, simplistic as though it may first appear. I know. I've been living with the issue for all my adult life. There have been times when I've been a stone heavier or a stone lighter, and it's not made a sparrow fart's difference.
Between September and April there will be a time during every day when I lose all the circulation from the end 2 joints of my fingers. When it's bad, it can be worse. But here's the thing: I can warm up, and it's not usually painful. Not even pins & needles. As stated in the last paragraph above, avoidance is preferable. Moving to Egypt is an option. An extra layer is good, eg a Merino wool base layer. Having a warm bath before bed helps get an extra hour's sleep as you're not simply trying to get warm to start with.
When running, the trick is to start warm. Wear a beanie hat and gloves in winter, and pocket them after 2 or 3 miles. Layer appropriately, and take off layers as you feel the need. You can tie them around your waist.
One other thing. Ignore Vdot52. That forumite hides behind a blank image and is a mere troll of the worst kind.