There’s an old saying that “winter thickens the blood.” It’s an old wives’ tale, though, as temperature doesn’t have much to do with the thickness of blood – at least in humans. Some hibernating animals do get thicker blood in the winter to help them prepare for the cold. It’s one winter survival strategy.
Me? I like to get my blood pumping in the winter for physical and mental health. No hibernating here. Course, it helps to be 2,000 miles from home in the much milder climes of the Pacific Northwest.