The bicycle analogy is actually a very good one. Some mountaineers do jumping jacks, pushups, and other aerobic exercises right before entering a sleeping bag to raise their metabolism. Blankets aren't warm, but people are...especially those burning a lot of calories.
An electric blanket is the equivalent of a house with poor insulation running the heater constantly to remove the cold. A down comforter is the equivalent of added insulation. Increasing the number/thickness of blankets is essentially free while running an electric blanket is not. Am I missing something.
Maybe I need to spend some time up North...
- LostCause