Exactly this haha. Even a relatively mild workout keeps my body warm for hours. For cycling in the winter (which feels especially cold after a warm bed) I used

Exactly this haha. Even a relatively mild workout keeps my body warm for hours. For cycling in the winter (which feels especially cold after a warm bed) I used to take cold showers before going outside. I can really recommend this, as the outside temperature feels way more pleasant this way. Instead of shivering the whole trip, I actually enjoyed going outside. Besides, it mentally wakes you up like nothing else. Edit: and indeed, don't forget the winter socks! I prefer them in wool. Also a baggy fleece sweater/vest made of polar fleece (which I can't find anywhere anymore) with the thickest and highest collar possible.