I used to run in -20C every day, its doable. Its never going to be as easy as non-freezing temps unfortunately. Personally, for -30 to -10C I wore running shoe

I used to run in -20C every day, its doable. Its never going to be as easy as non-freezing temps unfortunately. Personally, for -30 to -10C I wore running shoes with spikes that slip over the shoe to stop slipping. For body warmth I wore thermal underwear underneath some running shorts and then two long shirt layers (wool or something insulating) and a thin/thick jacket depending on how fast I was going to run (slower = bigger jacket). I protected my face/neck with a buff and a warm hat. For hands I wore mits, not gloves (keeping fingers together for warmth). Another trick I used is to do pushups before going out to pre-warm yourself and to ensure that you don't have too many layers. After all that, its important to fall into the right running pace where you are not too hot or too cold.