To Ride Or Not To Ride? Slippy Snow Commute?

Riding Schwalbe Snow tyres at even medium pace seems to be an effective training session. Heavy as fuck and huuuuuge rolling resistance = proper workout.

They were what I used for my 105 mile / nearly 8000ft climbing ride in December. Would've been fine* if my fucking seat collar hadn't been slowly failing and giving up nearly 2cm of saddle height over the course of 7 hours :/

*well, heavy and slow as fuck, but fine