Great article from spinehealth.com on safe snow shovelling. It goes down further on the page then it appears at first, so scroll down:
I found it helpful & learned some things, so I thought you all might. I also go out every few hours during snows, even during the night, to clean off the car & back it in & out a few times. It’s a pain but I can’t risk having to do a big shovel & get further hurt.