If you’re any good at it, it’s prob phenomenal conditioning-wise. (ie. no coincidence that every pro skater you’ve ever seen on TV is skinny/lean)
I bet everyone dismissing the OP’s question also thinks snowboarding is just a superchill, relaxing way to spend a day as well…
I would think skating is a decent cardio workout with fun added in. If you’re booking it on a skateboard, you’re gonna be breathing pretty heavily.
I would say the same with snowboarding as well. I’m an avid snowboarder and I’ll be damned if someone tells me it isn’t good for cardiovascular and strength conditioning.