2 Sets of Skis 1 set of Poles?

I joined a small groups of guys for the weekly tuesday night ski at the camp. They usually head out around 7pm. I will not name any names to protect the innocent. But, someone forgot their poles. They were going to attempt to classic ski without poles. So I said they could have one of my poles and I would have the other. It wasn't as bad as it sounds but, after a hour I started getting a little tired. It was like normal skiing but, with more core and you had to really push with that arm. Did the Birches to Maples loop in 1:30. See ya outside.