Ask for endurance

Hello,

       If I would like to ask someone how strong/endurant he is, can I ask "how many floors can you climb the stairs without stopping"? Thank you very much.

It would be better to say "how many flights of stairs can you climb without stopping?"

That is definitely a good endurance test! (I just climbed 8.) 

Dear Amy,

      Thank you very much for your answer. I think to climb the stairs is the way to exercise (without paying for gym) and it also helps conserve energy (elevators will be used less).

I agree!