I have just entered a charity stair climb in February - the Heron Tower in London. 888 steps, apparently. My office is a five storey building and though I can charge up and down the steps in my lunch hour, that is not quite going to do the trick, I feel.
Not a member of a gym so I can't use any stair machines there. I do cycle to work and run reasonably regularly so I am fairly fit.
Any suggestions?