Give me a break! How about "bending to tie shoes"? That takes it out of me these days. :)
6 floors to my office on the roof, taken briskly 2 at a time - out of breath by the time I get to the landing at the top and enough to break a sweat - good enough for me. On days I go back and forth a lot it adds up. Admittedly today I only went up the staircase once - and I felt so crappy I took the elevator the other times up.
Fair enough: it's your log!