Keep in mind, everything isn't always as it seems. Before (and for awhile after) I had my Achilles repaired, stairs and I weren't on good terms even though I could walk relatively normal. I had a few people give me looks at work when I would take the elevator one floor Also, I have pretty bad arthritis in one knee since my cartilage is mostly gone. Some days it really bothers me a lot and I take the elevator, even for one floor. If people don't like it, fuck them.