I think it depends on the job. Two examples . I had a job years ago where I went up and down ten steps at least 100 times a shift. I also lifted 40 pound cases of product - at least 100 of them per shift if I only did half the work and my teammate did the other half - which comes out to TWO TONS of lifting in a shift, not including the other things we actively did for 8 hours. SO, I'd say it counts for something. After that, I had a job where I walked several miles a day within the length of the plant - we didn't have pedometers in those days, but no doubt I put in at least four or five miles per day. I'd say that also counts for something. Evert step matters.