I'll also add modern witnesses count time standing by a trolley or, now, writing letters. Whereas the older generation's dedication to the house to house ministry, and the amount of walking that entailed, served as a balance for their otherwise sedentary lifestyle. Driven by Watchtower's aversion to exercise, I believe this walking was a preventative for the diseases I mentioned so prevalent among modern JWs.
Atlantis what do you think? I know you've seen many changes yourself....have you noticed that the old style witness was lithe and long lived, the more recent witness obese and depressed??