In my first trip to Rome in 1979 (20 days, late September) we started walking from out hotel close to the Piazza del Popolo at around 8 am and we came back at arounf 7 pm for the aperitivo at a vineria on via Scrofa and then dinner. We repeated that a week later, visiting only places we hadn't seen the first time. The next time
sI walked that much in Rome was on two of my recent visits a few years ago when I had to deal with an ATAC strike
.