I’ve been walking, despite the weather (and the sometimes abominable condition of streets & sidewalks): about three miles a day, according to my pedometer.
The limiting factor in how far I walk isn’t anything I would have guessed, back in the days when walking two blocks would leave me winded. I stop walking – and head for the nearest bus stop – mostly because I get bored. Not tired.
(Well, yes, and also because my feet hurt; but that’s because my sneakers are wearing out. Perhaps next month I will replace them.)