Excellent question. Personally, I don't count errands or commute miles towards my fitness goals. They are normalized as part of my baseline. Presently I can alternate my M/W/F commute days with Tu/Th/Sat weight lifting and calisthenics workouts but during the winter I have to commute on weight training days and do. I do 10 sets of ab work every weekday so I am doing those even on commute days. I figure that a pure bodybuilder training hard for competition or maximum mass might not want to follow such a regimen but us ordinary folk can, and must, have a more pragmatic approach. Train as hard as you can, complete your commutes with reasonable dispatch and let the chips fall where they may. FWIW.

H