Having stuck fairly hard to the five minutes per month rule while she was growing up, Penny now seems to be able to take as much or as little exercise as I care to give her
Regularly, we have two offlead walks a day, around 40 minutes as a rule, but often the afternoon walk is longer. I try to give her a couple of on-lead walks per week as well, and if we go somewhere new, she's on the long lead as a matter of course because there are too many places to get lost round here and while her recall is good, she's impetuous where birds are concerned and can take off any time (my nerves can't take it these days!).
When we were on holiday in Arran, she walked 12 miles without turning a hair, in fact she was ready to go out again a couple of hours later!