If I have 3 bags of trash to take down to the dumpster, I'll make three trips up and down the steps.
Whereas DH is also like me.. even worse: I might make the extra trips with trash, groceries, suitcases...but he'll load himself up to the point he can't see and is staggering.. to "do it in one trip".
Sarah, thanks for being more succinct than me!
Lthrnckpa.. still.. try to do something to focus on the joints though.. don't put it off. Even one appointment with a physical therapist could give you a set of exercises to do at the home or gym as part of the time you dedicate to exercise in general. Suffering after a few days of walking the dog sounds like something that needs to be addressed!
There are so many practices nowadays that specialize in "sports medicine" and so forth.. good luck to you!!