Being on the wrong side of 50 myself....albeit a tad younger.

I was thinking the same thing. So I broke out the bicycle and started biking 3 miles to work then back. Now that don't seem like much until you see the friggen hills I've got to climb to get to work!

Coming home is much much easier so I take a longer route coming home.
My boy and I were out setting up the bear bait and he was shocked at how well I carried in my bag of feed. Climbed the ridge like it was nothing.
HA