Unfortunately, today, they ache a lot.
I don't know why; I didn't work all that hard yesterday. Once the garage work was done I watered my wife's roses, washed a load of dishes, made dinner, emptied the dishwasher of clean dishes and put in another load of dirty (it had been a while since I ran the dishwasher). None of that was strenuous enough to leave me feeling like this.
I don't know what the hey is going on.
What I do know is that I'm going to sit for a little while longer and see if I feel any better. Maybe take some ibuprofen....