Sunday was a long day

Activity log for Sunday:

• 7:30 - 8:30 - clean kitchen, do dishes, take out green bin stuff, leave to get friend
• 8:30 - 12:30 - ate breakfast at home, began and completed bottling of two batches of beer with friend (~120 bottles worth) (bottling involves lots of bend, stopping, leaning, etc.); drove friend home
• 12:30 - 14:45 - ate reheated lasagna for lunch (delicious!), showered drove to grocery store and did full grocery run, spent time reading outside
• got home, took groceries in, helped put them away
• 14:45 - 16:30 - walked the dogs with a friend (longer walk than normal) for about an hour in total
• 16:30 - 22:00 - helped make and ate dinner, napped on couch for about an hour, sat on couch for a couple hours using laptop and generally being uncomfortable while my back gets worse and worse (this was really the first time today I was off my feet for a significant amount of time)

I feel like I did enough today that a workout is not necessary. So after all this activity I should be surprised my back is sore? I have to remember that while working out makes me feel good most of the time, I still have various problems that can't be fixed with it and those problems are still going to xxx my back up whenever they feel like it. Exercise is really important but it isn't a cure. I think I'll keep at it, though.