Every once in a while, I have trouble with my back. It's not the small of my back but above my waist, near the kidneys. I am sore and tight there now, probably from sitting at the computer too long yesterday. It wasn't just the writing but reading blogs. Each interesting connection leads to another and pretty soon, I have spent 5 hours doing repetitious stuff. Lynn has her computer set to interrupt her every few minutes so she looks elsewhere and gets a little break. I need to do the same. We have had good experience with Break Reminder. It can be a bother if you forget to turn it off when starting a long download but having a sore back is a worse pain.
