A weak back? When did you get it?

"Oh, about a week back."

Sorry for the old Vaudeville joke. My dad was a Vaudeville performer, and he had them in spades. To wit:

Patient: "Doc, it hurts when I raise my arm (or move my leg forward) like this."
Doctor: "Then don't do that."
Patient: "Doc, I have this pain in my hip."
Doctor: "Did you ever have this before?"
Patient: "Yes."
Doctor: "Well, you've got it again."

The good news is that my back/hip pain has improved. I have been stretching my lower back and strengthening my core. That, and taking a couple of days off, I believe, have helped.