I sat down on something low to put on my tights this morning. I must have done it a bit too abruptly- when I landed, pain shot up and down my back and it locked up. I've pulled muscles in my back before but never something like this.
So instead of doing the group ride I was looking forward to, I am sitting on the couch icing my back and trying to relax while not breathing too deeply. Getting old sucks. I don't recommend it.