About once a year or so, I throw my back out. It’s usually by doing something really dumb one day that is obviously a strain on my back, and then doing something really innocent a day or two later that throws it all out of whack. Dumb things include: moving furniture up the stairs by myself. Innocent things include: sneezing.
this time, It’s a bit complicated. I’ve been exercising more then ever in my adult life, but I’ve definitely not been stretching, and i strained my back when I went to pass someone on my bike and torqued suddenly. Yeesh! Hot pads and magic bags for me!