I think any time that you are unfortunate enough to wake up with an injury or soreness you didn’t have when you went to sleep, your brain should at least reward you with some kind of dreamlike memory of having done something awesome while you were snoozing.
Wake up with a crick in your neck? — “Aw, yeah. I was fighting dragons in my sleep!”
Hip sore? — “I ran a thousand miles!”
That would be so much better than, “Yeah, I fell asleep and hurt myself.”