Finished drywall on a Saturday and my lower back locked

https://marcoljfw195.scriblorax.com/posts/toronto-physiotherapy-timeline-when-can-you-ditch-the-walker-after-knee-replacement

Wrapped drywall on a Saturday and my lower back locked, I put it off until week three when a massage during physio finally let me bend without stabbing pain, weird that it took that long.