Not when piecing, but SITD gets me every time. I think it's the tension of it having to be so perfect. Plus the quilt is getting bulky by then. I was looking at those Posture Pleasers. I ended up putting 2 pounds of weight in a child's backpack. My back didn't get sore FMQ this time. I also need to keep my chair the right height so I'm not bending forward. That makes a huge difference.