I asked a question about saddle chairs..this is the thread.
Has anyone here tried a saddle chair?
It may or may not be your chair. Do you have your machine at a height that is making you stoop/bend to see your sewing area? That is the 1 thing that always makes my back hurt. Is your lighting good? If it's not, you may be sewing with your eyes very close to the sewing area just to see, which results in bending. You can google ergonomic sewing machine height and see how you should be set up. In general, I was taught to sit at a table and bend my arms..so that your hands are level with your elbow..your hands are now at the height that your sewing area should be..NOT your table top..the actual top of your quilt or fabric. There are many tips/tricks to raise your machine height, bed risers come to mind..I'm sure other posters will chime in with what they do. Good luck, welcome to the board and to quilting !