I do not do a lot of FMQ, guess I need to get over my fear of it not being perfect the first time out, although I know that practice makes perfect. My pain is mostly in my upper arms and shoulders from my posture while I'm quilting/sewing. Someone recommended that I use the rubber door stops you can get almost anywhere and put them under the back of your sewing machine, so you're not leaning too far forward while sewing. Also, try using a phone book, or anything else that would bring your left foot to the same level as the right foot. My biggest problem is having my right leg go to sleep if I've quilted for too long, although it doesn't happen as much when I'm piecing. I try to take breaks after a certain amount of time and that seems to help. Please try some alternatives as recommended by QB members, and you will probably find the right equation for less pain and more quilting. Good luck.