Came across and interesting little exercise for those of us who spend a lot of time sitting in front of either a sewing machine or a computer...goes like this....
Sit in your chair with your feet flat on the floor and your back supported by the chair. Put your hands above your head and grasp one hand with the other, now without leaving the chair reach for the ceiling, stretch as if you are going to touch it. Then with your arms still up let your hands separate and stretching up wiggle your fingers and open your hands as if you were trying to see how wide you can spread your fingers.
While your hands are up slowly turn your head first one way then the other very slowly as if you are trying to touch your chin to your shoulders. Lower your hands to your lap, lift your shoulders as if trying to touch them to your ears, roll them slowly back and down, then again forward and down. Then putting one hand at a time up curve it and stretch as if trying to touch the opposite shoulder with your fingers over your head. Do this once an hour and say goodbye to those back pains you get from too much sitting and not enough moving around...it doesn't hurt to get up and move around now and then either....