Here at Capitol Spine & Rehabilitation, we rely on the researcher Nachemson’s documentation of the amount of pressure on your spine when in various positions: standing, sitting, moving. For this discussion on sitting, see that sitting straight exerts 140 pounds of pressure on the spine. Sitting slouched forward exerts 185 pounds of pressure. Sitting slouched forward holding weight (like a purse or baby) increases the pressures to as high as 275 pounds. Getting up to stretch drops pressure to 100mm in the standing position, so get up periodically to drop the pressure!