Intra-discal pressure (IDP) is the amount of pressure that is placed on your vertebral discs in various positions. Bulging and herniated discs are a massive problem for Australians and one of the main reasons people seek chiropractic help. It's important to recognise when you spine is at risk for injury as these are positions most of us find ourselves everyday. The obvious ones are bending with a straight back to lift something, but check out how much pressure builds when sitting. You might want to get up and stretch RIGHT NOW if you have been sitting for some time. Also, if you are already suffering from back pain or disc pain, notice that lying flat on your back is the best position to alleviate pressure.