It’s believed that when sitting, the back should be straight. But recent studies show that this idea is wrong. For a long time, it’s been common knowledge that if a person has a bent back while sitting, the load on the spinal cord is harmful. But physiotherapists at the University Hospital of North Tees in Stockton-on-Tees carried out their own investigation and came to the conclusion that a slightly bent back can be good for those who have lower back pain.