Best Sitting Posture Is Not Straight  Up  "Researchers at Woodend Hospital in  Aberdeen, Scotland used a new form of magnetic resonance imaging to collect  images from 22 healthy volunteers, who assumed three different sitting  positions: slouching posture in which the body is hunched forward, an upright  90-degree sitting position, and a relaxed position where the subject reclined  backward 135 degrees. They concluded that the reclined position is the best, and  the forward slouch the worst." From the article: "'We were not created to sit  down for long hours, but somehow modern life requires the vast majority of the  global population to work in a seated position,' Dr. Bashir said. 'This made our  search for the optimal sitting position all the more  important.'