Seventeen of the top Canadian occupations typically have workers sitting a significant proportion of their work day. An average of 30% of Ontario WSIB lost time claims since 1996 involve low back injury. The return to work objective for twenty percent of these patients requires prolonged sitting in their work stations. While a number of these studies have claimed a relationship between sitting and LBP, the relationship is complex. Back pain and chair use are the second most important health factors for the aging workforce. The odds ratio for LBP is estimated for seated tasks at 1.9721. Prolonged and monotonous, low-level mechanical loads associated with a seated posture are thought to provoke pain.