Background: most persons will experience acute low back pain during their lifetime. The first epi¬sode usually occurs between 20 and 40 years of age. Objectives: to investigate the effect of intermittent sitting on the lumbar range of motion of prolonged standing low back pain developers. Methods: 60 subjects participated in this study. They were randomly distributed into two equal groups; group I involved 30 subjects were stood for 15 min. and sit for 5 min. Group II involved 30 subjects where stand for 30min and sit 10 min throughout the workday for 8 hours. The study is a one-shot study. BROM (back range of motion device) was used to measure (flexion and extension of lumber ROM). Results: There was no substantial change in the stand-to-sit ratio of 3:1 which did not increase the LBP lumbar range of motion produced in response to prolonged standing. Conclusions: Extended status of standing in the workplace could result in LBP for workers and possible forms of minimizing sedentary time should be evaluated.
