A growing body of literature has recently brought attention to the idea that prolonged sitting time is a deleterious and independent risk factor for chronic disease and all-cause mortality. The purpose of this dissertation was to assess the effects of sit-stand equipment and hourly prompting on occupational sitting time. The primary hypothesis of this study was that sit-stand office equipment would decrease occupational sitting time in call center employees compared to a control group. Secondarily, sit-stand office equipment would also increase the amount of time spent standing and stepping, as well as self-reported productivity and mood compared to a control group.