The office ergonomic intervention is a longitudinal pre-post quasi-experimental design, with three study groups: a control group, a group receiving an office ergonomic training program, and a group receiving both the ergonomic training and a highly-adjustable ergonomic chair. The chief health outcome measure for this study is an overall bodily pain score constructed from a self-administered “scorecard”. The study population is from the claims processing and customer service departments of a large (5,000 employees) medical services company. 251 participants had enrolled in the study. Post-intervention, the chair-with-training group had a lower level of pain throughout the day compared to either the training-only or the control groups. This effect was calculated using a separate ANOVA model for each day of the week, and significance or borderline significance was obtained in each run (p = 0.001, 0.015, 0.04, 0.001, 0.05 on Monday-Friday). There was no significant effect for the training-only group.