Support was offered from clinical, laboratory and epidemiological studies that cumulative trauma disorders may be caused, aggravated, or precipitated by forceful, repetitive, or sustained static activities, particularly in combination with awkward postures occurring over time with insufficient recovery time. Several prospective studies have been recently reported which were cited as supporting this thesis. Possible limitations of these studies were briefly described. Of the 20 facilities visited, initial walk through surveys revealed that seven of these facilities did not have enough active workers in jobs in each of the four exposure categories. Subject selection included being an active worker who worked currently and for at least 1 year before the study, on a job that met one of four categories of hand force and repetitiveness. Because only active workers who had been on one of the study jobs for at least one year before the study were included the prevalence of cumulative trauma disorders were probably underestimated. The results did not note a strong association between the measures of hand force and repetitiveness and disorders of the neck, shoulder, or elbow/forearm. Since upper extremity postures were not considered in the exposure categorization, it was possible that someone in a low force low repetitive job may have been exposed to other potential work related risk factors such as extreme postures or localized mechanical stress against soft tissues.