Working with horses: an OWAS work task analysis

Most work in horse stables is performed manually in much the same way as a century ago. It is the least mechanized sector dealing with large animals. People working with horses are exposed to several types of risk for developing musculoskeletal problems, but the work tasks and workload have not been investigated in detail. The aim of this study was to estimate the postural load of the work tasks performed around horses to find those that were harmful and required measures to be taken to reduce physical strain. Altogether, 20 subjects (stable attendants and riding instructors) were video recorded while carrying out their work in the stable, and preparing and conducting riding lessons. The work was analyzed with the Ovako Working posture Analysis System (OWAS) to determine the postural load and to categorize the potential harmfulness of the work postures. Three work tasks involved about 50% of the work positions in the three OWAS categories (AC2 to AC4) where measures for improvement are needed: "mucking out" (50%), "bedding preparation" (48%), and "sweeping" (48%). These work tasks involved over 60% work postures where the back was bent, twisted, or both bent and twisted. Therefore, it is important to find preventive measures to reduce the workload, which could include improved tools, equipment, and work technique.