Study of a Workseat Designed to Preserve Lumbar Lordosis

Abstract

The purpose of this study was to evaluate the effect a saddle shaped seat has on the lumbar curve of workers. A saddle shaped work seat was designed and constructed. Subjects were asked to sit at a work task. Measurements were taken of their lumbar curve whilst seated on the saddle work seat and, alternatively on a conventional work seat. Photographs were used to provide a reference for measurements which were compared for the two seats. The lumbar lordosis of all subjects was found to be greater when seated on the saddle seat. The researchers concluded that the saddle seat was a viable alternative to the current range of ergonomic chairs as it has none of their inherent problems, but effectively places the user into an ergonomically correct position. Whilst further tests will be necessary to confirm these findings, it does seem that the saddle seat is a useful work seat which preserves good lumbar lordosis while allowing free upper body movement to work with accuracy, power and good vision. It therefore reduces the risk of back injury at work in accordance with the intent of the New South Wales Occupational Health and Safety Act 1983.