Effect of external load at varying hand positions on perceived discomfort.

The purpose of this study was to assess the effect of external load at varying hand positions on discomfort, and to provide a new classification of external load. An experiment was carried out in which 16 postures with an external load of 0, 1.5, 3 kg were tested.

Ergonomic evaluation of three types of inner-room floor mats by using in-shoe and platform type pressure measurement systems.

Prolonged work in upright postures (standing and walking) is common in industry and in daily living activities, and is one possible risk factor for low back pain and leg problems. This study compared the reaction forces of four different floor surface conditions (three inner-room floor mats and no-mat) during gait. The reaction forces were measured by both the in-shoe and platform type pressure measurement systems.