Study on the Optimum Working Position in the Case of Wiping Dishes from the Viewpoints of Several Physiological Responses

Abstract

The present paper deals with the experimental study to find out the optimum working position of wiping dishes from the view points of physiological responses.
The following physiological responses were investigated ; measuring the change of pulse rate, the muscular activity coefficient in EMG and energy metabolisms.
The experimental subjects are five adult women and the experimental physical load is wiping a soup dish which is about 250 gramms in weight and has about 18 cm in diameter.
Twelve working positions were selected ; vertically three kinds of height (level of elbow, shoulder and eye), and horizontally four kinds of distance (10, 20, 30 and 40 cm forward the front body).
The most optimum position exists at the height of elbow level and in the distance of 20 cm from the body front and the working conditions become worse in receding in the distance both vertically and horizontally from that position.