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APPLYING ERGONOMIC APPROACH DECREASE BIOMECHANICAL FORCE AND WORKLOAD OF TRADITIONAL PORTERS IN BADUNG MARKET DENPASAR BALI

Author : Robert Hutagalung*

Abstract

Female Traditional porters work every evening at Badung market from 7 pm to 3.30 am. Age interval of the porters is 18-40 years. The weight of goods carried by a single porter is 60-100 kilograms plus 1-2 kilograms of the basket’s weight, carried on the head. The distance of each porting activity is 100 meters. From ergonomic concept, the burden is excessive and may cause injuries such as damage of intervertebral discs, pain, excessive fatigue and head and neck muscles disorder. The symptoms are more obviously seen in those over 40 years old for most of them are not ver y capable of working, even some of them need medical treatment. To overcome this non-ergonomic work condition, a work quality improvement was done to 11 sampled porters, including on work position, carrying weight and equipment design in order to improve the unnatural work position and to give chance to them to have an active rest as well as to alter the static work system to be more dynamic. Results of this study were: (1) average of pressure force on L5/S1 before improvement was 7,967.65 ± 66 .78 N and after improvement was 2,983.26 ± 16.63 N; (2 pulse rate average before improvement was 150.61 ± 1.06 pulses/minute and after improvement was 119.51 ± 1.39 pulses/minute. The results analysis showed that applying ergonomic approach could decrease the pressure force on L5/S1 of 60.94 % (p<0.05) and work load by 42.59 % (p<0.05). Key words: Ergonomic Approach, Biomechanical Force, Workload And Traditional Porters

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