ความเสี่ยงทางสุขภาพต่อการปวดไหล่และความล้าของกล้ามเนื้อไหล่จากการตรวจคลื่นไฟฟ้ากล้ามเนื้อในพนักงานผลิตและประกอบชิ้นส่วนอิเล็กทรอนิกส์
HEALTH RISK ON SHOULDER PAIN AND SHOULDER MUSCLE FATIGUE BY ELECTROMYOGRAPHY (EMG) IN ELECTRONIC INDUSTRIAL WORK
Keywords:
health risk matrix, electromyography (EMG), fatigue, shoulder pain, electronic workerAbstract
This cross-sectional descriptive study aimed to assess the health risks of shoulder pain and shoulder muscle fatigue by electromyography (EMG) measurement in electronic workers. Data were collected by using a structured interview questionnaire, Musculoskeletal disorders Severity and Frequency Questionnaire (MSFQ), Rapid Upper Limb Assessment, and health risk assessment matrix for shoulder pain and EMG measurement. Data were analyzed using descriptive statistics. The results of the study found that most workers had mild shoulder discomfort (34.5%). The ergonomic risk level of the upper limb found that most workers were at the moderate risk level (39.9%). The health risk level of shoulder pain found that workers were in the moderate to high risk (54.9%). The electromyography (EMG) on the shoulder fatigue throughout 8 working hours, there was the higher fatigue level (MF/Time slope) of the left shoulder (MF/Time slope = -1.250) compared to right shoulders (MF/Time slope = –0.998, respectively). When considering the shoulder muscle fatigue according to the 4 levels of health risk on the shoulder pain, it was found that the left shoulders muscle in the high and very high risk level showed higher fatigue (MF/time slope = -1.961 and = -1.449, respectively) than those of the right shoulders muscle with high risk and very risk levels (MF/time slope = -1.025 and = -1.092, respectively). According to this study of working postures in sitting and standing positions, it was found that workers had higher fatigue in their left shoulder and sitting posture than their right shoulder and standing posture. This is because of that workers move and work with their right side of upper limbs and shoulder more frequently than the left side. From the results of this study, the data can be used as a guideline for monitoring of shoulder pain by the health risk matrix and promoting the exercise among electronic workers with static working posture.
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