CORRELATIONS BETWEEN HEART RATE, MUSCLE ACTIVITY AND ANGLE OF LUMBAR ASSOCIATED WITH POSTURE DURATIONS OF LAMINATORS IN MANUAL HAND LAYUP PROCESS
Author: Nur Syafiqah RAYME, Seri Rahayu KAMAT, Syamimi SHAMSUDDIN
Abstract:Laminators are people who worked with layup process in the making of composite products. In hand layup process especially manual handling, the laminators were prone to be in high risk of getting musculoskeletal disorders (MSD). The ergonomic approach in manual handling was already established since 2005 however, no specific studies were done especially in this process. This paper is a continuation of the research done by the authors which focused more on the data analysis of experimental data collection. The study aims to investigate the correlation between heart rate, muscle activity, the angle of lumbar during layup and the duration of the working posture. From observations and survey done in the previous study, the laminators were exposed to awkward posture as they tended enormous size of the mould. Hence, the study collected 4 parameters data simultaneously. The analysis of the correlation was done using MINITAB software using Response Surface Method (RSM) analysis in obtaining the p-value of the model. From the data analysis, only two of the models show insignificant of correlation and 6 out of 8 models show correlations in between parameters. It is concluded that there was a correlation in between muscle activity, heart rate, the angle of lumbar and duration of posture, however, further studies should be done to cater the insignificant of the other 2 models with different muscle type of Lumbar Support Spinae and Multifidus Lumbar.
Keywords: MSD, HAND LAYUP, ERGONOMICS