Biomechanical ergonomic evaluation of handwriting performance in left-handed students when using writing armchair

Since ninety percent of the human population in the world are right-handed, many products and facilities are designed for right-handed people. In Indonesia, writing armchair with desktop fixed at the right side is a common product used at tertiary education level, which is uncomfortable for left-handed students because they have to tilt their bodies awkwardly to the right side. Inadequate facilities of left-sided writing armchair in educational institutions are caused by the unknown difference impact on the handwriting performance of left-handed students when using both types of writing armchairs. The purpose of this research is to find out the handwriting performance differences of left-handed students based on biomechanical ergonomic factors. Thirty left-handed university students, aged 18-23 years, participated in this research to conduct 30-minute handwriting experiments using left-sided and right-sided writing armchair. Four measurements parameter used were electromyography (to measure muscle activit...