Muscular Activities Measurements of Forward Lean and Upright Sitting Motorcycling Postures via Surface Electromyography (sEMG)Muhammad Izzat Nor Ma’arof, Abdul Rahman Omar, Rohani Haron, Hazran Husain and Muhammad Abdul WahabMATEC Web Conf., 135 (2017) 00046DOI: https://doi.org/10.1051/matecconf/201713500046