Kheradmand, Bahar ,  Mohammadkhani, Arshia ,  Seyf, Sara ,  khalili, Mahsa , Rezae Afshar, babak. Evaluation of different methods of lifting heavy objects by means of  amplitude and frequency characteristics of electromyography signals. Journal of Physiology of Training and Sports Injuries (JPTSI). 2024;2(1):13-19. doi:https://doi.org/10.71702/eps.2024.1123252