Paula Born Lopes, Luana Loss Cabral, Robert J Robertson, Andrea Holtz Franco, & Gleber Pereira. (2021). A Systematic Review of Validity and Reliability of Perceived Exertion Scales to Older Adults. Revista De Psicología Del Deporte (Journal of Sport Psychology), 29(4), 74–89. Retrieved from https://mail.rpd-online.com/index.php/rpd/article/view/230