Lemos, E.A., Caldas, L.C., Leopoldo, A.P.L., Leopoldo, A.S., Ferreira, L.G. and Lunz, W. 2017. The perception of effort is not a valid tool for establishing the strength-training zone. Journal of Human Sport and Exercise. 12, 3 (Sep. 2017), 593–606. DOI:https://doi.org/10.14198/jhse.2017.123.04.