Electromyographic amplitude ratio of serratus anterior and upper trapezius muscles during modified push-ups and bench press exercises - Martins, Jaqueline; Tucci, Helga T.; Andrade, Rodrigo; Araújo, Rodrigo C.; Bevilaqua-Grossi, Débora; Oliveira, Anamaria Siriani de (Journal of Strength and Conditioning Research, 2008)