Electromechanical delay of the knee extensor muscles: comparison among young, middle-age and older individuals - Libardi, Cleiton A; Souza, Thiago M. F; Conceição, Miguel S; Bonganha, Valéria; Chacon-Mikahil, Mara Patricia T; Cavaglieri, Claudia R; Moraes, Antonio C. de; Ugrinowitsch, Carlos (Clinical physiology and functional imaging, 2015)