Electromyograms (EMG normalized to M-waves; EMG/M, %) recorded from vastus lateralis (VL) and vastus medialis (VM) during the contractions performed at 80% and 40% maximal voluntary torque.

<p>** increased from the start of the protocol (p<0.01). Data are mean ± SD.</p><p>A main effect of protocol was observed for VL and VM (p<0.05).