Figure 1. (A) Unpotentiated single twitch (Qtwunpot); (B) vastus lateralis (VL), (C) vastus medialis (VM), (D) rectus femoris (RF), (E) biceps femoris (BF) M-waves amplitudes recruitment curves, obtained with the anode placed over the gluteal fold (GF) and midway between the greater trochanter and the lower border of the iliac crest (Midtroc-iliac). ***: Significant difference at p < 0.001.