Quadriceps function and RMS of the SEMG during QMVC test (mean±SD).

QMVC: quadriceps maximal volitional contraction; QTf: quadriceps time to fatigue; VL: vastus lateralis; RF-M: rectus femoris; VM: vastus medialis; RMS: root mean squares; RF: rectus femoris; RMS: root mean squares; SEMG: surface electromyography;