Muscle & Tendon

Document Type



We compared muscle architecture with concentric movement velocity (CMV) during resistance exercise (RE). Twenty-four RE active males (21.4 ± 1.8 yrs) completed a dominant leg, single-leg leg extension at 75 & 90% of 1-repetition maximum (1RM) to failure. Ultrasound measures of the vastus lateralis (VL) were taken to assess pennation angle (PA), muscle thickness (MT) & fascicle length (FL). MT & 1RM were moderately correlated (r=0.32). Further, PA & FL were significantly correlated with 75% 1RM peak (P) & average (Av) CMV, (r=0.41-0.75) & FL/MT was strongly correlated with 75% 1RM P & Av CMV (r=0.64-0.76). Additionally, multiple regression suggested PA & FL were significantly associated with CMV. The data suggest FL, PA & FL/MT are importantly related to CMV during moderate-to-heavy RE, to failure.