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(a) hip net joint torque (NJT) as a function of the hip flexion angle, (b) knee NJT as a function of the knee flexion angle, and (c) ankle NJT as a function of plantarflexion angle. The solid and dotted lines represent the conventional deadlift (CD) and the Romanian deadlift (RD), respectively. BC and BR represents the bottoms of the CD and the RD, respectively. The arrow in the knee NJT indicated the event when the GRF vector was posteriorly located to the knee joint.
