Figure 3From: Biomechanical comparison between single-bundle and double-bundle anterior cruciate ligament reconstruction with hamstring tendon under cyclic loading condition Schematic of how to determine the reference position (RP) and the anterior translation of the tibia (ATT). RP was defined as the position midway between the 2 zero points of the load–displacement hysteresis loop. ATT was defined as the displacement of the tibia from the RP with 100-N anterior tibial loads.Back to article page