Fig. 1From: The effect of cyclic knee motion on the elongation of four-strand hamstring autograft in anterior cruciate ligament reconstruction: an in-situ pilot studyGraft pretension procedure. The graft was tightened by a tensometer with the tension of 15 lb. Then the pretension was operated by repeated flexing and extending the knee joint between 0°(b) and 110° (a)Back to article page