Effect of external load on isokinetic torque production by the knee in anterior cruciate ligament deficient patients.
The purpose of this study was to examine the effect of an external load on the isokinetic torque production of the knee directly from the anterior cruciate ligament (ACL) of deficient patients. Ten surgically proven ACL deficient patients were included in this study. Each patient was preoperatively studied using a Biodex isokinetic dynamometer. Isokinetic contraction of the quadriceps muscle and hamstring muscles were performed in five repetitions with an angular velocity of 45 degrees per second with proximal and distal pad placement, respectively. The results demonstrated that the ratio of torque production of the ACL deficient knee to the contralateral normal knee was greater in proximal pad placement than in distal placement and that the ratio of torque production of the knee in proximal pad placement to that of the knee in distal pad placement was greater in the ACL deficient knee than in the contralateral normal knee. Similar results were found for both extension and flexion of the knee. The results showed that ACL deficient patients felt more confident doing isokinetic contractions of the knee with proximal pad placement.
Department of Orthopedic Surgery, National Taiwan University, School of Medicine, Taipei, R.O.C.
C C
CC
Jiang
Y S
YS
Hang
D000328:Adult; D016118:Anterior Cruciate Ligament / Q000503:physiopathology* / Q000601:surgery*; D001696:Biomechanical Phenomena; D006801:Humans; D009119:Muscle Contraction