| HOME | HELP | CONTACT US | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
Sign In to gain access to subscriptions and/or personal tools.
|
|
|
|||||||
Sign In to gain access to subscriptions and/or personal tools. |
|||||||||
McClure Musculoskeletal Research Center, Department of Orthopaedics and Rehabilitation, University of Vermont College of Medicine, Burlington, Vermont
McClure Musculoskeletal Research Center, Department of Orthopaedics and Rehabilitation, University of Vermont College of Medicine, Burlington, Vermont
McClure Musculoskeletal Research Center, Department of Orthopaedics and Rehabilitation, University of Vermont College of Medicine, Burlington, Vermont
McClure Musculoskeletal Research Center, Department of Orthopaedics and Rehabilitation, University of Vermont College of Medicine, Burlington, Vermont
McClure Musculoskeletal Research Center, Department of Orthopaedics and Rehabilitation, University of Vermont College of Medicine, Burlington, Vermont
McClure Musculoskeletal Research Center, Department of Orthopaedics and Rehabilitation, University of Vermont College of Medicine, Burlington, Vermont
The effects of weightbearing (closed kinetic chain) and nonweightbearing (open kinetic chain) exercises on the biomechanical behavior of an injured anterior cru ciate ligament or a healing anterior cruciate ligament graft are unknown. To understand the effects of these exercises on the healing graft, we measured the strain behavior of the normal anterior cruciate ligament in human subjects while they performed squatting, a closed kinetic chain exercise, and active flexion-exten sion of the leg, an open kinetic chain exercise. The maximum anterior cruciate ligament strain values ob tained during squatting did not differ from those ob tained during active flexion-extension. Also, anterior cruciate ligament strain values obtained during squat ting were unaffected by the application of elastic resis tance intended to increase muscle activity. These find ings indicate that squatting, which produces a substantial compressive joint force, does not necessar ily protect the anterior cruciate ligament more than active flexion-extension of the leg, which is character ized primarily by contraction of the dominant quadri ceps muscle. These findings also demonstrate that increasing resistance during the squat exercise does not produce a significant increase in anterior cruciate ligament strain values, unlike increased resistance dur ing active flexion-extension exercise.
This article has been cited by other articles:
|
|
 |
|
  S. Tagesson, B. Oberg, L. Good, and J. Kvist A Comprehensive Rehabilitation Program With Quadriceps Strengthening in Closed Versus Open Kinetic Chain Exercise in Patients With Anterior Cruciate Ligament Deficiency: A Randomized Clinical Trial Evaluating Dynamic Tibial Translation and Muscle Function Am. J. Sports Med., February 1, 2008; 36(2): 298 - 307. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. L. Zhang, Y. M. Lewicky, R. Oka, A. Mahar, and R. Pedowitz Biomechanical Analysis of Femoral Tunnel Pull-out Angles for Anterior Cruciate Ligament Reconstruction With Bioabsorbable and Metal Interference Screws Am. J. Sports Med., April 1, 2007; 35(4): 637 - 642. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
L. Y. Griffin, M. J. Albohm, E. A. Arendt, R. Bahr, B. D. Beynnon, M. DeMaio, R. W. Dick, L. Engebretsen, W. E. Garrett Jr, J. A. Hannafin, et al. Understanding and Preventing Noncontact Anterior Cruciate Ligament Injuries: A Review of the Hunt Valley II Meeting, January 2005 Am. J. Sports Med., September 1, 2006; 34(9): 1512 - 1532. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. D. Beynnon, B. S. Uh, R. J. Johnson, J. A. Abate, C. E. Nichols, B. C. Fleming, A. R. Poole, and H. Roos Rehabilitation After Anterior Cruciate Ligament Reconstruction: A Prospective, Randomized, Double-Blind Comparison of Programs Administered Over 2 Different Time Intervals Am. J. Sports Med., March 1, 2005; 33(3): 347 - 359. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. Li, L. E. DeFrate, H. Sun, and T. J. Gill In Vivo Elongation of the Anterior Cruciate Ligament and Posterior Cruciate Ligament During Knee Flexion Am. J. Sports Med., September 1, 2004; 32(6): 1415 - 1420. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. L. Markolf, G. O'Neill, S. R. Jackson, and D. R. McAllister Effects of Applied Quadriceps and Hamstrings Muscle Loads on Forces in the Anterior and Posterior Cruciate Ligaments Am. J. Sports Med., July 1, 2004; 32(5): 1144 - 1149. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
O.-E. Olsen, G. Myklebust, L. Engebretsen, and R. Bahr Injury Mechanisms for Anterior Cruciate Ligament Injuries in Team Handball: A Systematic Video Analysis Am. J. Sports Med., June 1, 2004; 32(4): 1002 - 1012. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. C. Fleming, G. Ohlen, P. A. Renstrom, G. D. Peura, B. D. Beynnon, and G. J. Badger The Effects of Compressive Load and Knee Joint Torque on Peak Anterior Cruciate Ligament Strains Am. J. Sports Med., September 1, 2003; 31(5): 701 - 707. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. M. Hooper, M. C. Morrissey, W. Drechsler, D. Morrissey, and J. King Open and Closed Kinetic Chain Exercises in the Early Period after Anterior Cruciate Ligament Reconstruction: Improvements in Level Walking, Stair Ascent, and Stair Descent Am. J. Sports Med., March 1, 2001; 29(2): 167 - 174. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. Kvist and J. Gillquist Sagittal Plane Knee Translation and Electromyographic Activity During Closed and Open Kinetic Chain Exercises in Anterior Cruciate Ligament-Deficient Patients and Control Subjects Am. J. Sports Med., January 1, 2001; 29(1): 72 - 82. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 S. Irwin, M. E Maitland, S. V Ajemian, and E. Suter Knee Instability. Physical Therapy, July 1, 1999; 79(7): 702 - 705. [Full Text]
|
|
| HOME | HELP | CONTACT US | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
