| 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. |
|||||||||
Coach Krzyzewski Human Performance Laboratory, Duke University, Durham, North Carolina
* Address correspondence and reprint requests to Scott Colby, ME, Texas Scottish Rite Hospital, Movement Science Laboratory, 2222 Welborn Street, Dallas, TX 75219
The objective of this study was to qualitatively characterize quadriceps and hamstring muscle activation as well as to determine knee flexion angle during the eccentric motion of sidestep cutting, cross-cutting, stopping, and landing. Fifteen healthy collegiate and recreational athletes performed the four movements while knee angle and electromyographic activity (surface electrodes) of the vastus lateralis, vastus medialis obliquus, rectus femoris, biceps femoris, and medial hamstring (semimembranosus/semitendinosus) muscles were recorded. The results indicated that there is high-level quadriceps muscle activation beginning just before foot strike and peaking in mid-eccentric motion. In these maneuvers, the level of quadriceps muscle activation exceeded that seen in a maximum isometric contraction. Hamstring muscle activation was submaximal at and after foot strike. The maximum quadriceps muscle activation for all maneuvers was 161% maximum voluntary contraction, while minimum hamstring muscle activity was 14%. Foot strike occurred at an average of 22° of knee flexion for all maneuvers. This low level of hamstring muscle activity and low angle of knee flexion at foot strike and during eccentric contraction, coupled with forces generated by the quadriceps muscles at the knee, could produce significant anterior displacement of the tibia, which may play a role in anterior cruciate ligament injury.
This article has been cited by other articles:
|
|
 |
|
  D. G. Viskontas, B. M. Giuffre, N. Duggal, D. Graham, D. Parker, and M. Coolican Bone Bruises Associated With ACL Rupture: Correlation With Injury Mechanism Am. J. Sports Med., May 1, 2008; 36(5): 927 - 933. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. Kaila Influence of Modern Studded and Bladed Soccer Boots and Sidestep Cutting on Knee Loading During Match Play Conditions Am. J. Sports Med., September 1, 2007; 35(9): 1528 - 1536. [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]
|
|
|
|
 |
|
 K Button, R van Deursen, P Price, and D Rosenbaum Measurement of functional recovery in individuals with acute anterior cruciate ligament rupture * Commentary Br. J. Sports Med., November 1, 2005; 39(11): 866 - 871. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T Krosshaug, T E Andersen, O-E O Olsen, G Myklebust, and R Bahr Research approaches to describe the mechanisms of injuries in sport: limitations and possibilities Br. J. Sports Med., June 1, 2005; 39(6): 330 - 339. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. M. Chaudhari, B. K. Hearn, and T. P. Andriacchi Sport-Dependent Variations in Arm Position During Single-Limb Landing Influence Knee Loading: Implications for Anterior Cruciate Ligament Injury Am. J. Sports Med., June 1, 2005; 33(6): 824 - 830. [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]
|
|
|
|
|
|
G. DeMorat, P. Weinhold, T. Blackburn, S. Chudik, and W. Garrett Aggressive Quadriceps Loading Can Induce Noncontact Anterior Cruciate Ligament Injury Am. J. Sports Med., March 1, 2004; 32(2): 477 - 483. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. L. Zeller, J. L. McCrory, W. B. Kibler, and T. L. Uhl Differences in Kinematics and Electromyographic Activity Between Men and Women during the Single-Legged Squat Am. J. Sports Med., May 1, 2003; 31(3): 449 - 456. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | CONTACT US | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
