Purpose: Impairments in quadriceps force control and altered quadriceps and hamstring muscle activation strategies have been observed following anterior cruciate ligament reconstruction; however, the functional implications of these impairments are unclear. This study examined the cross-sectional associations between quadriceps force control, quadriceps activation, hamstring coactivation and clinically assessed knee function following anterior cruciate ligament reconstruction with a hamstring graft.
Methods: Sixty-six patients (18 ± 3 months following surgery) and 41 uninjured individuals participated. Quadriceps force control was assessed using an isometric knee extension task. Participants cyclically increased and decreased quadriceps force at slow speeds between 5 and 30 % maximum voluntary isometric contraction matching a moving target displayed on a screen. Quadriceps activation and hamstring coactivation were assessed concurrently using surface electromyography. Knee function was assessed with the Cincinnati Knee Rating Scale and three single-leg hop tests.
Results: The reconstructed group completed the task with 48 % greater root-mean-square error (RMSE), indicating significantly worse quadriceps force control (p < 0.001). In a multivariable model adjusted for sex, greater RMSE and greater lateral hamstring coactivation were significantly associated with worse knee function that is greater odds of scoring <85 % on one or more knee functional assessment.
Conclusions: Less-accurate quadriceps force output and greater hamstring coactivation are associated with worse knee joint function following anterior cruciate ligament reconstruction and may contribute to irregular knee joint loading and the onset or progression of knee osteoarthritis. Impairments in quadriceps force control and altered muscle activation strategies may be modifiable through neuromuscular training, and this is an area for future research.
Level Of Evidence: Case-control study, Level III.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s00167-015-3937-5 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Dynamic Changes in Muscle Thickness and Infrapatellar Fat Pad During Quadriceps Setting: An Ultrasound Echo Analysis.
Cureus
December 2024
Department of Health Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, JPN.
Purpose The infrapatellar fat pad (IFP) has the lowest pain threshold among all knee joint components and causes anterior knee pain after knee arthroplasty. It has been reported that selective muscle atrophy of the vastus medialis (VM) and fibrosis of the IFP may develop following knee joint surgery. Ultrasound enables visualization of IFP deformation (A1) from within the joint to the proximal area in response to muscle contraction, and this may be helpful in developing preventive and therapeutic strategies for IFP fibrosis.
View Article and Find Full Text PDFPatients With a Quadriceps Tendon Autograft Demonstrate Greater Asymmetry in Landing Kinetics Than Patients With a Bone-Patellar Tendon-Bone Autograft 6 Months After Anterior Cruciate Ligament Reconstruction.
Am J Sports Med
January 2025
Inova Sports Medicine, Fairfax, Virginia, USA.
Background: Asymmetric landing kinetics 6 months after anterior cruciate ligament reconstruction (ACLR) are associated with higher risk of second anterior cruciate ligament injury. Little is known about landing kinetics after ACLR with an all-soft tissue quadriceps tendon (QT) autograft despite its increasingly common use in young, active patients.
Purpose/hypothesis: The purpose of this study was to compare landing kinetics during a bilateral drop vertical jump (DVJ) 6 months after ACLR in participants who had undergone primary ACLR with a QT or bone-patellar tendon-bone (BTB) autograft.
Neuromuscular factors predicting lower limb explosive strength in male college sprinters.
Front Physiol
January 2025
Sports Science School, Beijing Sport University, Beijing, China.
Purpose: This study aimed to explore the effects of neural and muscular factors on lower limb explosive strength in male college sprinters, and build models based on those factors to identify the key neuromuscular factors that predict the rate of force development (RFD) and 30 m sprint time.
Method: 15 male college sprinters were recruited in this study, with 100 m personal best times under 10.93 s.
Association between health-related quality of life and perioperative exercise capacity in older postoperative patients with non-small cell lung cancer.
J Thorac Dis
December 2024
Department of Physical Therapy Science, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
Background: Lung cancer represents a significant global health concern and constitutes the primary cause of cancer-related mortality. Complete surgical resection with curative intent remains the most efficacious treatment modality for improving the survival rate of patients with localized lung cancer. Average life expectancy has increased in many countries, and the number of older patients undergoing surgery has increased.
View Article and Find Full Text PDFChanges in Muscle Quality Following Short-Term Resistance Training in Older Adults: A Comparison of Echo Intensity and Texture Analysis.
Ultrasound Med Biol
January 2025
Institute of Exercise Physiology and Rehabilitation Science, University of Central Florida, Orlando, FL, USA. Electronic address:
Background: Skeletal muscle echo intensity (EI) is associated with functional outcomes in older adults, but resistance training interventions have shown mixed results. Texture analysis has been proposed as a novel approach for assessing muscle quality, as it captures spatial relationships between pixels. It is unclear whether texture analysis is able to track changes following resistance training.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!