AI Article Synopsis
- The study investigates knee-joint loading differences during single-leg hops between individuals who have undergone anterior cruciate ligament reconstruction (ACLR) and uninjured controls, focusing on patellofemoral-joint forces.
- The ACLR group displayed significantly lower peak knee flexion angles, internal knee extension moments, and patellofemoral-joint compressive forces compared to uninjured participants.
- These findings suggest that altered biomechanics post-ACLR may contribute to the risk and progression of knee osteoarthritis, emphasizing the need for further research in this area.
Article Abstract
Altered biomechanics are frequently observed following anterior cruciate ligament reconstruction (ACLR). Yet, little is known about knee-joint loading, particularly in the patellofemoral-joint, despite patellofemoral-joint osteoarthritis commonly occurring post-ACLR. This study compared knee-joint reaction forces and impulses during the landing phase of a single-leg forward hop in the reconstructed knee of people 12-24 months post-ACLR and uninjured controls. Experimental marker data and ground forces for 66 participants with ACLR (28 ± 6 years, 78 ± 15 kg) and 33 uninjured controls (26 ± 5 years, 70 ± 12 kg) were input into scaled-generic musculoskeletal models to calculate joint angles, joint moments, muscle forces, and the knee-joint reaction forces and impulses. The ACLR group exhibited a lower peak knee flexion angle (mean difference: -6°; 95% confidence interval: [-10°, -2°]), internal knee extension moment (-3.63 [-5.29, -1.97] percentage of body weight × participant height (body weight [BW] × HT), external knee adduction moment (-1.36 [-2.16, -0.56]% BW × HT) and quadriceps force (-2.02 [-2.95, -1.09] BW). The ACLR group also exhibited a lower peak patellofemoral-joint compressive force (-2.24 [-3.31, -1.18] BW), net tibiofemoral-joint compressive force (-0.74 [-1.20, 0.28] BW), and medial compartment force (-0.76 [-1.08, -0.44] BW). Finally, only the impulse of the patellofemoral-joint compressive force was lower in the ACLR group (-0.13 [-0.23, -0.03] body weight-seconds). Lower compressive forces are evident in the patellofemoral- and tibiofemoral-joints of ACLR knees compared to uninjured controls during a single-leg forward hop-landing task. Our findings may have implications for understanding the contributing factors for incidence and progression of knee osteoarthritis after ACLR surgery.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/jor.25053 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Patients with anterior cruciate ligament reconstruction frequently present asymmetries in the sagittal plane dynamics when performing single leg jumps but their assessment is inaccessible to health-care professionals as it requires a complex and expensive system. With the development of deep learning methods for human pose detection, kinematics can be quantified based on a video and this study aimed to investigate whether a relatively simple 2D multibody model could predict relevant dynamic biomarkers based on the kinematics using inverse dynamics. Six participants performed ten vertical and forward single leg hops while the kinematics and the ground reaction force "GRF" were captured using an optoelectronic system coupled with a force platform.
View Article and Find Full Text PDFEffect of fatigue on neuromuscular and biomechanical variables after anterior cruciate ligament reconstruction: a systematic review.
J Sports Med Phys Fitness
January 2025
Department of Health and Corrective Exercise, School of Physical Education and Sport Sciences, Shahrood University of Technology, Shahrood, Semnan, Iran.
Introduction: This systematic review is aimed to evaluate the outcomes of published studies on the topic of fatigue-induced neuromuscular and biomechanical changes after anterior cruciate ligament (ACL) reconstruction.
Evidence Acquisition: The identification of studies involved a search across three databases - PubMed, Scopus, and Sportdiscus - until July 2023. The key terms utilized were fatigue, anterior cruciate ligament, biomechanics, electromyography, and landing.
Reproducibility of dynamic balance and anterior tibiofibular gap measurements in men and women: A menstrual cycle-based longitudinal study.
J Orthop Sci
December 2024
Department of Sports Rehabilitation, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan. Electronic address:
Background: The reproducibility of dynamic balance is an essential component of athletic performance and injury prevention, although it is affected by sex differences. This study aimed to confirm the reproducibility of repeated dynamic balance measurements and ultrasonography assessments of the anterior tibiofibular gap that may contribute to changes in dynamic balance for each sex.
Methods: This was a longitudinal study involving 48 feet, with 12 men and 12 women.
Hip and knee muscles co-activation ratio during hip-focused exercises: a multichannel surface electromyography study.
Res Sports Med
December 2024
Department of Biomechanics and Sport Injuries, Kharazmi University, Tehran, Iran.
This study aimed to evaluate the muscle activation ratio of hip and knee during hip-focused exercises. Eleven active university students performed 13 hip-focused exercises frequently used in the treatment of knee disorders. The average sEMG amplitude of tensor fasciae latae (TFL), gluteus medius (GMed), gluteus maximus (GMax), adductor longus (AL), vastus medialis (VM), vastus lateralis (VL), and GMed/AL, GMax/AL, and VL/VM ratios were determined.
View Article and Find Full Text PDFInfluence of Hamstring Injuries and Vision on Posterior Chain Muscle Activation during Challenging Single-Limb Balance Control among Athletes with Hamstring Strain Injuries.
J Musculoskelet Neuronal Interact
December 2024
Department of Physical Therapy, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Article Synopsis
- - The study examined how hamstring strain injuries (HSI) and vision affect muscle recruitment and balance in athletes, comparing 14 athletes with HSI to 14 healthy athletes while they performed balance tasks.
- - Results showed that athletes with HSI had significantly lower activation in their hamstring muscles during balance tasks, leading to increased body sway and reduced stability compared to healthy controls.
- - The findings suggest that the ongoing muscle activation deficits in athletes with HSI could negatively influence their balance, highlighting the need for targeted balance training in rehabilitation programs.
Want 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!