ArticleOrthopaedic journal of sports medicine2021
Patellar Tendon Orientation and Strain Are Predictors of ACL Strain In Vivo During a Single-Leg Jump.
Article in Orthopaedic journal of sports medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed.
- Optimizing landing mechanics to modulate patellar tendon loading: An individualized moment arm analysis.iScience · 2026Article
- Clearance Criteria for Determining Eligibility for Force Plate Testing After Anterior Cruciate Ligament Reconstruction: A Scoping Review.Medicina (Kaunas, Lithuania) · 2026Article
- Rehabilitation guidelines after autograft anterior cruciate ligament reconstruction need more graft-specific exercise recommendations-A scoping review.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2026Article
- Exploring Lower Limb Biomechanical Differences in Competitive Aerobics Athletes of Different Ability Levels During Rotational Jump Landings.Bioengineering (Basel, Switzerland) · 2025Article
- Does Tibial Plateau Slope and Depth Influence ACL Strain In Vivo?Orthopaedic journal of sports medicine · 2024Article
- A comparison of three methods for establishing an ACL reference length in vivo.Journal of biomechanics · 2024Article
- Gender differences in the impact of anatomical factors on non-contact anterior cruciate ligament injuries: a magnetic resonance study.BMC musculoskeletal disorders · 2024Article
- Patellar tendon angle is not elevated in ACL-injured subjects, suggesting methods to correct should focus on prehabilitation and rehabilitation rather than surgery.Journal of experimental orthopaedics · 2024Article
- Correlation of Lower Limb Muscle Activity with Knee Joint Kinematics and Kinetics during Badminton Landing Tasks.International journal of environmental research and public health · 2022Article
- Use of a Novel Multimodal Imaging Technique to Model In Vivo Quadriceps Force and ACL Strain During Dynamic Activity.The American journal of sports medicine · 2022Article
- Design and validation of a semi-automatic bone segmentation algorithm from MRI to improve research efficiency.Scientific reports · 2022Article
Corrections and comments
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Authors and funding
5 authors.
Funding
Abstract
backgroundThere is little in vivo data that describe the relationships between patellar tendon orientation, patellar tendon strain, and anterior cruciate ligament (ACL) strain during dynamic activities. Quantifying how the quadriceps load the ACL via the patellar tendon is important for understanding ACL injury mechanisms. HYPOTHESIS: We hypothesized that flexion angle, patellar tendon orientation, and patellar tendon strain influence ACL strain during a single-leg jump. Specifically, we hypothesized that patellar tendon and ACL strains would increase concurrently when the knee is positioned near extension during the jump. STUDY
designDescriptive laboratory study.
methodsModels of the femur, tibia, ACL, patellar tendon, and quadriceps tendon attachment sites of 8 male participants were generated from magnetic resonance imaging (MRI). High-speed biplanar radiographs during a single-leg jump were obtained. The bone models were registered to the radiographs, thereby reproducing the in vivo positions of the bones, ligament, and tendon attachment sites. Flexion angle, patellar tendon orientation, patellar tendon strain, and ACL strain were measured from the registered models. ACL and patellar tendon strains were approximated by normalizing their length at each knee position to their length at the time of MRI. Two separate bivariate linear regression models were used to assess relationships between flexion angle and patellar tendon orientation and between ACL strain and patellar tendon strain. A multivariate linear regression model was used to assess whether flexion angle and patellar tendon strain were significant predictors of ACL strain during the inflight and landing portions of the jump.
resultsBoth flexion angle and patellar tendon strain were significant predictors (
conclusionConcurrent increases in patellar tendon and ACL strains indicate that the quadriceps load the ACL via the patellar tendon when the knee is positioned near extension. CLINICAL RELEVANCE: Increased ACL strain when the knee is positioned near extension before landing may be due to quadriceps contraction. Thus, landing with unanticipated timing on an extended knee may increase vulnerability to ACL injury as a taut ligament is more likely to fail.
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