ArticleJournal of athletic training2017
Quadriceps Function and Hamstrings Co-Activation After Anterior Cruciate Ligament Reconstruction.
Article in Journal of athletic training, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 4 of them syntheses that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
31 citing papers in PubMed, 4 syntheses or guidelines pooled it, 73 citations in OpenAlex.
- Changes in Quadriceps Force Control and Torque Quality Following Anterior Cruciate Ligament Injury and Reconstruction: Associations with Functional Performance-A Systematic Review and Meta-Analysis.Sports medicine - open · 2026Pooled it
- Hamstrings Neuromuscular Function After Anterior Cruciate Ligament Reconstruction: A Systematic Review and Meta-Analysis.Sports medicine (Auckland, N.Z.) · 2021Pooled it
- Neuromuscular Function of the Knee Joint Following Knee Injuries: Does It Ever Get Back to Normal? A Systematic Review with Meta-Analyses.Sports medicine (Auckland, N.Z.) · 2021Pooled it
- Pooled it
- Lower-Limb Joint Work Redistribution and Altered Movement Control During Double-Leg Squatting in Patients 6 Months After Anterior Cruciate Ligament Reconstruction.Bioengineering (Basel, Switzerland) · 2026Article
- Association of Preoperative Asymmetry in Vertical Ground-Reaction Force With Knee Extensor Symmetry 1 Year After Anterior Cruciate Ligament Reconstruction.Orthopaedic journal of sports medicine · 2026Article
- Computational biomechanics of human knee joint in maximum voluntary isometric extension with focus on the role of joint center positioning.Scientific reports · 2026Article
- Early Neuromuscular and Co-activation Patterns After Anterior Cruciate Ligament Reconstruction In Males: A Case-control Exploratory Feasibility Study.International journal of sports physical therapy · 2026Article
- Functional deficits after anterior cruciate ligament injury are associated with altered neuromuscular control: a cross-sectional study.Frontiers in medicine · 2026Article
- Integrating frequency and dynamic characteristics of EMG signals as a new inter-muscular coordination feature.Physical and engineering sciences in medicine · 2025Article
- Reliability of a Lower-Extremity Shear Force Control Task in Young, Uninjured Adults.Journal of applied biomechanics · 2025Article
- Clinical Features Post-Anterior Cruciate Ligament Reconstruction Associated With Structural Alterations in the Corticospinal Tract.Journal of athletic training · 2025Article
- Regional Patellar Tendon Strain in the Short- and Long-term After ACL Reconstruction Using Bone-Patellar Tendon-Bone Autograft.The American journal of sports medicine · 2025Article
- Analysis of Neuromuscular Control and Sensory and Psychological Anxiety Affecting Shock Absorption Capacity in Patients After Anterior Cruciate Ligament Reconstruction Surgery.International journal of sports physical therapy · 2025Article
- Hamstrings and Quadriceps Weaknesses Following Anterior Cruciate Ligament Reconstruction Persist Up to 6 Months After Return-to-Sport: An Angle-specific Strength Analysis.International journal of sports physical therapy · 2025Article
- Prediction of specific structural damage to the knee joint using qualitative isokinetic analysis.BMC musculoskeletal disorders · 2024Article
- Corticomuscular cross-recurrence analysis reveals between-limb differences in motor control among individuals with ACL reconstruction.Experimental brain research · 2024Article
- Bilateral neuromuscular control in patients one year after unilateral ACL rupture or reconstruction. A cross-sectional study.Heliyon · 2024Article
- Higher coactivations of lower limb muscles increase stability during walking on slippery ground in forward dynamics musculoskeletal simulation.Scientific reports · 2023Article
- Article
Corrections and comments
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Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
contextIndividuals with anterior cruciate ligament reconstruction (ACLR) have quadriceps dysfunction that contributes to physical disability and posttraumatic knee osteoarthritis. Quadriceps function in the ACLR limb is commonly evaluated relative to the contralateral uninjured limb. Bilateral quadriceps dysfunction is common in individuals with ACLR, potentially biasing these evaluations.
objectiveTo compare quadriceps function between individuals with ACLR and uninjured control participants.
designCross-sectional study.
settingResearch laboratory. PATIENTS OR OTHER
participantsTwenty individuals with unilateral ACLR (age = 21.1 ± 1.7 years, mass = 68.3 ± 14.9 kg, time since ACLR = 50.7 ± 21.3 months; females = 14; Tegner Score = 7.1 ± 0.3; 16 patellar tendon autografts, 3 hamstrings autografts, 1 allograft) matched to 20 control participants (age = 21.2 ± 1.2 years, mass = 67.9 ± 11.3 kg; females = 14; Tegner Score = 7.1 ± 0.4) on age, sex, body mass index, and Tegner Activity Scale. MAIN OUTCOME MEASURE(S): Maximal voluntary isometric knee extension was performed on an isokinetic dynamometer. Peak torque (PT), rate of torque development (RTD), electromyographic (EMG) amplitude, central activation ratio (CAR), and hamstrings EMG amplitude were assessed during maximal voluntary isometric knee extension and compared between groups using independent-samples t tests. Relationships between hamstrings co-activation and quadriceps function were assessed using Pearson correlations.
resultsParticipants with anterior cruciate ligament reconstruction displayed lesser quadriceps PT (1.86 ± 0.74 versus 2.56 ± 0.37 Nm/kg, P = .001), RTD (39.4 ± 18.7 versus 52.9 ± 16.4 Nm/s/kg, P = .03), EMG amplitude (0.25 ± 0.12 versus 0.37 ± 0.26 mV, P = .04), and CAR (83.3% ± 11.1% versus 93.7% ± 3.2%, P = .002) and greater hamstrings co-activation (27.2% ± 12.8% versus 14.3% ± 3.7%, P < .001) compared with control participants. Correlations were found between hamstrings co-activation and PT (r = -0.39, P = .007), RTD (r = -0.30, P = .03), and EMG amplitude (r = -0.30, P = .03).
conclusionsIndividuals with ACLR possessed deficits in PT, RTD, and CAR compared with control participants. Peak torque is the net result of all agonist and antagonist activity, and lesser PT in individuals with ACLR is partially attributable to greater hamstrings co-activation.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.