ArticleThe American journal of sports medicine2011
Single-legged hop tests as predictors of self-reported knee function in nonoperatively treated individuals with anterior cruciate ligament injury.
Article in The American journal of sports medicine, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 76 papers, 2 of them syntheses that pooled it.
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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.
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Who cites it
76 citing papers in PubMed, 2 syntheses or guidelines pooled it, 167 citations in OpenAlex.
- Effects of Unilateral Conditioning Activity on Acute Performance Enhancement: A Systematic Review.Journal of sports science & medicine · 2022Pooled it
- Risk of Secondary Injury in Younger Athletes After Anterior Cruciate Ligament Reconstruction: A Systematic Review and Meta-analysis.The American journal of sports medicine · 2016Pooled it
- Trial
- Impact of treatment strategy and physical performance on future knee-related self-efficacy in individuals with ACL injury.BMC musculoskeletal disorders · 2018Trial
- Assessing the Recovery of Muscle Fatigue Using Shear Wave Elastography.Sports medicine - open · 2026Article
- Current concepts and future perspective of muscle function tests to inform return to sport decision-making after ACLR: A narrative review.Journal of experimental orthopaedics · 2026Review
- The incidence of arthrogenic muscle inhibition in acute knee injuries: a prospective cohort study in a tertiary acute knee unit.Asia-Pacific journal of sports medicine, arthroscopy, rehabilitation and technology · 2025Article
- Structural and Functional Asymmetries in Male Basketball Players: A Cross-Sectional Analysis of Body Composition, Bone Status, and Performance.Journal of functional morphology and kinesiology · 2025Article
- Return-To-Sport Assessments After Anterior Cruciate Ligament Injury: Which Jump-Landing Test Is Sensitive to an ACL-Injury History Under Fatigued or NonFatigued Conditions?European journal of sport science · 2025Article
- Acute effects of unilateral conditioning activity on unilateral and bilateral jumping performance and bilateral strength asymmetry.Scientific reports · 2025Article
- Lower-limb asymmetry in healthy male athletes.Journal of physical therapy science · 2025Article
- The characteristics of lower extremity muscle activity and static balance of Chinese elite trampoline athletes during net contact phase.Frontiers in physiology · 2025Article
- Ground Reaction Forces, Asymmetries and Performance of Change of Direction Tasks in Youth Elite Female Basketball Players.Sports (Basel, Switzerland) · 2024Article
- Article
- An observational study of lower limb muscle imbalance assessment and gait analysis of badminton players.Frontiers in bioengineering and biotechnology · 2024Article
- Reliability of Spatiotemporal Characteristics During Single-Legged Hop and Bilateral Drop Jump Tasks Using an Instrumented Pressure Walkway.International journal of sports physical therapy · 2024Article
- Relation of Jump and Change of Direction Inter-Limb Asymmetries with Fitness in Youth Male Soccer Players.Medicina (Kaunas, Lithuania) · 2023Article
- Female Collegiate Dancers' Physical Fitness across Their Four-Year Programs: A Prospective Analysis.Journal of functional morphology and kinesiology · 2023Article
- Cognitive Training Improves Joint Stiffness Regulation and Function in ACLR Patients Compared to Healthy Controls.Healthcare (Basel, Switzerland) · 2023Article
- Does a Lower Limb Balance Test after Anterior Cruciate Ligament Reconstruction Have a Significant Correlation with Postoperative Clinical Score, Stability, and Functional Performance Test?Clinics in orthopedic surgery · 2023Article
16 more citing papers are in PubMed but not listed here.
Corrections and comments
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Authors and funding
8 authors at 4 institutions in 2 countries.
Funding
Abstract
backgroundPrevious studies have found significant predictors for functional outcome after anterior cruciate ligament (ACL) reconstruction; however, studies examining predictors for functional outcome in nonoperatively treated individuals are lacking. HYPOTHESIS: Single-legged hop tests predict self-reported knee function (International Knee Documentation Committee [IKDC] 2000) in nonoperatively treated ACL-injured individuals 1 year after baseline testing. STUDY
designCohort study (prognosis); Level of evidence, 2.
methodsNinety-one nonoperatively treated patients with an ACL injury were tested using 4 single-legged hop tests on average 74 ± 30 days after injury in a prospective cohort study. Eighty-one patients (89%) completed the IKDC 2000 1 year later. Patients with an IKDC 2000 score equal to or higher than the age- and gender-specific 15th percentile score from previously published data on an uninjured population were classified as having self-reported function within normal ranges. Logistic regression analyses were performed to identify predictors of self-reported knee function. The area under the curve (AUC) from receiver operating characteristic curves was used as a measure of discriminative accuracy. Optimal limb symmetry index (LSI) cutoff for the best single-legged hop test was defined as the LSI with the highest product of sensitivity and specificity.
resultsSingle hop for distance symmetry indexes predicted self-reported knee function at the 1-year follow-up (P = .036). Combinations of any 2 hop tests (AUC = 0.64-0.71) did not give a higher discriminative accuracy than the single hop alone (AUC = 0.71). A cutoff of 88% (LSI) for the single hop revealed a sensitivity of 71.4% and a specificity of 71.7%.
conclusionThe single hop for distance (LSI) significantly predicted self-reported knee function after 1 year in nonoperatively treated ACL-injured patients. Combinations of 2 single-legged hop tests did not lead to higher discriminative accuracy than the single hop alone.
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