ArticleOrthopaedic journal of sports medicine2023
Effect of Quadriceps and Hamstring Strength Relative to Body Weight on Risk of a Second ACL Injury: A Cohort Study of 835 Patients Who Returned to Sport After ACL Reconstruction.
Article in Orthopaedic journal of sports medicine, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 3 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
15 citing papers in PubMed, 3 syntheses or guidelines pooled it, 33 citations in OpenAlex.
- Smaller hamstrings autograft size after primary ACL reconstruction is associated with higher odds for graft failure: A meta-analysis on autografts sizes covering 46,268 patients.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2026Pooled it
- Injuries in Artistic Gymnastics: Etiology, Prevention Strategies, and Multifactorial Perspectives-A Systematic Review.International journal of molecular sciences · 2025Pooled it
- Sport-Specific Injury Mechanisms and Situational Patterns of ACL Injuries: A Comprehensive Systematic Review.Sports medicine (Auckland, N.Z.) · 2025Pooled it
- Clinical and Donor-site Outcomes of Full-thickness Peroneus Longus Autograft in Arthroscopic Anterior Cruciate Ligament Reconstruction: A Prospective Indian Cohort Study.Journal of orthopaedic case reports · 2026Article
- Muscle performance but not biomechanics associate with second knee injury in a matched cohort of athletes who passed functional return-to-sport criteria after ACL reconstruction.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2026Article
- No differences at return to sport in psychological profiles and results of muscle function tests between females with and without a second ipsilateral or contralateral ACL injury after ACL reconstruction.BMC sports science, medicine & rehabilitation · 2026Article
- Age is not a primary risk factor for anterior cruciate ligament injury-A comprehensive review of anterior cruciate ligament injury and reinjury risk factors confounded by young patient age.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2026Review
- 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
- Persistent isokinetic knee flexion strength deficits at the time of return to sport are not associated with a second ACL injury.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025Article
- Differences in Strength, Muscle Work, and Hamstring/Quadriceps Ratio in Professional and Junior Elite Basketball Players According to Sex.Journal of functional morphology and kinesiology · 2025Article
- Comparison of Rehabilitation Characteristics Among High, Average, and Low Performers on Return-to-Sport Testing in Athletes After ACL Reconstruction.Orthopaedic journal of sports medicine · 2025Article
- Survival Analysis of ACL Graft and Contralateral ACL Ruptures in Patients Younger Than 18 Years.Orthopaedic journal of sports medicine · 2025Article
- Neurophysiology of ACL Injury.Orthopedic reviews · 2025Article
- Isokinetic Testing: Why it is More Important Today than Ever.International journal of sports physical therapy · 2024Article
- Changes in proprioception at different time points following anterior cruciate ligament injury or reconstruction.Journal of orthopaedic surgery and research · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: Anterior cruciate ligament (ACL) injuries are common sports-related injuries with a high risk of reinjury after return to sport (RTS). Rehabilitation aims to regain symmetrical knee strength and function to minimize the risk of a second ACL injury after RTS. Purpose: To determine the effect of absolute quadriceps and hamstring strength, normalized by body weight, on the risk of a second ACL injury during the first 2 years after RTS in patients who have undergone ACL reconstruction (ACLR). Study Design: Cohort study; Level of evidence, 3. Methods: Data from patients after index ACLR at the time of RTS were extracted from a rehabilitation registry-Project ACL. Patients who had performed isokinetic tests for quadriceps and hamstring strength and hop tests before RTS were included. The endpoint was a second ACL injury or a follow-up of 2 years after RTS after ACLR. Results: A total of 835 patients (46% women), with a mean age of 23.9 ± 7.7 years, were included. During the study period, 69 (8.3%) second ACL injuries (ipsilateral and contralateral) occurred. Greater relative quadriceps strength in the injured leg increased the risk of a second ACL injury (relative risk [RR], 1.69 [95% CI, 1.05-2.74]; Conclusion: Greater relative quadriceps strength in the injured leg at the time of RTS after ACLR was associated with an increased risk of a second ACL injury. There was no effect of relative quadriceps strength on the risk of a second ACL injury in patients who had recovered symmetrical quadriceps strength.
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Registered trials
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.