The role of muscle function after anterior cruciate ligament rupture and treatment

Becker, Roland; Karlsson, Jón

doi:10.1007/s00167-018-4829-2

Cited by 3 publications

(3 citation statements)

References 22 publications

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“…The deficit in pre-training AL extensor torque shown in all tested modes and speeds may be attributed to two factors: 1) decline in gamma motor neuron activation, resulting in efferent Ia attenuation, leading to quadriceps weakness and dyskinesia, after ACL rupture 14 ; and 2) predominant quadriceps atrophy after ACL reconstruction 15 , which persists for years, with a 10 to 20% loss of strength, despite the efforts focused on rehabilitation 14,16 .…”

Section: Eccentric Isokinetic Trainingmentioning

confidence: 99%

Correlation Between Eccentric Training and Functional Tests in Subjects With Reconstructed Acl

Santos

Sousa

Medeiros

et al. 2018

Rev Bras Med Esporte

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Introduction: Eccentric training and jump tests are widely used to recover and measure deficits in knee strength and functionality after anterior cruciate ligament (ACL) reconstruction. Objective: To correlate knee extension and flexion torque generated by eccentric isokinetic training, with functional jump tests in subjects with reconstructed ACL. Method: Sixteen men with unilateral ACL reconstruction were assessed before and after 12 weeks of eccentric isokinetic training of knee flexors and extensors (3×10 MVC, 2x/week) at 30°/s for extension and flexion torque (isometric; concentric and eccentric at 30 and 120°/s) and functional jump tests (single, triple, cross and figure of 8). Inter- and intra-limb pre- and post-training mean peak torque (MPT), distance and jump test times were compared along with the correlations between these variables, considering P<0.05. Results: The affected limb (AL) showed significant gain of extension and flexion torque (P<0.01) in the different test categories and velocities evaluated. In the non-affected limb (NAL), this only occurred in the eccentric category (30 and 120°/s), in the extension (P<0.01) and flexion (P<0.05 and P<0.01) torques, respectively. In the jumps, there was an increase in distance (single and triple; P<0.05) and a decrease in time (crossed and figure of 8; P<0.01), however, MPT x Jump correlations were weak (r<0.3) in the pre and post-training period in both limbs. Conclusion: Despite the gain in knee extension and flexion torque and jumping performance, the expected correlation was not satisfactory, suggesting that knee functionality involves other variables inherent to motor control. Level of Evidence IV; Type of study: Case series.

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Section: Eccentric Isokinetic Trainingmentioning

confidence: 99%

Correlation Between Eccentric Training and Functional Tests in Subjects With Reconstructed Acl

Santos

Sousa

Medeiros

et al. 2018

Rev Bras Med Esporte

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“…Patient related factors are difficult to define for successful outcome after ACL-R. These factors are rather complex and influenced by interaction between muscle and knee function, concomitant knee pathologies, effusion, pain, limited range of motion but also by patient’s motivation [ 4 , 34 , 36 ]. Effusion and inferior quadriceps force may reduce the likelihood of return to sport [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Joint effusion, anteroposterior stability, muscle strength and degree of patellofemoral osteoarthritis significantly impact outcome following revision ACL reconstruction

et al. 2021

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Purpose: Effusion, impaired muscle function and knee instability are considered as some of the most important factors effecting outcome following anterior cruciate ligament reconstruction (ACL-R) but the impact on revision ACL-R remains unclear. It was hypothesized that these factors will significantly worsen clinical outcome following revision ACL-R. Methods Seventy knees (13 female and 57 male) were followed retrospectively after revision ACL-R at a mean follow-up of 47.8 ± 20.7 months. Clinical examination was based on the International Knee Documentation Evaluation Form-2000 (IKDC), Tegner activity scale. Instrumented measurement of anterior tibial translation was performed using the Rolimeter® (DJO Global, Freiburg, Germany). Bilateral circumference of the thigh was measured 10 and 20 cm proximal to the medial joint space. Cartilage was assessed according to Outerbridge classification during both primary and revision ACL-R. Results Tegner activity scale decreased significantly from 7.8 ± 1.4 points at primary ACL-R to 7 ± 1.8 points at revision ACL-R, and 5.8 ± 1.7 points at the time of follow up (p < 0.001). Joint effusion (r = − 0.47, p < 0.01) and side to side differences in single leg hop test (r = − 0.48, p < 0.1) significantly correlated with inferior outcome. Cartilage lesions were found in 67% of the patients at the time of revision ACL-R compared to 38% at the time of primary ACL-R. According to the IKDC classification A was graded in three patients (4.3%), B in 35 (50%), C in 29 (41.4%) and D in three (4.3%). Joint effusion was measured in 35% of patients at the time of follow-up. Degeneration at the patellofemoral compartment of > grad 2 was responsible for IKDC grade C and D (p = 0.035). Instrumented anteroposterior site-to-site difference of ≥3 mm showed significant impact on clinical outcome (p < 0.019). Conclusion The study has shown that chronic effusion, quadriceps dysfunction, cartilage lesions especially at the patellofemoral compartment and side to side difference in anteroposterior stability significantly influences patient outcome after revision ACL-R. These factors require special attention when predicting patient’s outcome. Level of evidence Level-IV, case-controlled study.

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“…Becker and Karlson [ 4 ] indicated that more attention should be paid to muscle strength and knee function instead of surgical techniques for ACLR. ACL rupture elicits changes in the extensor and flexor muscles of the knee.…”

Section: Introductionmentioning

confidence: 99%

Correlation among Knee Muscle Strength and Self-Reported Outcomes Score, Anterior Tibial Displacement, and Time Post-Injury in Non-Coper Anterior Cruciate Ligament Deficient Patients: A Cross-Sectional Study

Manchado

Álvarez

Motta

et al. 2021

IJERPH

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Little attention has been paid to knee muscle strength after ACL rupture and its effect on prognostic outcomes and treatment decisions. We studied hamstrings (H) and quadriceps (Q) strength correlation with a patient-reported outcome measures score (International Knee Documentation Committee, IKDC), anterior tibial translation (ATT), and time post-injury in 194 anterior cruciate ligament deficient patients (ACLD) who required surgery after a failed rehabilitation program (non-copers). The correlation between knee muscle strength and ATT was also studied in 53 non-injured controls. ACLD patients showed decreased knee muscle strength of both the injured and non-injured limbs. The median (interquartile range) values of the H/Q ratio were 0.61 (0.52–0.81) for patients’ injured side and 0.65 (0.57–0.8) for the non-injured side (p = 0.010). The median H/Q ratio for the controls was 0.52 (0.45–0.66) on both knees (p < 0.001, compared with the non-injured side of patients). The H/Q, ATT, and time post-injury were not significantly correlated with the IKDC score. ATT was significantly correlated with the H/Q of the injured and non-injured knees of patients, but not in the knees of the controls. Quadriceps strength and H/Q ratio were significantly correlated with ATT for both limbs of the patients. IKDC score correlated significantly with the quadriceps and hamstrings strengths of the injured limb but not with the H/Q ratio, ATT or time passed after injury.

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The role of muscle function after anterior cruciate ligament rupture and treatment

Cited by 3 publications

References 22 publications

Correlation Between Eccentric Training and Functional Tests in Subjects With Reconstructed Acl

Correlation Between Eccentric Training and Functional Tests in Subjects With Reconstructed Acl

Joint effusion, anteroposterior stability, muscle strength and degree of patellofemoral osteoarthritis significantly impact outcome following revision ACL reconstruction

Correlation among Knee Muscle Strength and Self-Reported Outcomes Score, Anterior Tibial Displacement, and Time Post-Injury in Non-Coper Anterior Cruciate Ligament Deficient Patients: A Cross-Sectional Study

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