Single-leg hop mechanics are correlated with self-reported knee function early after anterior cruciate ligament reconstruction

Chen, Albert J.; Tatarski, Rachel L.; Perry, Jennifer A.; Quatman, Carmen E.; Hewett, Timothy E.; Stasi, Stephanie Di

doi:10.1016/j.clinbiomech.2019.12.020

Cited by 4 publications

(5 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…12 Similarly, lower KOOS indicating lower self-reported knee function have been shown to be related to sagittal plane knee moments in patients 8 months after ACL reconstruction. 6 Our work reinforces these findings and expands on them to show ACL patients with IKDC scores ≥89 are likely to restore symmetrical knee loading during landing at the time they return to activity.…”

Section: Discussionsupporting

confidence: 77%

Factors That Predict Sagittal Plane Knee Biomechanical Symmetry After Anterior Cruciate Ligament Reconstruction: A Decision Tree Analysis

Palmieri-Smith

Curran

Garcia

et al. 2021

Sports Health: A Multidisciplinary Approach

View full text Add to dashboard Cite

Background: Biomechanical knee asymmetry is commonly present after anterior cruciate ligament (ACL) reconstruction. Factors that could assist in identification of asymmetrical biomechanics after ACL reconstruction could help clinicians in making return-to-play decisions. The purpose of this study is to determine factors that may contribute to knee biomechanical asymmetry present after ACL reconstruction. Hypothesis: We hypothesized that quadriceps strength and activation and patient-reported function would allow for identification of patients with symmetrical knee biomechanics. Study Design: Cross-sectional study. Level of Evidence: Level 3. Methods: Thirty-one subjects (18 women; time since ACL reconstruction = 284.4 ± 53.6 days) who underwent ACL reconstruction and were to return to activity were recruited. Participants completed bilateral assessments of isokinetic quadriceps strength, quadriceps activation using the superimposed burst technique, and biomechanical function testing during a single-leg forward hop. The International Knee Documentation Committee (IKDC) subjective knee form was also completed. Symmetry values were calculated for each variable. Decision trees were utilized to determine which input factors (quadriceps strength symmetry, quadriceps activation symmetry, IKDC score, age, sex, height, mass, graft type) were able to identify participants who had symmetrical knee flexion angles (KFAs) and extension moments. Angles and moments were considered symmetrical if symmetry values were ≥90%. Results: Quadriceps strength and activation symmetry were able to predict whether a patient landed with symmetrical or asymmetrical KFAs, with thresholds of 77.2% strength symmetry and 91.3% activation symmetry being established. Patient-reported function and quadriceps strength were factors that allowed for classification of participants with symmetrical/asymmetrical knee extension moments, with thresholds of 89.1 for the IKDC and 80.0% for quadriceps strength symmetry. Conclusions: Quadriceps strength contributed to both models and appears to be a critical factor for achieving symmetrical knee biomechanics. High patient-reported function and quadriceps activation are also important for restoring knee biomechanical symmetry after ACL reconstruction. Clinical Relevance: Quadriceps strength and activation and patient-reported function may be able to assist clinicians in identifying ACL patients with symmetrical/asymmetrical knee biomechanics.

show abstract

Section: Discussionsupporting

confidence: 77%

Factors That Predict Sagittal Plane Knee Biomechanical Symmetry After Anterior Cruciate Ligament Reconstruction: A Decision Tree Analysis

Palmieri-Smith

Curran

Garcia

et al. 2021

Sports Health: A Multidisciplinary Approach

View full text Add to dashboard Cite

show abstract

“…Mansson et al (2014) found that hop test values were within 93% of the ACL-intact limb. Chen et al (2020) state that a lack of hop test difference between ACLR symptomatic and asymptomatic groups may indicate that the asymptomatic group was doing quite well functionally. Our results differ from previous reports (Anderson, 2002;Sernert, 1999) that did find significant differences across the dependent variables that we measured.…”

Section: Discussionmentioning

confidence: 98%

“…Failure of the anterior cruciate ligament (ACL) is a common injury (>200k annually) that has a number of negative consequences, such as time-lost from sport, decreased quality of life and increased risk for long-term complications (Chen et al, 2020;Cavanaugh, et al, 2017). The goal of any rehabilitation program is to return a patient to a level of homeostasis and function related to their life and/or sport goals.…”

Section: Introductionmentioning

confidence: 99%

“…Despite awareness of the need for better outcomes for athletes returning to play following ACLR, there remains significant inconsistency in the criteria used for return to sport clearance and no clear guidelines on the transition from being "cleared" to being ready for full competition (deMille et al, 2017). While rehabilitation programs have transitioned from time-based to criterion-based protocols and can lead to normal function and return to activity, muscle strength and proprioceptive impairments have been found to still exist post-surgery (Ageberg et al, 2009;Cavanaugh et al, 2017;Chen et al, 2020;Kvist, 2005). Significant loss of muscle strength, primarily evidenced in the quadriceps and hamstrings, has been found up to five years post reconstructive surgery (Keays et al, 2001;Henry et al 2005) and this loss in muscle strength has been associated with a decrease in knee joint stability (Mattacola et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…Additional objective evaluations of ACLR include isokinetic muscle torques combined with functional tests, such as the one-leg hop for distance (Almqvist et al, 2009;Cavanaugh et al, 2017;Noyes et al, 1991;Davies et al, 2017). The one-leg hop test is used to evaluate patient-perceived knee performance and predict long-term outcomes of ACLR and is one of the most important readiness tests for the patient (Almqvist et al, 2009;Chen et al, 2020;Davies et al, 2017;Mansson et al, 2014;Moller et al, 2009). Filbay et al (2018) concluded that a one-leg hop test for distance with a limb symmetry index (LSI) of less than 89% at 3-7 year follow-up was associated with more pain and symptoms, worse sport and recreation function and a reduced quality of life.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Assessment of Post-Rehabilitation ACL Reconstructed Knees

Carlson

2020

IJKSS

View full text Add to dashboard Cite

Background: Understanding objective measures of ACL-reconstructed knee function is important in determining the efficacy of rehabilitation protocols and a patient’s return to activities of daily living and sport activities. Objective: To assess the range of motion (ROM), isokinetic strength (torque) and functional performance measures (hop test) of ACL-reconstructed and ACL-intact knees. Methods: Twelve volunteers (5 females, 7 males) with unilateral ACL injury and reconstruction were given a battery of tests (hop test for distance, knee range of motion, knee extensor isokinetic testing to assess both affected and unaffected lower limb function, flexibility and strength. Main effects and interactions were analyzed by mixed-model repeated measures ANCOVA. Dependent variables included hop test for distance, knee flexion and extension range of motion, and knee extensor isokinetic torque. The independent variables were the intact/reconstructed ACL knee and time from surgery. Sex was the covariate. Results: No statistically significant differences (p>0.05) were found across all dependent variables hop test for distance (P = 0.939), knee flexion (P = 0.576) and extension (P = 0.431) ROM, and knee extensor torque (eccentric P = 0.923 and concentric P = 0.723) for the main effects and interactions of knee (ACL-reconstructed and ACL-intact) and time (0-12 months, 13-24 months, 25-36 months and 37+ months). The covariate, sex, did produce significant differences for the hop test (P < 0.0001) and isokinetic testing (eccentric peak torque P = 0.003 and concentric peak torque P=0.012). Conclusions: Clinicians may consider present rehabilitation protocols to be adequate in developing ROM and isokinetic strength following ACL reconstruction. However, greater improvements in ROM and strength may be achieved over an extended period following ACL reconstruction surgery.

show abstract

The relationship between kinesiophobia and biomechanics in anterior cruciate ligament reconstructed females

Dudley

Lohman

Patterson

et al. 2022

Physical Therapy in Sport

View full text Add to dashboard Cite

Single-leg hop mechanics are correlated with self-reported knee function early after anterior cruciate ligament reconstruction

Cited by 4 publications

References 42 publications

Factors That Predict Sagittal Plane Knee Biomechanical Symmetry After Anterior Cruciate Ligament Reconstruction: A Decision Tree Analysis

Factors That Predict Sagittal Plane Knee Biomechanical Symmetry After Anterior Cruciate Ligament Reconstruction: A Decision Tree Analysis

Assessment of Post-Rehabilitation ACL Reconstructed Knees

The relationship between kinesiophobia and biomechanics in anterior cruciate ligament reconstructed females

Contact Info

Product

Resources

About