Quadriceps and Hamstring Strength Symmetry After Anterior Cruciate Ligament Reconstruction: A Prospective Study

Harput, Gülcan; Tunay, Volga Bayrakçı; Ithurburn, Matthew P.

doi:10.1123/jsr.2019-0271

Cited by 11 publications

(8 citation statements)

References 51 publications

(91 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…35,36 Changes in strength AI were predominately achieved through changes in strength of the ACLR limb, as noted in recent literature assessing rehabilitation up to 6 months post-surgery. 37,38 Our findings extend upon these studies and suggest that the uninvolved limb may reasonably be used as a control when monitoring changes in muscle strength during later-stage rehabilitation.…”

Section: Changes In Isokinetic Strength Ai and Phase-specific Impulse...supporting

confidence: 72%

Vertical jump impulse deficits persist from six to nine months after ACL reconstruction

Costley

Miles

King

et al. 2021

Sports Biomechanics

View full text Add to dashboard Cite

Later-stage rehabilitation following ACL reconstruction (ACLR) provides a valuable opportunity to target performance deficits before return to sport. This study aimed to: 1) evaluate bilateral counter-movement jump (CMJ) phase-specific impulse and isokinetic strength inter-limb asymmetry progression from six to nine months post-ACLR; and 2) examine the extent to which individual changes in strength asymmetry could explain changes in impulse asymmetry. Male athletes (n=44) with a hamstring tendon or bone-patellar tendon-bone autograft were tested six and nine months post-ACLR. Two-way mixed-model ANOVAs were used to identify inter-session and intergraft differences in CMJ phase-specific impulse asymmetries and knee isokinetic flexor and extensor strength asymmetries, as well as in absolute impulse and strength values of independent (ACLR/uninvolved) limbs. Linear regression models were used to assess the relationship between changes in impulse asymmetry and strength asymmetry. Reductions in strength asymmetry arose from improved ACLR-limb performance, whereas concentric impulse asymmetry reduced consequent to decreased uninvolved-limb performance and eccentric deceleration impulses decreased bilaterally. Graft type did not modulate findings. Changes in strength asymmetry had little or no ability to explain changes in impulse asymmetry.Consideration of approaches which may influence persisting deficits observed bilaterally throughout vertical jumping performance post-ACLR may enhance rehabilitation practice.

show abstract

Section: Changes In Isokinetic Strength Ai and Phase-specific Impulse...supporting

confidence: 72%

Vertical jump impulse deficits persist from six to nine months after ACL reconstruction

Costley

Miles

King

et al. 2021

Sports Biomechanics

View full text Add to dashboard Cite

show abstract

“…Five studies discussed functional testing in ACL reconstruction recovery and rehabilitation [23][24][25][26][27] (Table VII). These studies compared the function and strength of injured and uninjured hip, quadriceps, and hamstring muscles 27 ; evaluated the use of LSI 24 and its alternatives 26 ; and cautioned against return-tosport criteria based on the achievement of stringent LSI values alone 23 . The authors of these studies suggested that there is benefit in integrating functional testing in return-to-sport criteria to assess the patient's return-to-sport potential and to predict a secondary injury and that hip external rotation is the only significant predictor of the hop test performance 25 .…”

Section: Hop Strength and Isokinetic Testingmentioning

confidence: 99%

“…The results of these tests assist in the identification of deficiencies in patients' muscular function or strength. Five studies discussed functional testing in ACL reconstruction recovery and rehabilitation [23][24][25][26][27] (Table VII). These studies compared the function and strength of injured and uninjured hip, quadriceps, and hamstring muscles 27 ; evaluated the use of LSI 24 and its alternatives 26 ; and cautioned against return-tosport criteria based on the achievement of stringent LSI values alone 23 .…”

Section: Hop Strength and Isokinetic Testingmentioning

confidence: 99%

Anterior Cruciate Ligament Reconstruction Recovery and Rehabilitation

Glattke

Tummala²,

Chhabra³

2021

Journal of Bone and Joint Surgery

View full text Add to dashboard Cite

Background: The success of anterior cruciate ligament (ACL) reconstruction is influenced by effective rehabilitation. Previously published, comprehensive systematic reviews evaluating rehabilitation after ACL reconstruction have studied Level-I and II evidence published through 2012. Interval studies continue to evaluate the efficacy of various rehabilitative modalities.Methods: A total of 824 articles from 2012 to 2020 were identified using multiple search engines. Fifty Level-I or II studies met inclusion criteria and were evaluated using the Consolidated Standards of Reporting Trials (CONSORT) criteria and National Institutes of Health (NIH) Study Quality Assessment Tools.Results: Accelerated rehabilitation can be effective for patients with semitendinosus-gracilis grafts. Blood flow restriction (BFR) training with high-intensity exercise is not effective for ACL reconstruction recovery. Postoperative bracing does not offer any advantages or improve limb asymmetry. Cryotherapy is an effective analgesic when used perioperatively. The early introduction of open kinetic chain exercises may improve ACL reconstruction outcomes, and high-intensity plyometric exercise is not effective. Estimated pre-injury capacity (EPIC) levels may be more accurate than the Limb Symmetry Index (LSI) when using functional test results to predict reinjury rates, and hip external rotation strength may be the most accurate predictor of the hop test performance. Nerve blocks can provide postoperative analgesia with minimal complication risk. Neuromuscular electrical stimulation is effective when used independently and in combination with rehabilitative exercises. Psychological readiness should be evaluated both objectively and subjectively before allowing patients to safely return to sport. Electromyography biofeedback may help to regain muscular function, and whole-body vibration therapy can improve postural control. Supervised rehabilitation is more effective than unsupervised rehabilitation.Conclusions: Various rehabilitative modalities following ACL reconstruction are effective in improving surgical outcomes and return-to-sport rates. Further evidence and improved study design are needed to further validate modalities including accelerated rehabilitation, BFR training, functional testing, and return-to-sport criteria.

show abstract

“…A reduction in strength and neuromuscular coordination are associated with injury (Wilson et al 2020;Harput et al 2020;Ward et al 2015) and disease (Milosevic et al 2017;Stock et al 2019), whilst strength is a key quality of athletic performance (Joffe and Tallent 2020). Consequently, the enhancement of strength and neuromuscular coordination through maximising neurological adaptation is vital.…”

Section: Implications For Rehabilitation and Athletic Performancementioning

confidence: 99%

Corticospinal and spinal adaptations to motor skill and resistance training: Potential mechanisms and implications for motor rehabilitation and athletic development

et al. 2021

View full text Add to dashboard Cite

Optimal strategies for enhancing strength and improving motor skills are vital in athletic performance and clinical rehabilitation. Initial increases in strength and the acquisition of new motor skills have long been attributed to neurological adaptations. However, early increases in strength may be predominantly due to improvements in inter-muscular coordination rather than the force generating capacity of the muscle. Despite the plethora of research investigating neurological adaptations from motor skill or resistance training in isolation, little effort has been made in consolidating this research to compare motor skill and resistance training adaptations. The findings of this review demonstrated that motor skill and resistance training adaptations show similar shortterm mechanisms of adaptations, particularly at a cortical level. Increases in corticospinal excitability and a release in short-interval cortical inhibition occur as a result of the commencement of both resistance and motor skill training. Spinal changes show evidence of task-specific adaptations from the acquired motor skill, with an increase or decrease in spinal reflex excitability, dependant on the motor task. An increase in synaptic efficacy of the reticulospinal projections is likely to be a prominent mechanism for driving strength adaptations at the subcortical level, though more research is needed. Transcranial electric stimulation has been shown to increase corticospinal excitability and augment motor skill adaptations, but limited evidence exists for further enhancing strength adaptations from resistance training. Despite the logistical challenges, future work should compare the longitudinal adaptations between motor skill and resistance training to further optimise exercise programming.

show abstract

Quadriceps and Hamstring Strength Symmetry After Anterior Cruciate Ligament Reconstruction: A Prospective Study

Cited by 11 publications

References 51 publications

Vertical jump impulse deficits persist from six to nine months after ACL reconstruction

Vertical jump impulse deficits persist from six to nine months after ACL reconstruction

Anterior Cruciate Ligament Reconstruction Recovery and Rehabilitation

Corticospinal and spinal adaptations to motor skill and resistance training: Potential mechanisms and implications for motor rehabilitation and athletic development

Contact Info

Product

Resources

About