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https://www.readbyqxmd.com/read/29922375/changes-in-injury-risk-mechanisms-after-soccer-specific-fatigue-in-male-youth-soccer-players
#1
Michal Lehnert, Mark De Ste Croix, Zuzana Xaverova, Michal Botek, Renata Varekova, Amr Zaatar, Ondrej Lastovicka, Petr Stastny
The aim of this study was to examine the acute effects of soccer specific fatigue on muscular and neuromuscular function in male youth soccer players. Elite soccer players (n = 20; age 15.7 ± 0.5 y; body height 177.75 ± 6.61 cm; body mass 67.28 ± 8.29 kg) were measured before and after soccer specific exercise (SAFT90 ). The reactive strength index (RSI) was determined by a drop jump test, leg stiffness (LS) by a 20 sub-maximal two-legged hopping test, and a functional hamstring to quadriceps strength ratio from isokinetic concentric and eccentric strength of the dominant and non-dominant leg (measured at angular velocities of 1...
June 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29897309/great-toe-drop-following-knee-ligament-reconstruction-a-case-report
#2
David A Boyce, Chantal Prewitt
CASE DESCRIPTION: A 17-year-old male post anterior cruciate ligament reconstruction complained of the inability to extend his great toe immediately following surgery. BACKGROUND: Neurological injuries following knee arthroscopy have been reported to occur between 0.6%-2.5%. The most commonly injured nerves are the saphenous and common fibular nerve (CFN). Great toe-drop secondary to isolated denervation of the extensor hallucis longus (EHL), has only been reported one time in the literature...
June 13, 2018: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/29893603/quadriceps-neuromuscular-function-in-patients-with-anterior-cruciate-ligament-reconstruction-with-or-without-knee-osteoarthritis-a-cross-sectional-study
#3
Grant E Norte, Jay N Hertel, Susan A Saliba, David R Diduch, Joseph M Hart
CONTEXT:   Central and peripheral neural adaptations have been identified after anterior cruciate ligament (ACL) injury and reconstruction (ACLR) and are hypothesized to contribute to posttraumatic muscle dysfunction. Limited evidence exists about the temporal nature of neuromuscular adaptations during early and late-term phases of recovery after ACLR, and no researchers have studied patients with posttraumatic osteoarthritis. OBJECTIVE:   To compare quadriceps neuromuscular function less than 2 years ( early) and more than 2 years ( late) after ACLR, including in patients who experienced posttraumatic knee osteoarthritis...
June 12, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29886009/the-relationship-between-performance-on-the-modified-star-excursion-balance-test-and-the-knee-muscle-strength-before-and-after-anterior-cruciate-ligament-reconstruction
#4
Paula Calori Domingues, Felipe de Souza Serenza, Thiago Batista Muniz, Luciano Fonseca Lemos de Oliveira, Rodrigo Salim, Fabricio Fogagnolo, Mauricio Kfuri, Aline Miranda Ferreira
OBJECTIVES: The objective of this study was to evaluate the dynamic balance of the injured and uninjured limb before and after the anterior cruciate ligament (ACL) reconstruction and compare with the control group. STUDY DESIGN: Prospective longitudinal. SETTING: Biomechanics laboratory. PARTICIPANTS: Participants are 24 males (mean age, 27.5 years) with unilateral ACL injury (ACLG) and 24 male healthy volunteers (CG)...
June 6, 2018: Knee
https://www.readbyqxmd.com/read/29867521/muscle-activation-during-acl-injury-risk-movements-in-young-female-athletes-a-narrative-review
#5
REVIEW
Jesper Bencke, Per Aagaard, Mette K Zebis
Young, adolescent female athletes are at particular high risk of sustaining a non-contact anterior cruciate ligament (ACL) injury during sport. Through the last decades much attention has been directed toward various anatomical and biomechanical risk factors for non-contact ACL injury, and important information have been retrieved about the influence of external loading factors on ACL injury risk during given sports-specific movements. However, much less attention has been given to the aspect of neuromuscular control during such movements and only sparse knowledge exists on the specific muscle activation patterns involved during specific risk conditions...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29803125/neuromechanical-response-to-passive-cyclic-loading-of-the-acl-in-non-professional-soccer-players-a-pilot-study
#6
Stefano Nuccio, Luciana Labanca, Jacopo Emanuele Rocchi, Andrea Macaluso, Paola Sbriccoli
OBJECTIVE: To investigate the effects of passive cyclic loading (CYC) on anterior tibial translation (ATT), knee extensor and flexor muscle strength and activation in soccer players. DESIGN: Cross-sectional study. SETTING: Functional Assessment Laboratory; Participants: Eight healthy competitive soccer players. INTERVENTIONS: The knee of the dominant limb was subjected to 10 min of CYC at 200 N force. MAIN OUTCOMES MEASURES: ATT was measured before and after CYC...
May 15, 2018: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29796857/cross-education-does-not-accelerate-the-rehabilitation-of-neuromuscular-functions-after-acl-reconstruction-a-randomized-controlled-clinical-trial
#7
Tjerk Zult, Alli Gokeler, Jos J A M van Raay, Reinoud W Brouwer, Inge Zijdewind, Jonathan P Farthing, Tibor Hortobágyi
PURPOSE: Cross-education reduces quadriceps weakness 8 weeks after anterior cruciate ligament (ACL) surgery, but the long-term effects are unknown. We investigated whether cross-education, as an adjuvant to the standard rehabilitation, would accelerate recovery of quadriceps strength and neuromuscular function up to 26 weeks post-surgery. METHODS: Group allocation was randomized. The experimental (n = 22) and control (n = 21) group received standard rehabilitation...
May 23, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29749751/visual-motor-control-of-drop-landing-after-anterior-cruciate-ligament-reconstruction
#8
Dustin R Grooms, Ajit Chaudhari, Stephen J Page, Deborah S Nichols-Larsen, James A Onate
CONTEXT:   Visual feedback is crucial in the control of human movement. When vision is obstructed, alterations in landing neuromuscular control may increase movements that place individuals at risk for injury. Anterior cruciate ligament (ACL) injury may further alter the motor-control response to alterations in visual feedback. The development of stroboscopic glasses that disrupt visual feedback without fully obscuring it has enabled researchers to assess visual-motor control during movements that simulate the dynamic demands of athletic activity...
May 11, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29667429/quadriceps-function-knee-pain-and-self-reported-outcomes-in-patients-with-anterior-cruciate-ligament-reconstruction
#9
Adam S Lepley, Brian Pietrosimone, Marc L Cormier
CONTEXT:   Interactions among muscle strength, pain, and self-reported outcomes in patients with anterior cruciate ligament reconstruction (ACLR) are not well understood. Clarifying these interactions is of clinical importance because improving physical and psychological function is thought to optimize outcomes after ACLR. OBJECTIVE:   To examine the relationships among neuromuscular quadriceps function, pain, self-reported knee function, readiness to return to activity, and emotional response to injury both before and after ACLR...
April 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29584523/brain-behavior-mechanisms-for-the-transfer-of-neuromuscular-training-adaptions-to-simulated-sport-initial-findings-from-the-train-the-brain-project
#10
Dustin R Grooms, Adam W Kiefer, Michael A Riley, Jonathan D Ellis, Staci Thomas, Katie Kitchen, Christopher DiCesare, Scott Bonnette, Brooke Gadd, Kim D Barber Foss, Weihong Yuan, Paula Silva, Ryan Galloway, Jed Diekfuss, James Leach, Kate Berz, Gregory D Myer
CONTEXT: A limiting factor for reducing anterior cruciate ligament (ACL) injury risk is ensuring that the movement adaptions made during the prevention program transfer to sport-specific activity. Virtual reality provides a mechanism to assess transferability and neuroimaging provides a means to assay the neural processes allowing for such skill transfer. OBJECTIVE: To determine the neural mechanisms for injury risk reducing biomechanics transfer to sport after ACL injury prevention training...
March 27, 2018: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29558161/clinical-efficacy-of-jump-training-augmented-with-body-weight-support-after-acl-reconstruction-a-randomized-controlled-trial
#11
Audrey R C Elias, Kari J Harris, Paul C LaStayo, Ryan L Mizner
BACKGROUND: Limited knee flexion and increased muscle co-contraction during jump landing are believed to diminish outcomes after anterior cruciate ligament (ACL) reconstruction. The efficacy of jump training to improve patients' mechanical and neuromuscular deficits is understudied. HYPOTHESIS: Jump training will improve functional, mechanical, and neuromuscular outcomes and higher repetition training augmented by body weight support will result in better retention of gains...
March 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29544359/altered-lower-extremity-joint-mechanics-occur-during-the-star-excursion-balance-test-and-single-leg-hop-after-acl-reconstruction-in-a-collegiate-athlete
#12
Michael A Samaan, Stacie I Ringleb, Sebastian Y Bawab, Eric K Greska, Joshua T Weinhandl
The effects of ACL-reconstruction on lower extremity joint mechanics during performance of the Star Excursion Balance Test (SEBT) and Single Leg Hop (SLH) are limited. The purpose of this study was to determine if altered lower extremity mechanics occur during the SEBT and SLH after ACL-reconstruction. One female Division I collegiate athlete performed the SEBT and SLH tasks, bilaterally, both before ACL injury and 27 months after ACL-reconstruction. Maximal reach, hop distances, lower extremity joint kinematics and moments were compared between both time points...
March 2018: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/29484243/maximal-hip-and-knee-muscle-strength-are-not-related-to-neuromuscular-pre-activity-during-sidecutting-maneuver-a-cross-sectional-study
#13
Rasmus S Husted, Jesper Bencke, Per Hölmich, Lars L Andersen, Kristian Thorborg, Thomas Bandholm, Bjørn Gliese, Hanne B Lauridsen, Grethe Myklebust, Per Aagaard, Mette K Zebis
Background: Reduced lower extremity muscle strength as well as reduced lower extremity muscle pre-activity (defined as muscular activity just prior to initial ground contact) during high-risk movements are factors related to increased risk of non-contact ACL injury in adolescent female athletes. A strong relationship exists between muscle strength and muscle activity obtained during an isometric contraction, however, whether these two measures are related when muscle activity is obtained during a movement associated with a high risk of non-contact ACL injury is not known...
February 2018: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/29433043/increased-movement-variability-in-one-leg-hops-about-20-years-after-treatment-of-anterior-cruciate-ligament-injury
#14
Divya Srinivasan, Eva Tengman, Charlotte K Häger
BACKGROUND: Recent studies highlight the need for understanding movement control of adjacent joints when evaluating knee function following anterior cruciate ligament (ACL) injury. However, while short-term adaptations to lower-extremity joint coupling have been studied, little is known about any potential long-term adaptations in neuromuscular control displayed by ACL-injured individuals. The aim of our study was to determine whether coordination variability of the hip-knee joint couplings during the one-leg hop is altered about 20 years after injury in two ACL-injured groups compared to healthy knee controls...
March 2018: Clinical Biomechanics
https://www.readbyqxmd.com/read/29373984/the-effect-of-targeted-exercise-on-knee-muscle-function-in-patients-with-persistent-hamstring-deficiency-following-acl-reconstruction-study-protocol-for-a-randomized-controlled-trial
#15
Bo Bregenhof, Uffe Jørgensen, Per Aagaard, Nis Nissen, Mark W Creaby, Jonas Bloch Thorlund, Carsten Jensen, Trine Torfing, Anders Holsgaard-Larsen
BACKGROUND: Anterior cruciate ligament (ACL) reconstruction, using hamstring auto-graft is a common surgical procedure, which often leads to persistent hamstring muscle-strength deficiency and reduced function. The purpose of this randomized controlled trial (RCT) is to investigate the effect of a combined, progressive, strength and neuromuscular exercise intervention on knee muscle strength, functional capacity and hamstring muscle-tendon morphology in ACL-reconstructed patients with persistent hamstring muscle-strength deficiency compared with controls...
January 26, 2018: Trials
https://www.readbyqxmd.com/read/29329889/exploring-individual-adaptations-to-an-anterior-cruciate-ligament-injury-prevention-programme
#16
Aaron S Fox, Jason Bonacci, Scott G McLean, Natalie Saunders
BACKGROUND: Individual responses to anterior cruciate ligament injury prevention programmes (ACL IPPs) have received little attention. This study examined the effects of an ACL IPP on neuromuscular control and lower limb biomechanics during landing at the group and individual levels. METHODS: Sixteen female athletes were randomly allocated to training (n=8) or control (n=8) groups. Electromyography, and three-dimensional kinematic and kinetic data were collected during landing at two testing sessions...
January 2018: Knee
https://www.readbyqxmd.com/read/29314903/national-athletic-trainers-association-position-statement-prevention-of-anterior-cruciate-ligament-injury
#17
Darin A Padua, Lindsay J DiStefano, Timothy E Hewett, William E Garrett, Stephen W Marshall, Grace M Golden, Sandra J Shultz, Susan M Sigward
OBJECTIVE:   To provide certified athletic trainers, physicians, and other health care and fitness professionals with recommendations based on current evidence regarding the prevention of noncontact and indirect-contact anterior cruciate ligament (ACL) injuries in athletes and physically active individuals. BACKGROUND:   Preventing ACL injuries during sport and physical activity may dramatically decrease medical costs and long-term disability. Implementing ACL injury-prevention training programs may improve an individual's neuromuscular control and lower extremity biomechanics and thereby reduce the risk of injury...
January 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29290539/is-acl-reconstruction-a-prerequisite-for-the-patients-having-recreational-sporting-activities
#18
Emrah Kovalak, Tolga Atay, Cem Çetin, I Meltem Atay, Mustafa Onur Serbest
OBJECTIVE: Whether surgical or conservative treatment is more effective in allowing patients to return to physical activity after anterior cruciate ligament (ACL) injury is controversial. We sought to compare mid-term outcome measures between isolated ACL tear patients who underwent reconstruction followed by closed kinetic chain exercises and those who underwent neuromuscular training only. METHODS: We retrospectively evaluated patients with ACL tears who underwent post-surgery CKC strength training after ACL reconstruction (Group A), and patients who only underwent neuromuscular training (Group B) with a minimum follow-up time of 5 years...
January 2018: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/29172648/prevention-of-knee-and-anterior-cruciate-ligament-injuries-through-the-use-of-neuromuscular-and-proprioceptive-training-an-evidence-based-review
#19
Lucas Dargo, Kelsey J Robinson, Kenneth E Games
Reference/Citation:  Donnell-Fink LA, Klara K, Collins JE, et al. Effectiveness of knee injury and anterior cruciate ligament tear prevention programs: a meta-analysis. PLoS One. 2015;10(12)e0144063. CLINICAL QUESTION:   Is neuromuscular and proprioceptive training effective in preventing knee and anterior cruciate ligament (ACL) injuries? DATA SOURCES:   The authors searched CINAHL, Cochrane Central Register of Controlled Trials, MEDLINE/EMBASE, PubMed, and Web of Science databases from 1996 through December 2014 and limited the results to peer-reviewed manuscripts published in English...
December 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/29169096/neuromuscular-compensatory-strategies-at-the-trunk-and-lower-limb-are-not-resolved-following-an-acl-reconstruction
#20
Grant Boggess, Kristin Morgan, Darren Johnson, Mary Lloyd Ireland, Jeffrey A Reinbolt, Brian Noehren
BACKGROUND: Following anterior cruciate ligament reconstruction (ACLR), patients present with greater trunk ipsilateral lean, which may affect knee kinetics and increase re-injury risk. However, there has been little research into neuromuscular factors controlling the trunk and their relation to the knee between healthy and ACLR subjects. This is critical to establish in order to develop more directed and effective interventions. HYPOTHESIS: As compared to healthy control subjects, ACLR subjects will demonstrate increased erector spinae and rectus abdominis co-contraction, greater rectus abdominis force and greater hamstring force that is correlated to increased forward trunk lean...
February 2018: Gait & Posture
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