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https://www.readbyqxmd.com/read/27935419/is-there-really-an-eccentric-action-of-the-hamstrings-during-the-swing-phase-of-high-speed-running-part-ii-implications-for-exercise
#1
Bas Van Hooren, Frans Bosch
We have previously argued that there may actually be no significant eccentric, but rather predominantly an isometric action of the hamstring muscle fibres during the swing phase of high-speed running when the attachment points of the hamstrings are moving apart. Based on this we suggested that isometric rather than eccentric exercises are a more specific way of conditioning the hamstrings for high-speed running. In this review we argue that some of the presumed beneficial adaptations following eccentric training may actually not be related to the eccentric muscle fibre action, but to other factors such as exercise intensity...
December 9, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27923626/limitations-in-predicting-outcome-following-primary-acl-reconstruction-with-single-bundle-hamstring-autograft-a-systematic-review
#2
REVIEW
Vincent Vg An, Corey Scholes, Vikram A Mhaskar, William Hadden, David Parker
BACKGROUND: Anterior cruciate ligament reconstruction (ACLR) is one of the most well studied and performed procedures in the world. Thus, it would be useful to develop a tool to predict patient outcomes post-operatively to allow clinicians to optimise management. PURPOSE: To identify and summarise factors predictive of graft failure and patient-reported outcome (PROM) measures at minimum two years after ACLR with single-bundle quadruple hamstring autograft via the anteromedial portal technique...
December 3, 2016: Knee
https://www.readbyqxmd.com/read/27918690/the-advantages-of-normalizing-emg-to-ballistic-rather-than-isometric-or-isokinetic-tasks
#3
Stephen M Suydam, Kurt Manal, Thomas S Buchanan
Isometric tasks have been a standard for electromyography (EMG) normalization stemming from anatomic and physiologic stability observed during contraction. Ballistic dynamic tasks have the benefit of eliciting maximum EMG signals for normalization, despite having the potential for greater signal variability. It is the purpose of this study to compare maximum voluntary isometric contraction (MVIC) to non-isometric tasks with increasing degrees of extrinsic variability, i.e., joint range of motion, velocity, rate of contraction, etc...
December 5, 2016: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/27914184/the-potential-use-of-ultrasound-magnetic-resonance-imaging-fusion-applications-in-musculoskeletal-intervention
#4
Christopher J Burke, Jenny Bencardino, Ronald Adler
We sought to assess the potential use of an application allowing real-time ultrasound spatial registration with previously acquired magnetic resonance imaging in musculoskeletal procedures. The ultrasound fusion application was used to perform a range of outpatient procedures including piriformis, sacroiliac joint, pudendal and intercostal nerve perineurial injections, hamstring-origin calcific tendonopathy barbotage, and 2 soft tissue biopsies at our institution in 2015. The application was used in a total of 7 procedures in 7 patients, all of which were technically successful...
December 3, 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/27907934/restriction-of-postoperative-joint-loading-in-a-murine-model-of-anterior-cruciate-ligament-reconstruction-botulinum-toxin-paralysis-and-external-fixation
#5
Amir Lebaschi, Xiang-Hua Deng, Nathan W Coleman, Christopher L Camp, Jianchun Zong, Andrew Carbone, Camila B Carballo, Guang-Ting Cong, Zoe M Album, Scott A Rodeo
Control of knee motion in small animal models is necessary to study the effect of mechanical load on the healing process. This can be especially challenging in mice, which are being increasingly used for various orthopedic reconstruction models. We explored the feasibility of botulinum toxin (Botox; Allergan, Dublin, Ireland) paralysis and a newly designed external fixator to restrict motion of the knee in mice undergoing anterior cruciate ligament (ACL) reconstruction. Nineteen C57BL/6 mice were allocated to two groups: (1) Botox group (n = 9) and (2) external fixator group (n = 10)...
December 1, 2016: Journal of Knee Surgery
https://www.readbyqxmd.com/read/27904792/current-concepts-and-treatment-of-patellofemoral-compressive-issues
#6
Michael J Mullaney, Takumi Fukunaga
Patellofemoral disorders, commonly encountered in sports and orthopedic rehabilitation settings, may result from dysfunction in patellofemoral joint compression. Osseous and soft tissue factors, as well as the mechanical interaction of the two, contribute to increased patellofemoral compression and pain. Treatment of patellofemoral compressive issues is based on identification of contributory impairments. Use of reliable tests and measures is essential in detecting impairments in hip flexor, quadriceps, iliotibial band, hamstrings, and gastrocnemius flexibility, as well as in joint mobility, myofascial restrictions, and proximal muscle weakness...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27900339/an-ecological-study-of-anterior-cruciate-ligament-reconstruction-part-1-clinical-tests-do-not-correlate-with-return-to-sport-outcomes
#7
Timothy M McGrath, Gordon Waddington, Jennie M Scarvell, Nick Ball, Rob Creer, Kevin Woods, Damian Smith, Roger Adams
BACKGROUND: Additional high-quality prospective studies are needed to better define the objective criteria used in relation to return-to-sport decisions after synthetic (ligament advanced reinforcement system [LARS]) and autograft (hamstring tendon [2ST/2GR]) anterior cruciate ligament (ACL) reconstruction in active populations. PURPOSE: To prospectively investigate and describe the recovery of objective clinical outcomes after autograft (2ST/2GR) and synthetic (LARS) ACL reconstructions, as well as to investigate the relationship between these clinimetric test outcomes and return-to-sport activity (Tegner activity scale [TAS] score) at 12 and 24 months postoperatively...
November 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/27900338/the-bridge-enhanced-anterior-cruciate-ligament-repair-bear-procedure-an-early-feasibility-cohort-study
#8
Martha M Murray, Brett M Flutie, Leslie A Kalish, Kirsten Ecklund, Braden C Fleming, Benedikt L Proffen, Lyle J Micheli
BACKGROUND: This study assessed the safety of the newly developed bridge-enhanced anterior cruciate ligament (ACL) repair (BEAR), which involves suture repair of the ligament combined with a bioactive scaffold to bridge the gap between the torn ligament ends. As the intra-articular environment is complex in its response to implanted materials, this study was designed to determine whether there would be a significant rate of adverse reaction to the implanted scaffold. HYPOTHESIS: The primary hypothesis was that the implanted scaffold would not result in a deep joint infection (arthrocentesis with positive culture) or significant inflammation (clinical symptoms justifying arthrocentesis but negative culture)...
November 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/27900300/treatment-of-proximal-hamstring-tendinopathy-related-sciatic-nerve-entrapment-presentation-of-an-ultrasound-guided-intratissue-percutaneous-electrolysis-application
#9
Gabriele Mattiussi, Carlos Moreno
BACKGROUND: Proximal Hamstring Tendinopathy-related Sciatic Nerve Entrapment (PHTrSNE) is a neuropathy caused by fibrosis interposed between the semimembranosus tendon and the sciatic nerve, at the level of the ischial tuberosity. METHODS: Ultrasound-guided Intratissue Percutaneous Electrolysis (US-guided EPI) involves galvanic current transfer within the treatment target tissue (fibrosis) via a needle 0.30 to 0.33 mm in diameter. The galvanic current in a saline solution instantly develops the chemical process of electrolysis, which in turn induces electrochemical ablation of fibrosis...
April 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/27896365/-complete-proximal-hamstring-tendon-tear-anchor-based-sliding-suture-technique-for-reduction-and-fixation
#10
S Bauer, M Riegger, W Reichert, W G Blakeney, C Haag
No abstract text is available yet for this article.
November 28, 2016: Der Unfallchirurg
https://www.readbyqxmd.com/read/27896364/-proximal-rupture-of-the-hamstring-tendon-from-clinical-presentation-to-diagnosis-and-therapy
#11
S Bauer, M Riegger, K J Friedrich, W Reichert, W G Blakeney, C Haag
Rupture of the proximal tendon enthesis of the hamstring muscle (ICM) accounts for approximately 10% of all injuries of the ICM. It occurs most commonly in athletes and active middle-aged individuals. The complete rupture of all three tendons in active patients is generally seen as an indication for surgical repair of the tendon enthesis; however, the correct diagnosis is often not reached in a timely manner. This can lead to prolonged symptoms with pain, weakness and neuralgia. Operative treatment consists of anchor repair of the tendons resulting in good clinical outcome in several case series...
November 28, 2016: Der Unfallchirurg
https://www.readbyqxmd.com/read/27896290/do-clinical-results-and-return-to-sport-rates-after-ulnar-collateral-ligament-reconstruction-differ-based-on-graft-choice-and-surgical-technique
#12
Brandon J Erickson, Gregory L Cvetanovich, Rachel M Frank, Bernard R Bach, Mark S Cohen, Charles A Bush-Joseph, Brian J Cole, Anthony A Romeo
BACKGROUND: Ulnar collateral ligament reconstruction (UCLR) has become a common procedure performed in overhead-throwing athletes of many athletic levels. PURPOSE/HYPOTHESIS: The purpose of this study was to determine whether clinical outcomes and return-to-sport (RTS) rates differ among patients undergoing UCLR based on graft choice, surgical technique, athletic competition level, handedness, and treatment of the ulnar nerve. We hypothesized that no differences would exist in clinical outcomes or RTS rates between technique, graft choice, or other variables...
November 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/27893474/hypertrophy-and-explosive-reactive-functioning-in-sedentary-men-following-10-weeks-of-whole-body-vibration
#13
Jens Ebing, Ulf Gast, Christoph Hauptmann, Dieter Felsenberg, Daniel L Belavý
The objective of this study was to determine the impact of vertical (Power-plate; POW) and side-alternating (Galileo; GAL) whole-body vibration exercise on muscle mass and lower-limb neuromuscular function. Forty-three sedentary male subjects (18-30yr) randomized into three groups underwent two upper-body exercise sessions per week for 10 weeks. Two groups of subjects underwent additional squat exercises on the GAL (N=15) or POW (N=14) devices. The third group was control. On magnetic resonance imaging, volume of the thigh muscles was measured...
November 16, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27892743/muscle-strength-and-knee-range-of-motion-after-femoral-lengthening
#14
Anil Bhave, Lior Shabtai, Erik Woelber, Arman Apelyan, Dror Paley, John E Herzenberg
Background and purpose - Femoral lengthening may result in decrease in knee range of motion (ROM) and quadriceps and hamstring muscle weakness. We evaluated preoperative and postoperative knee ROM, hamstring muscle strength, and quadriceps muscle strength in a diverse group of patients undergoing femoral lengthening. We hypothesized that lengthening would not result in a significant change in knee ROM or muscle strength. Patients and methods - This prospective study of 48 patients (mean age 27 (9-60) years) compared ROM and muscle strength before and after femoral lengthening...
November 28, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27891234/normative-values-for-musculoskeletal-and-neuromotor-fitness-in-apparently-healthy-norwegian-adults-and-the-association-with-obesity-a-cross-sectional-study
#15
Ingirid Geirsdatter Heald Kjær, Monica Klungland Torstveit, Elin Kolle, Bjørge Herman Hansen, Sigmund Alfred Anderssen
BACKGROUND: Up-to-date research on musculoskeletal- and neuromotor fitness (MSMF) is lacking. The aims of the present paper were to a) establish normative values of MSMF by gender and age, and b) to assess how much of the variance in MSMF can be explained by obesity in adults. METHODS: A random selection of 726 Norwegians (20-65 years) participated in a national cross-sectional study. Muscular endurance, muscular strength, explosive power, flexibility and balance were assessed in addition to waist circumference (WC)...
2016: BMC Sports Science, Medicine and Rehabilitation
https://www.readbyqxmd.com/read/27884865/running-exposure-is-associated-with-the-risk-of-hamstring-strain-injury-in-elite-australian-footballers
#16
Joshua D Ruddy, Christopher W Pollard, Ryan G Timmins, Morgan D Williams, Anthony J Shield, David A Opar
BACKGROUND: To investigate the association between running exposure and the risk of hamstring strain injury (HSI) in elite Australian footballers. METHODS: Elite Australian footballers (n=220) from 5 different teams participated. Global positioning system (GPS) data were provided for every athlete for each training session and match for the entire 2015 season. The occurrences of HSIs throughout the study period were reported. Receiver operator characteristic curve analyses were performed and the relative risk (RR) of subsequent HSI was calculated for absolute and relative running exposure variables related to distance covered above 10 and 24 km/hour in the preceding week/s...
November 24, 2016: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/27882413/double-bundle-anterior-cruciate-ligament-reconstruction-is-superior-to-single-bundle-reconstruction-in-terms-of-revision-frequency-a-study-of-22-460-patients-from-the-swedish-national-knee-ligament-register
#17
Eleonor Svantesson, David Sundemo, Eric Hamrin Senorski, Eduard Alentorn-Geli, Volker Musahl, Freddie H Fu, Neel Desai, Anders Stålman, Kristian Samuelsson
PURPOSE: Studies comparing single- and double-bundle anterior cruciate ligament (ACL) reconstructions often include a combined analysis of anatomic and non-anatomic techniques. The purpose of this study was to compare the revision rates between single- and double-bundle ACL reconstructions in the Swedish National Knee Ligament Register with regard to surgical variables as determined by the anatomic ACL reconstruction scoring checklist (AARSC). METHODS: Patients from the Swedish National Knee Ligament Register who underwent either single- or double-bundle ACL reconstruction with hamstring tendon autograft during the period 2007-2014 were included...
November 23, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27881383/clinical-and-radiological-outcomes-after-hamstring-anterior-cruciate-ligament-reconstructions-comparison-between-fixed-loop-and-adjustable-loop-cortical-suspension-devices
#18
Nam-Hong Choi, Bong-Seok Yang, Brian N Victoroff
BACKGROUND: Few studies have compared clinical and radiological outcomes after hamstring anterior cruciate ligament (ACL) reconstruction with fixed-loop and adjustable-loop cortical suspension devices. PURPOSE/HYPOTHESIS: The purpose of this retrospective study was to compare clinical outcomes and tunnel widening after hamstring ACL reconstructions with fixed- and adjustable-loop cortical suspension devices. The hypothesis was that compared with femoral graft fixation with the fixed-loop device, fixation with the adjustable-loop device would show similar clinical outcomes and would result in less tunnel widening after hamstring ACL reconstruction...
November 23, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27876265/a-prospective-randomized-comparison-of-two-distinct-allogenic-tissue-constructs-for-anterior-cruciate-ligament-reconstruction
#19
Michael B Rose, Christopher Domes, Mehwish Farooqi, Dennis C Crawford
BACKGROUND: Conduct a prospective randomized study to compare clinical outcomes of anterior cruciate ligament (ACL) reconstruction using quadrupled hamstring tendon (HT) allograft or doubled tibialis anterior (TA) allograft. Limited level 1 data exist comparing outcomes of different soft tissue allograft constructs for ACL reconstruction. We hypothesized no difference would exist in the patient reported outcomes (PRO), arthrometric testing, or rate of re-rupture between the two constructs...
December 2016: Knee
https://www.readbyqxmd.com/read/27871658/rehabilitation-principles-of-the-anterior-cruciate-ligament-reconstructed-knee-twelve-steps-for-successful-progression-and-return-to-play
#20
REVIEW
Kevin E Wilk, Christopher A Arrigo
The rehabilitation process begins immediately after injury to the anterior cruciate ligament (ACL). The goal of preoperative rehabilitation is to prepare the patient for surgery. Current rehabilitation programs focus on strengthening exercises and proprioceptive and neuromuscular control drills to provide a neurologic stimulus. It is also important to address preexisting factors, especially for the female athlete, that may predispose to future injury, such as hip and hamstring weakness. Our goal in the rehabilitation program is to restore full, unrestricted function and to assist the patient to return to 100% of the preinjury level while achieving excellent long-term outcomes...
January 2017: Clinics in Sports Medicine
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