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Hamstring injuries

Arnhild Bakken, Stephen Targett, Tone Bere, Cristiano Eirale, Abdulaziz Farooq, Andrea B Mosler, Johannes L Tol, Rod Whiteley, Karim M Khan, Roald Bahr
BACKGROUND: Lower extremity muscle strength tests are commonly used to screen for injury risk in professional soccer. However, there is limited evidence on the ability of such tests in predicting future injuries. PURPOSE: To examine the association between hip and thigh muscle strength and the risk of lower extremity injuries in professional male soccer players. STUDY DESIGN: Case-control study; Level of evidence, 3. METHODS: Professional male soccer players from 14 teams in Qatar underwent a comprehensive strength assessment at the beginning of the 2013/2014 and 2014/2015 seasons...
March 1, 2018: American Journal of Sports Medicine
Edward P Washabaugh, Chandramouli Krishnan
BACKGROUND: Robotic-resisted treadmill walking is a form of task-specific training that has been used to improve gait function in individuals with neurological injury, such as stroke, spinal cord injury, or cerebral palsy. Traditionally, these devices use active elements (e.g., motors or actuators) to provide resistance during walking, making them bulky, expensive, and less suitable for overground or in-home rehabilitation. We recently developed a low-cost, wearable robotic brace that generates resistive torques across the knee joint using a simple magnetic brake...
2018: Restorative Neurology and Neuroscience
Ioannis Karikis, Martina Åhlén, Ninni Sernert, Lars Ejerhed, Lars Rostgård-Christensen, Jüri Kartus
PURPOSE: To compare long-term clinical and radiographic outcomes in patients undergoing either early (group A) or late (group B) surgery after anterior cruciate ligament (ACL) injury. METHODS: ACL reconstruction using hamstring tendon autografts was performed in 30 patients in group A (median age, 23 years; range, 17-49 years) and 31 patients in group B (median age, 27 years; range, 17-38 years). The patients in group A were operated on within 5 months (median, 3 months; range, 2-5 months) of injury, whereas those in group B were operated on more than 24 months (median, 30 months; range, 24-48 months) after injury...
March 6, 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
Matthew L Benn, Tania Pizzari, Leanne Rath, Kylie Tucker, Adam I Semciw
INTRODUCTION: Cadaveric studies indicate that adductor magnus is structurally partitioned into at least two regions. The aim of this study was to investigate the direction-specific actions of proximal and distal portions of adductor magnus, and in doing so determine if these segments have distinct functional roles. MATERIALS AND METHODS: Fine-wire EMG electrodes were inserted into two portions of adductor magnus of twelve healthy young adults. Muscle activity was recorded during maximum voluntary isometric contractions (MVICs) across eight tests (hip flexion/extension, internal/external rotation, abduction, and adduction at 0°, 45° and 90° hip flexion)...
March 9, 2018: Clinical Anatomy
Matheus Oliveira Almeida, Chris G Maher, Bruno T Saragiotto
No abstract text is available yet for this article.
March 7, 2018: British Journal of Sports Medicine
Thomas Bartels, Kay Brehme, Martin Pyschik, Stephan Schulze, Karl-Stefan Delank, Georg Fieseler, Kevin G Laudner, Souhail Hermassi, René Schwesig
There are currently no longitudinal data describing the pre- and postoperative postural regulation and stability of patients with anterior cruciate ligament (ACL) damage. Therefore, the aim of this study was to evaluate postural regulation and stability prior to and during rehabilitation following surgery of the ACL. Fifty-four physically active subjects (age: 30.5±10.9 years, 29 male subjects) were examined with the Interactive Balance System pre-, 6, and at 12 weeks following surgical reconstruction of the ACL using a hamstring tendon graft...
February 2018: Journal of Exercise Rehabilitation
Melissa A Christino, Frances A Tepolt, Dai Sugimoto, Lyle J Micheli, Mininder S Kocher
BACKGROUND: Revision anterior cruciate ligament (ACL) reconstruction in pediatric patients has not been well studied. The purpose of this study was to assess the demographics, technique, and results of ACL revision surgery in children and adolescents. METHODS: This was a retrospective case series with outcomes assessment of patients 18 years old and younger who underwent revision ACL surgery over a 16-year period at a single institution. Medical records were reviewed for demographics, clinical and operative data, and patients were contacted for outcomes at a minimum of 1 year after revision surgery...
March 5, 2018: Journal of Pediatric Orthopedics
Kerry Peek, Don Gatherer, Kyle J M Bennett, Job Fransen, Mark Watsford
The objective of this study was to investigate knee muscle strength characteristics in players from a high-level youth football Academy. In total, 110 players (aged 8-15 years) underwent muscle strength assessments carried out by a research physiotherapist using a computer-linked hand-held dynamometer. Results indicated that isometric hamstrings and quadriceps strength increased with age, whereas the isometric hamstring to quadriceps (H/Q) ratio decreased with age. A number of youth football players (n = 20; 18%; 95% CI: 11-27%) demonstrated isometric H/Q ratios of less than 0...
March 5, 2018: Research in Sports Medicine
Paula C Charlton, Benjamin Raysmith, Martin Wollin, Simon Rice, Craig Purdam, Ross A Clark, Michael K Drew
OBJECTIVES: To evaluate strength and flexibility measures pre- and post- Australian Football (AF) competition to determine their potential utility as secondary prevention measures. DESIGN: Cohort study. SETTING: Semi-professional AF club. PARTICIPANTS: Ten male AF athletes (mean ± SD; age, 21.3 ± 2.2 years; height, 186.1 ± 6.3 cm; weight, 83.5 ± 8.6 kg). MAIN OUTCOME MEASURES: Maximal unilateral isometric knee flexion strength performed in 45 degrees of hip flexion and 30 degrees of knee flexion, flexibility measures of hip and knee extension and ankle dorsiflexion...
February 2, 2018: Physical Therapy in Sport
Mark Roe, Shane Malone, Eamonn Delahunt, Kieran Collins, Conor Gissane, Ulrik McCarthy Persson, John C Murphy, Catherine Blake
OBJECTIVE: Report eccentric knee flexor strength values of elite Gaelic football players from underage to adult level whilst examining the influence of body mass and previous hamstring injury. DESIGN: Cross-sectional study. SETTING: Team's training facility. PARTICIPANTS: Elite Gaelic football players (n = 341) from under 14 years to senior age-grades were recruited from twelve teams. MAIN OUTCOME MEASURES: Absolute (N) and relative (N·kg-1 ) eccentric hamstring strength as well as corresponding between-limb imbalances (%) were calculated for all players...
March 1, 2018: Physical Therapy in Sport
Nikolaos Malliaropoulos, Georgios Bikos, Maria Meke, Korakakis Vasileios, Xavier Valle, Heinz Lohrer, Nicola Maffulli, Nat Padhiar
Background: Inversion injury to the ankle and hamstring injuries are common problems in most sports. It is not known whether these injuries constitute a predisposing factor or a precursor of injury or re-injury of these anatomical locations. Therefore, we wished to test the hypothesis that a previous inversion ankle injury exerted a significant effect on the chance of an athlete suffering from a subsequent ipsilateral hamstring injury and vice versa. Methods: In an observational cohort study over 17 years (1998-2015), 367 elite track and field athletes, were grouped according to their first traumatic isolated ankle or hamstring injury...
2018: Journal of Foot and Ankle Research
Ben Macdonald, John O'Neill, Noel Pollock, Bas Van Hooren
Poor hamstring strength-endurance is a risk factor for hamstring injuries. This study investigated the effectiveness of the single-leg Roman hold and Nordic hamstring curl in improving hamstring strength-endurance. Twelve Gaelic footballers (mean ± standard deviation age, height and mass were 25.17 ± 3.46 years, 179.25 ± 5.88 cm, 85.75 ± 4.75 kilo) with a history of hamstring injury were randomized into 2 groups that performed 6 weeks of either Nordic hamstring curl, or single-leg Roman chair hold training...
February 27, 2018: Journal of Strength and Conditioning Research
Antonio Cusano, Nicholas Pagani, Xinning Li
Medial scapular winging is often due to dysfunction of the serratus anterior muscle as a result of injury to the long thoracic nerve. Impairment of the serratus anterior muscle may cause uncoordinated scapulohumeral rhythm during shoulder elevation and subsequent subscapular or shoulder pain, subacromial impingement, and glenohumeral joint instability. Although long thoracic nerve injury typically resolves in 12 to 18 months after a physical therapy regimen, surgical intervention is indicated in patients who fail conservative management...
August 2017: Arthroscopy Techniques
Mark De Ste Croix, Abigail Priestley, Rhodri Lloyd, Jon Oliver
PURPOSE: Fatigue negatively alters dynamic knee control, and the functional hamstring/quadriceps ratio (H/QFUNC ) plays an important role in stabilizing the joint. The aim of this study was to investigate the influence of soccer-specific exercise on H/QFUNC in under (U) 13-, U15-, and U17-year-old female soccer players. METHODS: A total of 36 female players performed concentric and eccentric actions of the hamstrings at 60°, 120°, and 180°/s before and after an age group-specific field-based soccer protocol...
February 27, 2018: Pediatric Exercise Science
Renan F H Nunes, Rodolfo A Dellagrana, Fábio Y Nakamura, Cosme F Buzzachera, Flavia A M Almeida, Lucinar J F Flores, Luiz G A Guglielmo, Sérgio G da Silva
Purpose/Background: Strength asymmetries are related to knee injuries in intermittent sports players. The purpose of this study was to examine whether elite futsal players demonstrate strength asymmetries during knee isokinetic testing applying the Croisier et al.21 criteria. Methods: Forty male elite (27.9 ± 6.5 years) Brazilian futsal players participated in the study. The testing protocol required players to perform concentric contractions of both quadriceps and hamstring muscles at angular velocities of 60 °·s-1 and 240 °·s-1 and eccentric contractions of hamstring at 30 °·s-1 and 120 °·s-1 ...
February 2018: International Journal of Sports Physical Therapy
Lasse Lempainen, Jussi Kosola, Ricard Pruna, Jordi Puigdellivol, Janne Sarimo, Pekka Niemi, Sakari Orava
Background: As compared with injuries involving muscle only, those involving the central hamstring tendon have a worse prognosis. Limited information is available regarding the surgical treatment of central tendon injuries of the hamstrings. Purpose: To describe the operative treatment and outcomes of central tendon injuries of the hamstrings among athletes. Study Design: Case series; Level of evidence, 4. Methods: Eight athletes (6 top level, 2 recreational) with central hamstring tendon injuries underwent magnetic resonance imaging and surgical treatment...
February 2018: Orthopaedic Journal of Sports Medicine
Dai Sugimoto, Benton E Heyworth, Jeffery J Brodeur, Dennis E Kramer, Mininder S Kocher, Lyle J Micheli
CONTEXT: Recent epidemiology studies indicated a steady increase of anterior cruciate ligament (ACL) injury in young athletes. ACL reconstruction (ACLR) is currently a standard of the care, but effect of ACLR graft including bone patellar tendon bone (BTB), hamstring tendon (HT), or iliotibial band (ITB) on balance and hop performance is understudied. OBJECTIVE: To compare balance and hop deficits between uninvolved and reconstructed limbs in each autograft type (aim 1) and among the three autograft groups (aim 2)...
February 21, 2018: Journal of Sport Rehabilitation
Arnlaug Wangensteen, Ali Guermazi, Johannes L Tol, Frank W Roemer, Bruce Hamilton, Juan-Manuel Alonso, Rodney Whiteley, Roald Bahr
OBJECTIVES: To determine agreement between modified Peetrons, Chan acute muscle strain injury classification and British Athletics Muscle Injury Classification (BAMIC) and to investigate their associations and ability to predict time to return to sport (RTS). METHODS: Male athletes (n=176) with acute hamstring injury and MRI (1.5T) ≤5 days were followed until RTS. MRIs were scored using standardised forms. RESULTS: For MRI-positive injuries there was moderate agreement in severity grading (κ = 0...
February 19, 2018: European Radiology
Rimtautas Gudas, Rokas Jurkonis, Alfredas Smailys
BACKGROUND The aim of this study was to evaluate the reconstruction of a torn anterior cruciate ligament (ACL) with 10 mm diameter BPTB (bone-patellar tendon-bone) autograft versus 8 mm HT (hamstring tendon) autografts, to compare the ability to restore pre-injury sports activities and reduce revision risk after these procedures. MATERIAL AND METHODS A prospective clinical review was performed to compare results of patients who underwent primary anatomical ACLR with 10 mm BPTB autografts with patients who underwent 8 mm diameter HT autografts, between January 2011 and January 2014...
February 17, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
Matthew N Bourne, David Pope, Steven J Duhig, Ryan G Timmins, Morgan D Williams, Aiman Al Najjar, Graham K Kerr, Anthony J Shield
No abstract text is available yet for this article.
February 15, 2018: British Journal of Sports Medicine
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