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https://www.readbyqxmd.com/read/29234562/isokinetic-knee-muscle-strength-profile-in-brazilian-male-soccer-futsal-and-beach-soccer-players-a-cross-sectional-study
#1
Claudio A B de Lira, Naryana C Mascarin, Valentine Z Vargas, Rodrigo L Vancini, Marília S Andrade
Background: Anterior cruciate ligament injury is higher in soccer athletes as compared to athletes of other sports. Risk factors for anterior cruciate ligament injury include low knee hamstring/quadriceps strength ratio and bilateral strength deficits. Purpose: To investigate isokinetic thigh muscles strength, hamstring/quadriceps strength ratio, and bilateral strength comparisons in athletes who participate in professional soccer, futsal, and beach soccer. Study Design: Cross-sectional study...
December 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/29233665/eccentric-hamstring-strength-deficit-and-poor-hamstring-to-quadriceps-ratio-are-risk-factors-for-hamstring-strain-injury-in-football-a-prospective-study-of-146-professional-players
#2
Justin W Y Lee, Kam-Ming Mok, Hardaway C K Chan, Patrick S H Yung, Kai-Ming Chan
OBJECTIVES: The purpose of this study was to investigate whether preseason isokinetic strength measures were predictive of future HSI among professional football players. DESIGN: Prospective cohort study, Level of evidence 2. METHODS: A total of 169 professional players participated in a preseason isokinetic strength screening, followed by a 10-month competitive season. Testing protocol included the concentric performance of both knee flexion and extension at 60degs-1 and 240degs-1 and the eccentric performance of the knee flexor at 30degs-1...
December 5, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29219884/abduction-in-proximal-hamstring-tendon-avulsion-injury-mechanism-a-report-on-3-athletes
#3
Anne D van der Made, Rolf W Peters, Claire Verheul, Mario Maas, Gino M Kerkhoffs
Proximal hamstring tendon avulsions are typically sustained during forced hip hyperflexion combined with knee extension. We present 3 cases of athletes with a proximal hamstring tendon avulsion caused by an alternative injury mechanism that also involves a considerable hip abduction component (flexion-abduction injury mechanism). All cases had at least one concurrent injury of the medial thigh muscles, either on the ipsilateral or contralateral side. The 2 elite athletes with this injury mechanism returned to sport at preinjury level relatively quickly...
December 1, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29217532/imaging-detected-acute-muscle-injuries-in-athletes-participating-in-the-rio-de-janeiro-2016-summer-olympic-games
#4
Michel D Crema, Mohamed Jarraya, Lars Engebretsen, Frank W Roemer, Daichi Hayashi, Romulo Domingues, Abdalla Y Skaf, Ali Guermazi
BACKGROUND: Acute muscle injuries in elite athletes are responsible for a large portion of time loss injuries. AIM: To describe the frequency, the anatomic distribution, and severity of imaging-detected acute muscle injuries among athletes who competed in the Rio de Janeiro 2016 Summer Olympics. METHODS: We recorded all sports injuries reported by the National Olympic Committee medical teams and the Organising Committee medical staff during the 2016 Summer Olympics...
December 7, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29216241/discussion-about-different-cut-off-values-of-conventional-hamstring-to-quadriceps-ratio-used-in-hamstring-injury-prediction-among-professional-male-football-players
#5
Monika Grygorowicz, Martyna Michałowska, Tomasz Walczak, Adam Owen, Jakub Krzysztof Grabski, Andrzej Pyda, Tomasz Piontek, Tomasz Kotwicki
OBJECTIVE: To measure the sensitivity and specificity of differences cut-off values for isokinetic Hcon/Qcon ratio in order to improve the capacity to evaluate (retrospectively) the injury of hamstring muscles in professional soccer screened with knee isokinetic tests. DESIGN: Retrospective study. METHODS: Medical and biomechanical data of professional football players playing for the same team for at least one season between 2010 and 2016 were analysed...
2017: PloS One
https://www.readbyqxmd.com/read/29212413/a-lower-extremity-strength-based-profile-of-ncaa-division-i-women-s-basketball-and-gymnastics-athletes-implications-for-knee-joint-injury-risk-assessment
#6
Brennan J Thompson, Curtis S Cazier, Eadric Bressel, Dennis G Dolny
This study aimed to provide a comprehensive strength-based physiological profile of women's NCAA Division I basketball and gymnastic athletes; and to make sport-specific comparisons for various strength characteristics of the knee flexor and extensor muscles. A focus on antagonist muscle balance (hamstrings-to-quadriceps ratios, H:Q) was used to elucidate vulnerabilities in these at-risk female athletes. Fourteen NCAA Division I women's basketball and 13 gymnastics athletes performed strength testing of the knee extensors and flexors...
December 7, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29202784/sprint-and-jump-performance-in-elite-male-soccer-players-following-a-10-week-nordic-hamstring-exercise-protocol-a-randomised-pilot-study
#7
K Krommes, J Petersen, M B Nielsen, P Aagaard, P Hölmich, K Thorborg
OBJECTIVE: The preseason Nordic Hamstring Protocol (NHP) reduces hamstring strain injuries in football players. Despite persisting injury rates, elite clubs are reluctant to apply the NHP often over concerns of negative impacts on performance. This pilot study investigated if sprint or jump-performance outcomes tended to increase or decrease following implementation of the NHP in elite male soccer-players. RESULTS: Nineteen male soccer players from the Danish 1st division were randomised to perform NHP (27 sessions) during pre-season, or to control group (CG)...
December 4, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29201925/a-comparison-of-nonoperative-and-operative-treatment-of-complete-proximal-hamstring-ruptures
#8
Braidy C Shambaugh, Joshua R Olsen, Edward Lacerte, Ethan Kellum, Suzanne L Miller
Background: The early repair of acute proximal hamstring ruptures provides better clinical results than delayed repair. However, it is unclear how nonoperative treatment compares with the operative treatment of these injuries. Purpose: To compare the clinical results of the nonoperative and operative treatment of acute proximal hamstring ruptures. Study Design: Cohort study; Level of evidence, 3. Methods: A total of 25 patients with complete, retracted proximal hamstring ruptures presenting to 1 institution were retrospectively reviewed...
November 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29201295/a-comparative-study-of-clinical-outcomes-and-second-look-arthroscopic-findings-between-remnant-preserving-tibialis-tendon-allograft-and-hamstring-tendon-autograft-in-anterior-cruciate-ligament-reconstruction-matched-pair-design
#9
You Keun Kim, Jong Hyun Ahn, Jae Doo Yoo
Background: This study aimed to compare stability, functional outcome, and second-look arthroscopic findings after anterior cruciate ligament reconstruction between remnant-preserving tibialis tendon allograft and remnant-sacrificing hamstring tendon autograft. Methods: We matched two groups (remnant-preserving tibialis tendon allograft group and hamstring tendon autograft group) in terms of demographic characteristics, associated injury, and knee characteristics...
December 2017: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/29187349/isokinetic-strength-assessment-offers-limited-predictive-validity-for-detecting-risk-of-future-hamstring-strain-in-sport-a-systematic-review-and-meta-analysis
#10
REVIEW
Brady Green, Matthew N Bourne, Tania Pizzari
OBJECTIVE: To examine the value of isokinetic strength assessment for predicting risk of hamstring strain injury, and to direct future research into hamstring strain injuries. DESIGN: Systematic review. DATA SOURCES: Database searches for Medline, CINAHL, Embase, AMED, AUSPORT, SPORTDiscus, PEDro and Cochrane Library from inception to April 2017. Manual reference checks, ahead-of-press and citation tracking. ELIGIBILITY CRITERIA FOR SELECTING STUDIES: Prospective studies evaluating isokinetic hamstrings, quadriceps and hip extensor strength testing as a risk factor for occurrence of hamstring muscle strain...
November 29, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29181559/compensation-after-treatment-for-anterior-cruciate-ligament-injuries-a-review-of-compensation-claims-in-norway-from-2005-to-2015
#11
Per-Henrik Randsborg, Ida Rashida Kahn Bukholm, Rune Bruhn Jakobsen
PURPOSE: To assess the most common reasons for complaints following anterior cruciate ligament (ACL) injuries reported to the Norwegian System of Patient Injury Compensation (NPE), and to view these complaints in light of the ACL reconstructions (ACL-Rs) reported to the Norwegian Knee Ligament Registry (NKLR). METHOD: Data from the NPE and the NKLR were collected for the study period (2005-2015). The age and gender and type of complaint and reason for granted compensation were collected from the NPE, while the graft choice and total number of ACL-R were collected from the NKLR...
November 27, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29181250/the-efficacy-of-angle-matched-isokinetic-knee-flexor-and-extensor-strength-parameters-in-predicting-agility-test-performance
#12
Matt Greig, James Naylor
Background: Agility is a fundamental performance element in many sports, but poses a high risk of injury. Hierarchical modelling has shown that eccentric hamstring strength is the primary determinant of agility performance. Purpose: The purpose of this study was to investigate the relationship between knee flexor and extensor strength parameters and a battery of agility tests. Study Design: Controlled laboratory study. Methods: Nineteen recreational intermittent games players completed an agility battery and isokinetic testing of the eccentric knee flexors (eccH) and concentric knee extensors (conQ) at 60, 180 and 300°·s-1...
October 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/29177074/prognostic-factors-for-specific-lower-extremity-and-spinal-musculoskeletal-injuries-identified-through-medical-screening-and-training-load-monitoring-in-professional-football-soccer-a-systematic-review
#13
Tom Hughes, Jamie C Sergeant, Matthew J Parkes, Michael J Callaghan
Background: Medical screening and load monitoring procedures are commonly used in professional football to assess factors perceived to be associated with injury. Objectives: To identify prognostic factors (PFs) and models for lower extremity and spinal musculoskeletal injuries in professional/elite football players from medical screening and training load monitoring processes. Methods: The MEDLINE, AMED, EMBASE, CINAHL Plus, SPORTDiscus and PubMed electronic bibliographic databases were searched (from inception to January 2017)...
2017: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29175719/does-chronic-ankle-instability-influence-lower-extremity-muscle-activation-of-females-during-landing
#14
Yumeng Li, Jupil Ko, Marika A Walker, Cathleen N Brown, Julianne D Schmidt, Seock-Ho Kim, Kathy J Simpson
Much remains unclear about how chronic ankle instability (CAI) could affect knee muscle activations and interact with knee biomechanics. Therefore, the purpose of this study was to assess the influence of CAI on the lower extremity muscle activation at the ankle and knee joints during landings on a tilted surface. A surface electromyography system and two force plates were used to collect lower extremity muscle activation of 21 young female individuals with CAI and 21 pair-matched controls during a double-leg landing with test limb landing on the tilted surface...
November 22, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29169096/neuromuscular-compensatory-strategies-at-the-trunk-and-lower-limb-are-not-resolved-following-an-acl-reconstruction
#15
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...
November 13, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29164130/comparison-of-an-innovative-rehabilitation-combining-reduced-conventional-rehabilitation-with-balneotherapy-and-a-conventional-rehabilitation-after-anterior-cruciate-ligament-reconstruction-in-athletes
#16
Laetitia Peultier-Celli, Didier Mainard, Frank Wein, Nicolas Paris, Patrick Boisseau, Alexandre Ferry, René Gueguen, Isabelle Chary-Valckenaere, Jean Paysant, Philippe Perrin
Background: Instability of the knee, related to anterior cruciate ligament injury, is treated by surgical reconstruction. During recovery, a loss of proprioceptive input can have a significant impact. Few studies have evaluated the benefits of rehabilitation of the knee in aquatic environment on functional outcomes. Objective: This study aimed to compare an innovative rehabilitation protocol combining reduced conventional rehabilitation with aquatic rehabilitation, with a conventional rehabilitation, according to the National French Health Authority, in terms of kinetics, development of proprioceptive skills, and functional improvement of the knee...
2017: Frontiers in Surgery
https://www.readbyqxmd.com/read/29161747/a-functional-mri-exploration-of-hamstring-activation-during-the-supine-bridge-exercise
#17
Matthew Bourne, Morgan Williams, Tania Pizzari, Anthony Shield
The single leg supine bridge (SLB) is a commonly employed strengthening exercise and is used as a clinical test for hamstring function in sports, however, little is known about the patterns of muscle activation in this task. To explore these activation patterns, nine healthy, recreationally active males underwent functional magnetic resonance imaging (fMRI) of their thighs at rest and immediately after 5 sets of 10 repetitions of the SLB exercise. Exercise-induced increases in the transverse (T2) relaxation time of the biceps femoris long and short heads, semitendinosus and semimembranosus, were determined via signal intensity changes in pre- and post-exercise images and used as an index of muscle activation...
November 21, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29159673/double-bundle-anterior-cruciate-ligament-reconstruction-is-better-than-single-bundle-reconstruction-in-terms-of-objective-assessment-but-not-in-terms-of-subjective-score
#18
Faisal Ahmed Hashem El-Sherief, Wael Abdelkarim Aldahshan, Yaser Elsayed Wahd, Ashraf Mohamed Abdelaziz, Hany Abdel Gawwad Soliman, Tohamy Goda Hassan, Hassan Fathy Elbehairy, Adel Hamed Awadallah
PURPOSE: A comparison of clinical outcomes between double-bundle (DB) and single-bundle (SB) anterior cruciate ligament (ACL) reconstruction for patients with ACL injury. METHODS: Sixty patients were treated with either SB (n = 30) or DB (n = 30) ACL reconstruction between 2011 and 2012. The hamstring tendons were autografted with suspensory fixation on the femoral side, while a bio-absorbable interference screw was used for fixation on the tibial side. These patients were evaluated using Lysholm score, International Knee Documentation Committee (IKDC) forms (both objective and subjective), Lachman test, pivot shift test, and KT 1000 arthrometer...
November 20, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29156302/monitoring-the-effect-of-football-match-congestion-on-hamstring-strength-and-lower-limb-flexibility-potential-for-secondary-injury-prevention
#19
Martin Wollin, Kristian Thorborg, Tania Pizzari
OBJECTIVES: To investigate the effect of competitive football match congestion on hamstring strength and lower limb flexibility. DESIGN: Repeated measures. SETTING: Elite male youth football. PARTICIPANTS: Fifteen male elite youth football players from the national football association centre of excellence were included (age = 15.81 ±0.65 years, height = 171.95 ±6.89 cm, weight = 65.93 ±7.53 kg). MAIN OUTCOME MEASURES: Hamstring strength and pain, ankle dorsiflexion, hip extension, knee extension and flexion range of motion...
September 15, 2017: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29150270/m-biceps-femoris-a-wolf-in-sheep-s-clothing-the-downside-of-a-lower-limb-injury-prevention-training
#20
Thomas Ertelt, Thomas Gronwald
Both, hamstring and ACL injuries are among the most typical injuries, particularly in change of direction and high speed running sports. They're also difficult to treat. Therefore, in the past few years, sports medicine practitioners and exercise scientists have mainly been focusing on the development and implementation of preventive programs in order to reduce the number of lower limb injuries, mainly by improving knee alignment. A number of studies have been able to prove the success of these training interventions, which are mainly addressing sensorimotor abilities and plyometric activities...
November 2017: Medical Hypotheses
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