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Hamstring eccentrics

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https://www.readbyqxmd.com/read/27790051/astym-therapy-improves-bilateral-hamstring-flexibility-and-achilles-tendinopathy-in-a-child-with-cerebral-palsy-a-retrospective-case-report
#1
Nicole A Scheer, Lucas R Alstat, Robert S Van Zant
PURPOSE: The purpose of this case report was to describe the use of Astym therapy to improve hamstring flexibility and Achilles tendinopathy in a child with cerebral palsy. CASE DESCRIPTION: An eight-year-old female with cerebral palsy was referred to physical therapy for the treatment of bilateral hamstring inflexibility and Achilles tendinopathy. Treatment focused on an Astym therapy protocol of eccentric exercise, stretching, active and passive range of motion, gait training, and a home exercise program...
2016: Clinical Medicine Insights. Case Reports
https://www.readbyqxmd.com/read/27752982/effect-of-injury-prevention-programs-that-include-the-nordic-hamstring-exercise-on-hamstring-injury-rates-in-soccer-players-a-systematic-review-and-meta-analysis
#2
Wesam Saleh A Al Attar, Najeebullah Soomro, Peter J Sinclair, Evangelos Pappas, Ross H Sanders
BACKGROUND: Hamstring injuries are among the most common non-contact injuries in sports. The Nordic hamstring (NH) exercise has been shown to decrease risk by increasing eccentric hamstring strength. OBJECTIVE: The purpose of this systematic review and meta-analysis was to investigate the effectiveness of the injury prevention programs that included the NH exercise on reducing hamstring injury rates while factoring in athlete workload. METHODS: Two researchers independently searched for eligible studies using the following databases: the Cochrane Central Register of Controlled Trials via OvidSP, AMED (Allied and Complementary Medicine) via OvidSP, EMBASE, PubMed, MEDLINE, SPORTDiscus, Web of Science, CINAHL and AusSportMed, from inception to December 2015...
October 17, 2016: Sports Medicine
https://www.readbyqxmd.com/read/27747841/the-efficacy-of-exercise-in-preventing-injury-in-adult-male-football-a-systematic-review-of-randomised-controlled-trials
#3
Tom Porter, Alison Rushton
BACKGROUND: Injury prevention measures might reduce the impact of injury on footballers and football clubs. Increasing research has evaluated the use of exercise for injury prevention. However, research has focused on adolescent females. No high-quality systematic reviews have evaluated the efficacy of all forms of exercise on preventing injury in adult male football. OBJECTIVE: Our objective was to conduct a systematic review to evaluate the efficacy of exercise in preventing injury in adult male football...
December 2015: Sports Medicine—Open
https://www.readbyqxmd.com/read/27739112/the-functional-significance-of-hamstrings-composition-is-it-really-a-fast-muscle-group
#4
Pavlos E Evangelidis, Garry J Massey, Richard A Ferguson, Patrick C Wheeler, Matthew T G Pain, Jonathan P Folland
Hamstrings muscle fiber composition may be predominantly fast-twitch and could explain the high incidence of hamstrings strain injuries. However, hamstrings muscle composition in vivo, and its influence on knee flexor muscle function, remains unknown. We investigated biceps femoris long head (BFlh) myosin heavy chain (MHC) composition from biopsy samples, and the association of hamstrings composition and hamstrings muscle volume (using MRI) with knee flexor maximal and explosive strength. Thirty-one young men performed maximal (concentric, eccentric, isometric) and explosive (isometric) contractions...
October 13, 2016: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/27676874/athletic-injury-prevention-determinants-of-sprint-performance
#5
Pascal Edouard, Pierrick Arnal, Philippe Gimenez, Pierre Samozino, Pedro Jimenez-Reyes, Matt Brughelli, Jurdan Mendiguchia, Jean-Benoit Morin
OBJECTIVE: The hamstring muscles are the most injured muscles in athletes practicing sprints. However, they seem greatly contributing to the production of horizontal force, a key element in the sprint acceleration performance. The aim of our study was to experimentally analyse the link between the production of horizontal force and strength of the hamstrings at maximum sprints on a treadmill and in fatigue conditions. PATIENTS AND METHODS: Fourteen male subjects accustomed to sprint participated in the experiment consisting in 12 6-seconds sprints separated by 44seconds of recovery on an instrumented treadmill sprint for measuring the horizontal force, coupled with the simultaneous recording of the EMG activity of the vastus lateralis, rectus biceps femoris and gluteus muscles...
September 2016: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27676856/an-injury-prevention-program-is-able-to-reduce-the-number-of-injury-complaints-at-medium-term-in-athletics
#6
Pascal Edouard, Emmanuelle Cugy, Romain Dolin, Nicolas Morel, Kathrin Steffen
OBJECTIVE: The incidence of injuries in athletics is important, with consequences at short and long terms in sport, health, social and professional levels. It is therefore important to define strategies to reduce the incidence and severity of injuries in athletics. The objective of this study was to determine whether an injury prevention program (IPP) can reduce the occurrence and/or severity of injuries related to the practice of athletics. MATERIAL AND METHODS: The IPP has been developed, based on current scientific knowledge, targeting exercises on the most common injuries in athletics (hamstring muscle injury, Achilles and patellar tendinopathy, low back pain, ankle sprain) and selecting exercises known to treat and/or prevent these injuries (care stability, hamstrings and leg eccentric muscle strengthening, pelvis balance and stabilizing work)...
September 2016: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27676831/interest-of-isokinetic-in-the-rehabilitation-of-the-knee-in-hemiplegic
#7
Laila Mahir, Karima Belhaj, Siham Zahi, Fatima Lmidmani, Abdellatif El Fatimi
OBJECTIVE: The isokinetic is a means of objective and reproducible assessment of muscle strength, it is widely used in rehabilitation especially joint and muscle pathology. There is little applied to the neurological disease. To report the experience of our rehabilitation field service isokinetic knee of hemiplegic through three observations. OBSERVATIONS: Observation 1: 65 years old patient, who suffered an ischemic stroke right for 2 years, who presented a quadriceps spasticity 2, walking with a cane, he received isokinetic knee rehabilitation for a year, with exercises concentric, eccentric and proprioceptive...
September 2016: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27632842/rehabilitation-after-hamstring-strain-injury-emphasizing-eccentric-strengthening-at-long-muscle-lengths-results-of-long-term-follow-up
#8
Timothy F Tyler, Brandon M Schmitt, Stephen J Nicholas, Malachy McHugh
CONTEXT: Hamstring strain injuries have a high recurrence rate. OBJECTIVE: To determine if a protocol emphasizing eccentric strength training with the hamstrings in a lengthened position resulted in a low recurrence rate. DESIGN: Longitudinal cohort study Setting: Sports medicine physical therapy clinic. PARTICIPANTS: 50 athletes with hamstring strain injury (age 36±16 yo; 30 men, 20 women; 3 G1, 43 G2, 4 G3; 25 recurrent injuries) followed a 3-phase rehabilitation protocol emphasizing eccentric strengthening with the hamstrings in a lengthened position...
August 24, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27632822/eccentric-exercises-reduce-hamstring-strains-in-elite-adult-male-soccer-players-a-critically-appraised-topic
#9
Ian B Shadle, Paul A Cacolice
No abstract text is available yet for this article.
August 24, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27536252/hamstring-architectural-and-functional-adaptations-following-long-vs-short-muscle-length-eccentric-training
#10
Kenny Guex, Francis Degache, Cynthia Morisod, Matthieu Sailly, Gregoire P Millet
Most common preventive eccentric-based exercises, such as Nordic hamstring do not include any hip flexion. So, the elongation stress reached is lower than during the late swing phase of sprinting. The aim of this study was to assess the evolution of hamstring architectural (fascicle length and pennation angle) and functional (concentric and eccentric optimum angles and concentric and eccentric peak torques) parameters following a 3-week eccentric resistance program performed at long (LML) vs. short muscle length (SML)...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27467517/effects-of-a-10-week-nordic-hamstring-exercise-and-russian-belt-training-on-posterior-lower-limb-muscle-strength-in-elite-junior-soccer-players
#11
Ezequiel Rey, Álvaro Paz-Domínguez, David Porcel-Almendral, Víctor Paredes-Hernández, Roberto Barcala-Furelos, Cristian Abelairas-Gómez
The purpose of this study was to assess the effect of two eccentric hamstring training exercises, Nordic hamstring (NHE) and Russian belt (RB), on lower limb strength and bilateral asymmetry using the Single Leg Hamstring Bridge (SLHB) test. Forty-seven elite junior soccer players (age 17.7±0.5 years, height 175.3±3.6 cm, body mass 68.1±7.4 kg) were randomized into one of three groups, the NHE group (n= 16), RB group (n= 15), or the control group (CG) (n= 16). The eccentric training intervention consisted of 27 supervised training sessions over 10 weeks...
July 26, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27467123/impact-of-exercise-selection-on-hamstring-muscle-activation
#12
Matthew N Bourne, Morgan D Williams, David A Opar, Aiman Al Najjar, Graham K Kerr, Anthony J Shield
OBJECTIVE: To determine which strength training exercises selectively activate the biceps femoris long head (BFLongHead) muscle. METHODS: We recruited 24 recreationally active men for this two-part observational study. Part 1: We explored the amplitudes and the ratios of lateral (BF) to medial hamstring (MH) normalised electromyography (nEMG) during the concentric and eccentric phases of 10 common strength training exercises. Part 2: We used functional MRI (fMRI) to determine the spatial patterns of hamstring activation during two exercises which (1) most selectively and (2) least selectively activated the BF in part 1...
May 13, 2016: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/27396361/recovery-from-exercise-induced-muscle-damage-cold-water-immersion-versus-whole-body-cryotherapy
#13
Abd-Elbasset Abaïdia, Julien Lamblin, Barthélémy Delecroix, Cédric Leduc, Alan McCall, Mathieu Nédélec, Brian Dawson, Georges Baquet, Grégory Dupont
PURPOSE: The aim of this study was to compare the effects of cold-water immersion and whole-body cryotherapy on recovery kinetics following exercise induced muscle damage. METHODS: Ten physically active men performed single-leg hamstring eccentric exercise comprising 5 sets of 15 repetitions. Immediately post-exercise, subjects were exposed in a randomized cross-over design to cold-water immersion (10 minutes at 10°C) or whole-body cryotherapy (3 minutes at -110°C) recovery...
July 11, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27331039/prediction-of-hamstring-injury-in-professional-soccer-players-by-isokinetic-measurements
#14
Marc Dauty, Pierre Menu, Alban Fouasson-Chailloux, Sophie Ferréol, Charles Dubois
OBJECTIVES: previous studies investigating the ability of isokinetic strength ratios to predict hamstring injuries in soccer players have reported conflicting results. HYPOTHESIS: to determine if isokinetic ratios are able to predict hamstring injury occurring during the season in professional soccer players. STUDY DESIGN: case-control study; LEVEL OF EVIDENCE: 3. METHODS: from 2001 to 2011, 350 isokinetic tests were performed in 136 professional soccer players at the beginning of the soccer season...
January 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/27300635/eccentric-exercises-reduce-hamstring-strains-in-elite-adult-male-soccer-players-a-critically-appraised-topic
#15
Ian B Shadle, Paul A Cacolice
Hamstring strains are a common sport-related injury, which may limit athletic performance for an extended period of time. These injuries are common in the soccer setting.1 As such, it is important to determine an appropriate prevention program to minimize the risk of such an injury for these athletes. Hamstring strains occur when external loads exceed the strength of the tissue. Development of eccentric muscle control has been shown to be an effective and inexpensive intervention to improve strength. Eccentric hamstring training then, may provide an effective and practical hamstring strain prevention strategy...
June 14, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27267402/acute-neuromuscular-and-performance-responses-to-nordic-hamstring-exercises-completed-before-or-after-football-training
#16
Ric Lovell, Jason C Siegler, Michael Knox, Scott Brennan, Paul W M Marshall
The optimal scheduling of Nordic Hamstring exercises (NHEs) relative to football training sessions is unknown. We examined the acute neuromuscular and performance responses to NHE undertaken either before (BT) or after (AT) simulated football training. Twelve amateur players performed six sets of five repetitions of the NHE either before or after 60 min of standardised football-specific exercise (SAFT(60)). Surface electromyography signals (EMG) of the hamstring muscles were recorded during both the NHE, and maximum eccentric actions of the knee flexors (0...
June 6, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27227793/effects-of-a-strength-training-session-after-an-exercise-inducing-muscle-damage-on-recovery-kinetics
#17
Abd-Elbasset Abaïdia, Barthélémy Delecroix, Cédric Leduc, Julien Lamblin, Alan McCall, Georges Baquet, Grégory Dupont
The purpose of this study was to investigate the effects an upper-limb strength training session the day after an exercise inducing muscle damage, on recovery of performance. In a randomized crossover design, subjects performed the day after the exercise, on two separate occasions (passive versus active recovery conditions) a single-leg exercise (dominant in one condition and non-dominant in the other condition) consisting of 5 sets of 15 eccentric contractions of the knee flexors. Active recovery consisted of performing an upper-body strength training session the day after the exercise...
May 23, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27214243/the-dynamic-control-ratio-at-the-equilibrium-point-dcre-introducing-relative-and-absolute-reliability-scores
#18
Tobias Alt, Axel J Knicker, Heiko K Strüder
Analytical methods to assess thigh muscle balance need to provide reliable data to allow meaningful interpretation. However, reproducibility of the dynamic control ratio at the equilibrium point has not been evaluated yet. Therefore, the aim of this study was to compare relative and absolute reliability indices of its angle and moment values with conventional and functional hamstring-quadriceps ratios. Furthermore, effects of familiarisation and angular velocity on reproducibility were analysed. A number of 33 male volunteers participated in 3 identical test sessions...
May 23, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27184883/correlation-between-quadriceps-to-hamstring-ratio-and-functional-outcomes-in-patellofemoral-pain
#19
Hande Guney, Inci Yuksel, Defne Kaya, Mahmut Nedim Doral
BACKGROUND: The aim of this study was to investigate the correlation between quadriceps to hamstring (Q:H) ratio and the functional outcomes in Patellofemoral Pain (PFP) patients. METHODS: The study included forty-four women diagnosed with unilateral PFP. Eccentric and concentric quadriceps and hamstring strength were recorded. Conventional Q:H ratio was calculated as the concentric quadriceps to concentric hamstring peak torque (Ratio 1). Functional ratios were calculated as the eccentric quadriceps to concentric hamstring peak torque (Ratio 2) and as the concentric quadriceps to eccentric hamstring torque (Ratio 3)...
August 2016: Knee
https://www.readbyqxmd.com/read/27172083/hamstring-injuries-in-the-athlete-diagnosis-treatment-and-return-to-play
#20
Samuel K Chu, Monica E Rho
Hamstring injuries are very common in athletes. Acute hamstring strains can occur with high-speed running or with excessive hamstring lengthening. Athletes with proximal hamstring tendinopathy often do not report a specific inciting event; instead, they develop the pathology from chronic overuse. A thorough history and physical examination is important to determine the appropriate diagnosis and rule out other causes of posterior thigh pain. Conservative management of hamstring strains involves a rehabilitation protocol that gradually increases intensity and range of motion, and progresses to sport-specific and neuromuscular control exercises...
May 2016: Current Sports Medicine Reports
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