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Nordic hamstring

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https://www.readbyqxmd.com/read/28544170/hamstring-injury-prevention-in-soccer-before-or-after-training
#1
Ric Lovell, Michael Knox, Matthew Weston, Jason C Siegler, Scott Brennan, Paul W M Marshall
We examined the effects of a 12-week program of Nordic hamstring exercises (NHE), administered before or after football training, upon eccentric hamstring strength, muscle activity, and architectural adaptations. Amateur soccer players were randomized into 3 groups. The control group (CON; n=11) undertook core stability exercises, whereas a periodized NHE program was delivered either before (NHEBEF ; n=10) or after (NHEAFT ; n=14) bi-weekly training sessions. Outcome measures included peak torque and concomitant normalized peak surface electromyography signals (sEMG) of the biceps femoris (BF) and medial hamstring (MH) muscles during knee flexor maximal eccentric contractions, performed at 30°·s(-1) ...
May 24, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28476902/holistic-hamstring-health-not-just-the-nordic-hamstring-exercise
#2
EDITORIAL
Aiden J Oakley, Jacob Jennings, Chris J Bishop
No abstract text is available yet for this article.
May 5, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28459795/four-weeks-of-nordic-hamstring-exercise-reduce-muscle-injury-risk-factors-in-young-adults
#3
João Breno de A R Alvares, Vanessa Bernardes Marques, Marco Aurélio Vaz, Bruno Manfredini Baroni
The Nordic hamstring exercise (NHE) is a field-based exercise designed for knee-flexor eccentric strengthening, aimed at muscle strains prevention. However, possible effects of NHE programmes on other hamstring injury risk factors remain unclear. The purpose of this study was to investigate the effects of a NHE training programme on multiple hamstring injury risk factors. Twenty physically active young adults were allocated into two equal sized groups: control group (CG) and training group (TG). The TG was engaged in a 4-week NHE programme, twice a week, 3 sets of 6-10 repetitions; while CG received no exercise intervention...
April 26, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28322596/motor-imagery-during-action-observation-increases-eccentric-hamstring-force-an-acute-non-physical-intervention
#4
Matthew Scott, Stephen Taylor, Paul Chesterton, Stefan Vogt, Daniel Lloyd Eaves
PURPOSE: Rehabilitation professionals typically use motor imagery (MI) or action observation (AO) to increase physical strength for injury prevention and recovery. Here we compared hamstring force gains for MI during AO (AO + MI) against two pure MI training groups. MATERIALS AND METHODS: Over a 3-week intervention physically fit adults imagined Nordic hamstring exercises in both legs and synchronized this with a demonstration of the same action (AO + MI), or they purely imagined this action (pure MI), or imagined upper-limb actions (pure MI-control)...
March 21, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28314091/changes-in-muscle-architecture-of-biceps-femoris-induced-by-eccentric-strength-training-with-nordic-hamstring-exercise
#5
D Alonso-Fernandez, P Docampo-Blanco, J Martinez-Fernandez
Eccentric strength training alters muscle architecture, but it is also an important factor for the prevention of hamstring injuries. The purpose was to determine the architectural adaptations of the biceps femoris long head (BFlh) after eccentric strength training with nordic hamstring exercise (NHE), followed by a subsequent detraining period. The participants in this intervention (n=23) completed a period of 13 weeks consisting of a first week of control and prior training, followed by 8 weeks of eccentric strength training with NHE, and concluding with a 4-week period of detraining...
March 17, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28280975/the-effect-of-nordic-hamstring-strength-training-on-muscle-architecture-stiffness-and-strength
#6
Kayla D Seymore, Zachary J Domire, Paul DeVita, Patrick M Rider, Anthony S Kulas
PURPOSE: Hamstring strain injury is a frequent and serious injury in competitive and recreational sports. While Nordic hamstring (NH) eccentric strength training is an effective hamstring injury-prevention method, the protective mechanism of this exercise is not understood. Strength training increases muscle strength, but also alters muscle architecture and stiffness; all three factors may be associated with reducing muscle injuries. The purpose of this study was to examine the effects of NH eccentric strength training on hamstring muscle architecture, stiffness, and strength...
May 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28247444/velocity-specific-and-time-dependent-adaptations-following-a-standardised-nordic-hamstring-exercise-training
#7
Tobias Alt, Yannick T Nodler, Jannik Severin, Axel J Knicker, Heiko K Strüder
The Nordic Hamstring Exercise (NHE) is effective for selective hamstring strengthening to improve muscle balance between knee flexors and extensors. The purpose of this study (within subject design of repeated measures) was to determine the effects of a standardised 4-week NHE training on thigh strength and balance with concomitant kinetic and kinematic monitoring. Sixteen male sprinters (22 years, 181 cm, 76 kg) performed a standardised 4-week NHE training consisting of three sessions per week (each 3 x 3 repetitions)...
March 1, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28167188/the-effect-of-kinesio-taping-versus-stretching-techniques-on-muscle-soreness-and-flexibility-during-recovery-from-nordic-hamstring-exercise
#8
Tarik Ozmen, Gokce Yagmur Gunes, Hanife Dogan, Ilyas Ucar, Mark Willems
The purpose of this study was to examine the effects of static stretching, proprioceptive neuromuscular facilitation (PNF) stretching, or kinesio taping (KT) on muscle soreness and flexibility during recovery from exercise. Sixty-five females were randomly assigned to four groups: PNF stretching (n = 15), static stretching (n = 16), KT (n = 17), and control (n = 17). All participants performed nordic hamstring exercise (5 sets of 8 repetitions). In all groups, hamstring flexibility at 24 h and 48 h was not changed from baseline (p > ...
January 2017: Journal of Bodywork and Movement Therapies
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
#9
REVIEW
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...
May 2017: Sports Medicine
https://www.readbyqxmd.com/read/27660368/impact-of-the-nordic-hamstring-and-hip-extension-exercises-on-hamstring-architecture-and-morphology-implications-for-injury-prevention
#10
RANDOMIZED CONTROLLED TRIAL
Matthew N Bourne, Steven J Duhig, Ryan G Timmins, Morgan D Williams, David A Opar, Aiman Al Najjar, Graham K Kerr, Anthony J Shield
BACKGROUND: The architectural and morphological adaptations of the hamstrings in response to training with different exercises have not been explored. PURPOSE: To evaluate changes in biceps femoris long head (BFLH) fascicle length and hamstring muscle size following 10-weeks of Nordic hamstring exercise (NHE) or hip extension (HE) training. METHODS: 30 recreationally active male athletes (age, 22.0±3.6 years; height, 180.4±7 cm; weight, 80...
March 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/27632836/ankle-position-during-the-nordic-curl-does-not-affect-muscle-activity-of-the-biceps-femoris-and-medial-gastrocnemius
#11
Paul Comfort, Amy Regan, Lee Herrington, Chris Thomas, John McMahon, Paul Jones
CONTEXT: Regular performance (~2 x week) of Nordic curls has been shown to increase hamstring strength and reduce the risk of hamstring strain injury, although no consensus on ankle position has been provided. OBJECTIVE: The aim of this study was to compare the effects of performing Nordic curls, with the ankle in a dorsiflexed (DF) or plantar flexed (PF) position, on muscle activity of the biceps femoris (BF) and medial gastrocnemius (MG). PARTICIPANTS: Fifteen (age 22...
August 24, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27583444/mri-based-regional-muscle-use-during-hamstring-strengthening-exercises-in-elite-soccer-players
#12
Alberto Mendez-Villanueva, Luis Suarez-Arrones, Gil Rodas, Rodrigo Fernandez-Gonzalo, Per Tesch, Richard Linnehan, Richard Kreider, Valter Di Salvo
The present study examined site-specific hamstring muscles use with functional magnetic resonance imaging (MRI) in elite soccer players during strength training. Thirty-six players were randomized into four groups, each performing either Nordic hamstring, flywheel leg-curl, Russian belt or the hip-extension conic-pulley exercise. The transverse relaxation time (T2) shift from pre- to post-MRI were calculated for the biceps femoris long (BFl) and short (BFs) heads, semitendinosus (ST) and semimembranosus (SM) muscles at proximal, middle and distal areas of the muscle length...
2016: PloS One
https://www.readbyqxmd.com/read/27536252/hamstring-architectural-and-functional-adaptations-following-long-vs-short-muscle-length-eccentric-training
#13
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
#14
RANDOMIZED CONTROLLED TRIAL
Ezequiel Rey, Álvaro Paz-Domínguez, David Porcel-Almendral, Víctor Paredes-Hernández, Roberto Barcala-Furelos, Cristian Abelairas-Gómez
Rey, E, Paz-Domínguez, Á, Porcel-Almendral, D, Paredes-Hernández, V, Barcala-Furelos, R, and Abelairas-Gómez, C. Effects of a 10-week Nordic hamstring exercise and Russian belt training on posterior lower-limb muscle strength in elite junior soccer players. J Strength Cond Res 31(5): 1198-1205, 2017-The purpose of this study was to assess the effect of 2 eccentric hamstring training exercises, Nordic hamstring exercise (NHE) and Russian belt (RB), on lower-limb strength and bilateral asymmetry using the single-leg hamstring bridge (SLHB) test...
May 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27467123/impact-of-exercise-selection-on-hamstring-muscle-activation
#15
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/27267402/acute-neuromuscular-and-performance-responses-to-nordic-hamstring-exercises-completed-before-or-after-football-training
#16
COMPARATIVE STUDY
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...
December 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27116347/individual-muscle-use-in-hamstring-exercises-by-soccer-players-assessed-using-functional-mri
#17
RANDOMIZED CONTROLLED TRIAL
R Fernandez-Gonzalo, P A Tesch, R M Linnehan, R B Kreider, V Di Salvo, L Suarez-Arrones, X Alomar, A Mendez-Villanueva, G Rodas
This study used functional magnetic resonance imaging (fMRI) to compare individual muscle use in exercises aimed at preventing hamstring injuries. Thirty-six professional soccer players were randomized into 4 groups, each performing either Nordic hamstring, flywheel leg curl, Russian belt or conic-pulley exercise. MRIs were performed before and immediately after a bout of 4 sets of 8 repetitions. Pre-post exercise differences in contrast shift (T2) were analyzed for the long (BFLh) and short head (BFSh) of biceps femoris, semitendinosus (ST), semimembranosus (SM) and gracilis (GR) muscles...
June 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27075962/hamstring-strength-and-flexibility-after-hamstring-strain-injury-a-systematic-review-and-meta-analysis
#18
REVIEW
Nirav Maniar, Anthony J Shield, Morgan D Williams, Ryan G Timmins, David A Opar
OBJECTIVE: To systematically review the evidence base related to hamstring strength and flexibility in previously injured hamstrings. DESIGN: Systematic review and meta-analysis. DATA SOURCES: A systematic literature search was conducted of PubMed, CINAHL, SPORTDiscus, Cochrane Library, Web of Science and EMBASE from inception to August 2015. INCLUSION CRITERIA: Full-text English articles which included studies which assessed at least one measure of hamstring strength or flexibility in men and women with prior hamstring strain injury within 24 months of the testing date...
August 2016: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/26925310/comparisons-of-eccentric-knee-flexor-strength-and-asymmetries-across-elite-sub-elite-and-school-level-cricket-players
#19
Wade J Chalker, Anthony J Shield, David A Opar, Justin W L Keogh
Background. There has been a continual increase in injury rates in cricket, with hamstring strain injuries (HSIs) being the most prominent. Eccentric knee flexor weakness and bilateral asymmetries are major modifiable risk factors for future HSIs. However, there is a lack of data relating to eccentric hamstring strength in cricket at any skill level. The objective of this study was to compare eccentric knee flexor strength and bilateral asymmetries in elite, sub-elite and school level cricket players; and to determine if playing position and limb role influenced these eccentric knee flexor strength indices...
2016: PeerJ
https://www.readbyqxmd.com/read/26797043/ankle-position-during-the-nordic-curl-does-not-affect-muscle-activity-of-the-biceps-femoris-and-medial-gastrocnemius
#20
Paul Comfort, Amy Regan, Lee Herrington, Chris Thomas, John McMahon, Paul Jones
CONTEXT: Regular performance (~2 x week) of Nordic curls has been shown to increase hamstring strength and reduce the risk of hamstring strain injury, although no consensus on ankle position has been provided. OBJECTIVE: The aim of this study was to compare the effects of performing Nordic curls, with the ankle in a dorsiflexed (DF) or plantar flexed (PF) position, on muscle activity of the biceps femoris (BF) and medial gastrocnemius (MG). PARTICIPANTS: Fifteen (age 22...
January 18, 2016: Journal of Sport Rehabilitation
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