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hamstring muscle extensibility

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https://www.readbyqxmd.com/read/28095102/electromyographic-analysis-of-gluteus-maximus-and-hamstring-activity-during-the-supine-resisted-hip-extension-exercise-versus-supine-unilateral-bridge-to-neutral
#1
James W Youdas, James P Hartman, Brooke A Murphy, Ashley M Rundle, Jenna M Ugorowski, John H Hollman
Hip extension strengthening exercises which maximize gluteus maximus contributions and minimize hamstring influences may be beneficial for persons with hip pain. This study's aim was to compare muscle activation of the gluteus maximus and hamstrings from healthy subjects during a supine resisted hip extension exercise versus supine unilateral bridge to neutral. Surface electromyographic (EMG) signals were obtained from the right gluteus maximus and hamstrings in 13 healthy male and 13 healthy female subjects...
January 17, 2017: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/28090180/a-randomised-placebo-controlled-trial-of-neurodynamic-sliders-on-hamstring-responses-in-footballers-with-hamstring-tightness
#2
Pattanasin Areeudomwong, Ketsarakon Oatyimprai, Saranchana Pathumb
BACKGROUND: Neurodynamics intervention is known to increase apparent muscle extensibility, but information regarding hamstring responses after a neurodynamic sliders (NS) technique is scarce. The aim of this study was to evaluate the effects of NS on apparent hamstring extensibility and activity in footballers with hamstring tightness. METHODS: Forty eligible healthy male footballers with hamstring tightness were each randomly allocated to either a 4-week NS technique or a control group (CG) receiving placebo shortwave intervention...
November 2016: Malaysian Journal of Medical Sciences: MJMS
https://www.readbyqxmd.com/read/28038376/lean-muscle-volume-of-the-thigh-has-a-stronger-relationship-with-muscle-power-than-muscle-strength-in-women-with-knee-osteoarthritis
#3
Michael J Davison, Monica R Maly, Peter J Keir, Sandani M Hapuhennedige, Amie T Kron, Jonathan D Adachi, Karen A Beattie
BACKGROUND: Thigh lean muscle and intramuscular fat have been implicated in the impairment of physical function observed in people with knee osteoarthritis. We investigated the relationships of quadriceps and hamstrings intramuscular fat fraction and lean muscle volume with muscle power and strength, controlling for neuromuscular activation, and physical performance in women with knee OA. METHODS: Women (n=20) 55years or older with symptomatic, radiographic knee osteoarthritis underwent a 3...
November 25, 2016: Clinical Biomechanics
https://www.readbyqxmd.com/read/28029798/should-the-ipsilateral-hamstrings-be-used-for-anterior-cruciate-ligament-reconstruction-in-the-case-of-medial-collateral-ligament-insufficiency
#4
Mirco Herbort, Philipp Michel, Michael J Raschke, Nils Vogel, Martin Schulze, Alexander Zoll, Christian Fink, Wolf Petersen, Christoph Domnick
BACKGROUND: Semitendinosus and gracilis muscles are frequently harvested for autologous tendon grafts for cruciate ligament reconstruction. This study investigated the joint-stabilizing effects of these hamstring muscles in cases of insufficiency of the medial collateral ligament (MCL). HYPOTHESES: First, both the semitendinosus and gracilis muscles can actively stabilize the joint against valgus moments in the MCL-deficient knee. Second, the stabilizing influence of these muscles decreases with an increasing knee flexion angle...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28028870/neuromuscular-performance-of-maximal-voluntary-explosive-concentric-contractions-is-influenced-by-angular-acceleration
#5
D Hahn, P Bakenecker, F Zinke
Torque production during maximal voluntary explosive contractions is considered to be a functionally more relevant neuromuscular measure than steady-state torque, but little is known about accelerated concentric contractions. This study investigated torque, muscle activity, and fascicle behavior during isometric and fast concentric contractions of quadriceps femoris. Ten participants performed maximal voluntary explosive isometric, isovelocity, and additional concentric knee extensions at angular accelerations ranging from 700 to 4000° s(-2) that resulted in an angular velocity of 300° s(-1) at 40° knee flexion...
December 28, 2016: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/27992294/effects-of-a-novel-neurodynamic-tension-technique-on-muscle-extensibility-and-stretch-tolerance-a-counterbalanced-cross-over-study
#6
Max Pietrzak, Niels Bj Vollard
CONTEXT: Neurodynamic tension affects hamstring extensibility and stretch tolerance, and is considered important in hamstring injury management. Neurodynamic tension was postulated to affect segmental muscle extensibility and stretch tolerance, and potentially also demonstrate extra-segmental and contralateral effects. OBJECTIVES: Assess the effects of a novel sciatic-tibial neurodynamic tension technique, the modified long sit slump (MLSS), on segmental, extra-segmental and contralateral muscle extensibility and stretch tolerance...
December 19, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27992239/differential-effects-of-two-rehabilitation-programs-following-anterior-cruciate-ligament-reconstruction
#7
Igor Setuain, Mikel Izquierdo, Fernando Idoate, Eder Bikandi, Esteban M Gorostiaga, Per Aagaard, Eduardo L Cadore, Jesús Alfaro-Adrián
Context- The muscular function restoration related to the type of physical rehabilitation followed after anterior cruciate ligament reconstruction (ACLR) using autologous hamstring tendon graft in terms of strength and cross sectional area (CSA) remain controversial. Objective- To analyze the CSA and force output of quadriceps and hamstring muscles in subjects following either an Objective Criteria-Based rehabilitation (OCBR) algorithm or the usual care (UCR) for ACL rehabilitation in Spain, before and one year after undergoing an ACLR...
December 19, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27834590/clinical-effects-of-dry-needling-among-asymptomatic-individuals-with-hamstring-tightness-a-randomized-controlled-trial
#8
Kathleen Geist, Claire Bradley, Alan Hofman, Rob Koester, Fenella Roche, Annalise Shields, Elizabeth Frierson, Ainsley Rossi, Marie Johanson
STUDY DESIGN: Randomized controlled trial. OBJECTIVES: The aim of this study was to determine the effects of dry needling on hamstring extensibility and functional performance tests among asymptomatic individuals with hamstring muscle tightness. BACKGROUND: Dry needling has been shown to increase range of motion in the upper quarter and may have similar effects in the lower quarter. METHODS: Twenty-seven subjects with hamstring extensibility deficits were randomly assigned to side of treatment (dominant or non-dominant) and group (blunt needling or dry needling)...
November 11, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27807521/assessment-of-isokinetic-muscle-function-in-korea-male-volleyball-athletes
#9
Chang-Gyun Kim, Bog Ja Jeoung
Volleyball players performed numerous repetitions of spike actions, which uses and requires strong and explosive force, and control of the muscles of the shoulder, lower back, and legs. Muscle imbalance is one of the main causes of sport injuries. The purpose of this study was to assess isokinetic muscle functions in male volleyball players. We thus aim to accurately evaluate their muscle functions, and identify the best training strategy to achieve optimal muscle strength balance in future training programs...
October 2016: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/27806635/heterogeneity-of-muscle-activity-during-sedentary-behavior
#10
Arto J Pesola, Arto Laukkanen, Olli Tikkanen, Taija Finni
Replacing sitting by standing has been hypothesized to reduce the health risks of sitting, based on the assumption that muscles are passive during sitting and active during standing. Interventions have been more effective in overweight (OW) than in normal weight (NW) individuals, but subjects' muscle activities have not been quantified. This study compared quadriceps and hamstring muscle electromyographic (EMG) activity between 57 NW (body mass index (BMI) 22.5 ± 1.5 kg/m(2), female n = 36) and 27 OW (BMI 28...
November 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/27755353/predicting-the-functional-roles-of-knee-joint-muscles-from-internal-joint-moments
#11
Teresa E Flaxman, Tine Alkjær, Erik B Simonsen, Michael R Krogsgaard, Daniel L Benoit
INTRODUCTION: Knee muscles are commonly labelled as flexors or extensors and aptly stabilize the knee against sagittal plane loads. However, how these muscles stabilize the knee against adduction-abduction and rotational loads remains unclear. Our study sought to: (1) classify muscle roles as they relate to joint stability by quantifying the relationship between individual muscle activation patterns and internal net joint moments in all three loading planes, and (2) determine if these roles change with increasing force levels...
October 14, 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27740907/muscular-activation-pattern-of-bilateral-extensors-response-to-asymmetric-hand-lifting-during-trunk-flexion-extension-performance
#12
Ying Wei, Xinhai Shan
The authors' purpose was to test the effect of asymmetric hand lifting on muscular activation patterns of 3 bilateral extensors. Eighteen male university students without back pain were volunteered. Each performed flexion-extension randomly with conditions of right lifting, left lifting, and nonlifting. Surface electromyography from bilateral thoracic, lumbar erector spinae, and hamstring was recorded. The cross-correlation and relative intensity in paired muscles of bilateral extensors was calculated in flexion as well as extension period...
October 14, 2016: Journal of Motor Behavior
https://www.readbyqxmd.com/read/27736289/acute-effects-of-foam-rolling-static-stretching-and-dynamic-stretching-during-warm-ups-on-muscular-flexibility-and-strength-in-young-adults
#13
Hsuan Su, Nai-Jen Chang, Wen-Lan Wu, Lan-Yuen Guo, I-Hua Chu
CONTEXT: Foam rolling has been proposed to improve muscle function, performance, and joint range of motion (ROM). However, whether a foam rolling protocol can be adopted as a warm-up to improve flexibility and muscle strength is unclear. OBJECTIVE: To examine and compare the acute effects of foam rolling, static stretching, and dynamic stretching used as part of warm-up on flexibility and muscle strength of knee flexion and extension. DESIGN: Crossover study...
October 13, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27735985/effects-of-early-whole-body-vibration-treatment-on-knee-neuromuscular-function-and-postural-control-after-anterior-cruciate-ligament-reconstruction-a-randomized-controlled-trial
#14
RANDOMIZED CONTROLLED TRIAL
Eugenio Maria Pistone, Luca Laudani, Gianluca Camillieri, Alessandra Di Cagno, Gabriele Tomassi, Andrea Macaluso, Arrigo Giombini
OBJECTIVE: To assess the effects of adding a whole-body vibration protocol at optimal frequency (WBV-OF) to a traditional rehabilitation programme (TRP) early after anterior cruciate ligament reconstruction, on maximal strength and balance, in comparison with a traditional rehabilitation programme. DESIGN: A total of 34 anterior cruciate ligament reconstructed patients with hamstring-tendon graft underwent either 4 weeks of WBV-OF training in addition to a traditional rehabilitation programme, or a traditional rehabilitation programme only, starting from the first month after surgery...
November 11, 2016: Journal of Rehabilitation Medicine
https://www.readbyqxmd.com/read/27716255/alterations-in-neuromuscular-function-in-girls-with-generalized-joint-hypermobility
#15
Bente Rona Jensen, Jesper Sandfeld, Pia Sandfeld Melcher, Katrine Lyders Johansen, Peter Hendriksen, Birgit Juul-Kristensen
BACKGROUND: Generalized Joint Hypermobility (GJH) is associated with increased risk of musculoskeletal joint pain. We investigated neuromuscular performance and muscle activation strategy. METHODS: Girls with GJH and non-GJH (NGJH) performed isometric knee flexions (90°,110°,130°), and extensions (90°) at 20 % Maximum Voluntary Contraction, and explosive isometric knee flexions while sitting. EMG was recorded from knee flexor and extensor muscles. RESULTS: Early rate of torque development was 53 % faster for GJH...
October 3, 2016: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/27669019/effect-of-participants-static-stretching-knowledge-or-deception-on-the-responses-to-prolonged-stretching
#16
W C Ian Janes, Brandon B G Snow, Caisie E Watkins, Elecia A L Noseworthy, Jonathan C Reid, David G Behm
Much of the static stretching (SS) literature reports performance impairments with prolonged SS. However, it has been acknowledged that a limitation of these studies is participants' knowledge or bias. Since many participants have knowledge of the literature, their performance may be subconsciously influenced by expectations. Hence, the objective of this study was to examine the effect of stretching knowledge or deception on subsequent force output following SS. Two groups of male participants who were either aware (BIASED: 14) or unaware (DECEPTION: 14) of the SS literature participated...
October 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/27660368/impact-of-the-nordic-hamstring-and-hip-extension-exercises-on-hamstring-architecture-and-morphology-implications-for-injury-prevention
#17
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...
September 22, 2016: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/27634081/immediate-effects-of-hamstring-stretching-alone-or-combined-with-ischemic-compression-of-the-masseter-muscle-on-hamstrings-extensibility-active-mouth-opening-and-pain-in-athletes-with-temporomandibular-dysfunction
#18
Luis Espejo-Antúnez, Elisa Castro-Valenzuela, Fernando Ribeiro, Manuel Albornoz-Cabello, Anabela Silva, Juan Rodríguez-Mansilla
OBJECTIVE: To assess the immediate effects of hamstrings stretching alone or combined with ischemic compression of the masseter muscle on hamstrings extensibility, active mouth opening and pain in athletes with temporomandibular dysfunction and hamstrings shortening. METHODS: Forty-two participants were randomized to receive the stretching technique (n = 21) or the stretching plus the ischemic compression (n = 21). Outcome measures were: hamstrings extensibility, active mouth opening, pressure pain thresholds and pain intensity...
July 2016: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/27599622/effects-of-motor-control-exercise-vs-muscle-stretching-exercise-on-reducing-compensatory-lumbopelvic-motions-and-low-back-pain-a-randomized-trial
#19
Kyue-Nam Park, Oh-Yun Kwon, Chung-Hwi Yi, Heon-Seock Cynn, Jong-Hyuck Weon, Tae-Ho Kim, Houng-Sik Choi
OBJECTIVES: The purpose of this study was to investigate the effectiveness of a 6-week motor control exercise (MCE) vs stretching exercise (SE) on reducing compensatory pelvic motion during active prone knee flexion (APKF) and intensity of low back pain. METHODS: Thirty-six people in the lumbar-rotation-extension subgroup were randomly assigned equally into 2 exercise groups (18 people in each an MCE or SE group). A 3-dimensional motion-analysis system was used to measure the range and onset time of pelvic motion and knee flexion during APKF...
October 2016: Journal of Manipulative and Physiological Therapeutics
https://www.readbyqxmd.com/read/27592299/prophylactic-knee-bracing-alters-lower-limb-muscle-forces-during-a-double-leg-drop-landing
#20
Katie A Ewing, Justin W Fernandez, Rezaul K Begg, Mary P Galea, Peter V S Lee
Anterior cruciate ligament (ACL) injury can be a painful, debilitating and costly consequence of participating in sporting activities. Prophylactic knee bracing aims to reduce the number and severity of ACL injury, which commonly occurs during landing maneuvers and is more prevalent in female athletes, but a consensus on the effectiveness of prophylactic knee braces has not been established. The lower-limb muscles are believed to play an important role in stabilizing the knee joint. The purpose of this study was to investigate the changes in lower-limb muscle function with prophylactic knee bracing in male and female athletes during landing...
October 3, 2016: Journal of Biomechanics
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