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hamstring muscle extensibility

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https://www.readbyqxmd.com/read/28704884/prone-hip-extension-muscle-recruitment-is-associated-with-hamstring-injury-risk-in-amateur-soccer
#1
Joke Schuermans, Damien Van Tiggelen, Erik Witvrouw
'Core stability' is considered essential in rehabilitation and prevention. Particularly with respect to hamstring injury prevention, assessment and training of lumbo-pelvic control is thought to be key. However, supporting scientific evidence is lacking. To explore the importance of proximal neuromuscular function with regard to hamstring injury susceptibility, this study investigated the association between the Prone Hip Extension (PHE) muscle activation pattern and hamstring injury incidence in amateur soccer players...
July 13, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28704883/validity-and-reliability-of-a-new-device-wimu%C3%A2-for-measuring-hamstring-muscle-extensibility
#2
José M Muyor
The aims of the current study were 1) to evaluate the validity of the WIMU(®) system for measuring hamstring muscle extensibility in the passive straight leg raise (PSLR) test using an inclinometer for the criterion and 2) to determine the test-retest reliability of the WIMU(®) system to measure hamstring muscle extensibility during the PSLR test. 55 subjects were evaluated on 2 separate occasions. Data from a Unilever inclinometer and WIMU(®) system were collected simultaneously. Intraclass correlation coefficients (ICCs) for the validity were very high (0...
July 13, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28630577/effects-of-high-velocity-elastic-band-versus-heavy-resistance-training-on-hamstring-strength-activation-and-sprint-running-performance
#3
Donatas Janusevicius, Audrius Snieckus, Albertas Skurvydas, Viktoras Silinskas, Eugenijus Trinkunas, Joan Aureli Cadefau, Sigitas Kamandulis
Hamstring muscle injuries occur during high-speed activities, which suggests that muscular strength at high velocities may be more important than maximal strength. This study examined hamstring adaptations to training for maximal strength and for strength at high velocities. Physically active men (n = 25; age, 23.0 ± 3.2 years) were randomly divided into: (1) a resistance training (RT, n = 8) group, which performed high-load, low-velocity concentric-eccentric hamstring contractions; (2) a resistance training concentric (RTC; n = 9) group, which performed high-load, low-velocity concentric-only hamstring contractions; and (3) a high-velocity elastic band training (HVT, n = 8) group, which performed low-load, high-velocity concentric-eccentric hamstring contractions...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28573973/knee-flexion-with-quadriceps-cocontraction-a-new-therapeutic-exercise-for-the-early-stage-of-acl-rehabilitation
#4
Andrea Biscarini, Samuele Contemori, Daniele Busti, Fabio M Botti, Vito E Pettorossi
Quadriceps strengthening exercises designed for the early phase of anterior cruciate ligament (ACL) rehabilitation should limit the anterior tibial translation developed by quadriceps contraction near full knee extension, in order to avoid excessive strain on the healing tissue. We hypothesize that knee-flexion exercises with simultaneous voluntary contraction of quadriceps (voluntary quadriceps cocontraction) can yield considerable levels of quadriceps activation while preventing the tibia from translating forward relative to the femur...
December 8, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/28533596/the-ratio-of-medial-and-lateral-hamstring-muscle-thickness-does-not-correlate-with-the-lateral-tibial-rotation-angle-in-the-standing-position-in-healthy-young-adults
#5
Dong-Soo Lee, Sung-Dae Choung, Seung-Won Lee, Hye Rim Suh, Jae-Hoon Shim
[Purpose] To investigate the relationship between the lateral tibial rotation angle during knee joint flexion and the medial and lateral hamstring muscle thickness ratio during knee joint extension while resting, doing nothing, in upright standing position. The lateral tibial torsion is an important factor of orthopedic knee joint diseases as well as other weight bearing joint diseases such as osteoarthritis, meniscus syndrome, anterior cruciate ligament rupture, etc. [Subjects and Methods] Thirty healthy young adults participated in this study...
April 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28532865/hamstring-muscle-length-and-pelvic-tilt-range-among-individuals-with-and-without-low-back-pain
#6
Francis Oluwafunsho Fasuyi, Ayodele A Fabunmi, Babatunde O A Adegoke
Hamstring tightness has been documented not to be related to the pelvic tilt position during static standing posture, but there is limited data on the relationship between hamstring muscle length (HML) and pelvic tilt range (PTR) during the dynamic movement of forward bending. This ex-post facto study was designed to compare each of HML and PTR in individuals with low back pain (LBP) and counterparts without LBP, and the relationship between HML and PTR in individuals with and without LBP. The study involved 30 purposively recruited individuals with LBP and 30 height and weight-matched individuals without LBP...
April 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28507370/a-comparative-study-of-dynamic-soft-tissue-mobilization-vs-passive-stretching-technique-to-improve-the-flexibility-of-hamstrings-in-cricket-players
#7
Mohsin Abbas, Muhammad Salman Bashir, Rabiya Noor
Different therapies are available for correcting the tightness of hamstring muscles. Objective of this study was to compare the effectiveness of Dynamic Soft Tissue Mobilization DSTM technique and Passive Stretching PS to improve the flexibility of tight hamstrings in cricket players. A total of 120 cricket players having tightness of hamstrings were enrolled and randomized into two groups A and B using lottery method. Group-A was treated with DSTM and group-B with PS to improve the flexibility of hamstrings...
May 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28476110/restriction-in-lateral-bending-range-of-motion-lumbar-lordosis-and-hamstring-flexibility-predicts-the-development-of-low-back-pain-a-systematic-review-of-prospective-cohort-studies
#8
Sean G Sadler, Martin J Spink, Alan Ho, Xanne Janse De Jonge, Vivienne H Chuter
BACKGROUND: Low back pain (LBP) is an increasingly common condition worldwide with significant costs associated with its management. Identification of musculoskeletal risk factors that can be treated clinically before the development of LBP could reduce costs and improve the quality of life of individuals. Therefore the aim was to systematically review prospective cohort studies investigating lower back and / or lower limb musculoskeletal risk factors in the development of LBP. METHODS: MEDLINE, EMBASE, AMED, CINAHL, SPORTDiscus, and the Cochrane Library were searched from inception to February 2016...
May 5, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28451436/loading-conditions-in-the-spine-hip-and-knee-during-different-executions-of-back-extension-exercises
#9
Florian Schellenberg, Nicole Schmid, Ramona Häberle, Nicole Hörterer, William R Taylor, Silvio Lorenzetti
BACKGROUND: Back extension (BE) is a strength exercise for training the dorsal trunk and hip muscles. To optimise training recommendations that avoid overloading and possible injury, the aim of this study was to determine the loading conditions and the influence of different execution forms of BE on spine, hip and knee ranges of motion (RoMs), joint moments and muscle activity. METHODS: The kinematics, kinetics and muscle activity (EMG) of two execution types (BEh: dynamic hip, BEs: dynamic spine) and two versions (one-legged and two-legged) of BE were measured in 16 subjects...
2017: BMC Sports Science, Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28439304/is-percutaneous-medial-hamstring-myofascial-lengthening-as-anatomically-effective-and-safe-as-the-open-procedure
#10
T Mansour, J Derienne, M Daher, D Sarraf, Y Zoghbi, I Ghanem
BACKGROUND: Medial hamstring fractional lengthening is commonly performed in children with cerebral palsy (CP) to decrease contracture and/or to improve gait. Percutaneous procedures are gaining more and more popularity, even in the paediatric population, with equivocal results. The purpose of this paper was to determine the efficacy and safety of percutaneous medial hamstring myofascial lengthening (PHL). METHODS: This is a prospective randomised controlled trial including 31 knees from 18 consecutive patients with CP scheduled for medial hamstring lengthening in the setting of multilevel tendon lengthening procedures in a university hospital...
2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28429109/associations-of-maximal-voluntary-isometric-hip-extension-torque-with-muscle-size-of-hamstring-and-gluteus-maximus-and-intra-abdominal-pressure
#11
Kota Tayashiki, Kosuke Hirata, Kiraku Ishida, Hiroaki Kanehisa, Naokazu Miyamoto
PURPOSE: Muscle size of the hamstring and gluteus maximus (GM) as well as intra-abdominal pressure (IAP) are considered as factors affecting the torque development during hip extension. This study examined the associations of torque development during maximal voluntary isometric hip extension with IAP and muscle size of the hamstring and GM. METHODS: Anatomical cross-sectional area (ACSA) of the hamstring and thickness of GM were determined in 20 healthy young males using an ultrasonography apparatus (Experiment 1)...
April 20, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28409515/effects-of-stretching-and-fatigue-on-peak-torque-muscle-imbalance-and-stability
#12
Pablo B Costa, Cassio V Ruas, Cory M Smith
BACKGROUND: The present study examined the acute effects of hamstrings stretching and fatigue on knee extension and flexion peak torque (PT), hamstrings to quadriceps (H:Q) ratio, and postural stability. METHODS: Seventeen women (mean ± SD age = 21.8 ± 2.1 yrs; body mass = 63.0 ± 10.5 kg; height = 164.7 ± 6.2 cm) and eighteen men (25.8 ± 4.6 yrs; 83.6 ± 13.2 kg; 175.3 ± 6.0 cm) took part in three laboratory visits. The first visit was a familiarization session, and the subsequent two visits were randomly assigned as a control or stretching condition...
April 13, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28400662/early-anterior-cruciate-ligament-reconstruction-can-save-meniscus-without-any-complications
#13
Chang-Ik Hur, Eun-Kyoo Song, Sung-Kyu Kim, Seung-Hun Lee, Jong-Keun Seon
BACKGROUND: Early ACL reconstruction, before retuning to activity eliminates recurrent episodes of instability and thereby decreases chances of meniscal and cartilage injury. However, there are no clear and uniform guidelines regarding the timing of ACL reconstruction or clarity in the definition of early and delayed reconstruction to reduce the complications after reconstruction in the ACL injured knee. The purpose of this study was to compare the clinical outcome, stability, muscle power, and postural control after early and delayed anterior cruciate ligament (ACL) reconstruction...
March 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28391391/the-acute-benefits-and-risks-of-passive-stretching-to-the-point-of-pain
#14
Pornpimol Muanjai, David A Jones, Mantas Mickevicius, Danguole Satkunskiene, Audrius Snieckus, Albertas Skurvydas, Sigitas Kamandulis
PURPOSE: This study evaluated the acute effects of two different stretch intensities on muscle damage and extensibility. METHODS: Twenty-two physically active women (age 20 ± 1.0 years) were divided into two matched groups and undertook eight sets of 30-s passive hamstring stretching. One group stretched to the point of discomfort (POD) and the other to the point of pain (POP). Hamstring passive torque, sit and reach (S&R), straight leg raise (SLR), and markers of muscle damage were measured before, immediately after stretching and 24 h later...
April 8, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28350712/effect-of-knee-joint-angle-and-contraction-intensity-on-hamstrings-coactivation
#15
Rui Wu, Eamonn Delahunt, Massimiliano Ditroilo, Madeleine M Lowery, Giuseppe DE Vito
PURPOSE: This study investigated the effect of knee joint angle and contraction intensity on the coactivation of the hamstring muscles (when acting as antagonists to the quadriceps) in young and older individuals of both sexes. METHODS: A total of 25 young (24 ± 2.6 yr) and 26 older (70 ± 2.5 yr) healthy men and women participated. Maximal voluntary isometric contraction of the knee extensors and flexors was assessed at two knee joint angles (90° and 60°, 0° = full extension)...
August 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28324993/dynamic-knee-muscle-co-contraction-quantified-during-walking
#16
Annachiara Strazza, Alessandro Mengarelli, Valentina Agostini, Marco Knaflitz, Laura Burattini, Sandro Fioretti, Francesco Di Nardo
The purpose of the present study was the quantification of the co-activation patterns of the knee extensor and flexor muscles during walking at self-selected speed and cadence. To this aim, the Statistical Gait Analysis, a recent methodology providing a statistical characterization of gait, was performed on surface EMG signals from Vastus Lateralis (VL) and Medial Hamstrings (MH) in 14 healthy young adult subjects. Muscular co-contraction was assessed as the overlapping period between activation intervals of agonist and antagonist muscles...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28285012/two-stage-treatment-of-ischial-pressure-ulcers-in-spinal-cord-injury-patients-technique-and-outcomes-over-8-years
#17
Sumanas W Jordan, Mauricio De la Garza, Victor L Lewis
BACKGROUND: Despite newly introduced techniques, reconstruction of ischial pressure ulcers remains a difficult problem with high-reported failure rates. METHODS: A retrospective chart review was performed on all spinal cord injury patients who underwent ischial pressure ulcer reconstruction by the senior author (V.L.) between 2004 and 2012. The two-stage procedure consisted of debridement and bone biopsy, followed by bursectomy, partial ischiectomy, fascial release, and gluteus maximus and hamstring advancement flaps...
January 23, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28268344/the-variability-of-co-activation-pattern-of-antagonist-muscles-in-human-infant-crawling
#18
Qi L Xiong, Xiao Y Wu, Nong Xiao, Si Y Zeng, Xiao L Zheng, Di Wu, Wen S Hou
Infant crawling is part of normal human gross motor development, and a 4-beat gait that involves rhythmical flexion and extension of limbs and the underlying muscle co-activation of antagonist muscle around the joint. However, detection the co-activation pattern of antagonist muscle are sparse due to the general difficulty of measuring locomotion in human infants. In this paper, sEMG of antagonist muscles and the corresponding kinematics data of limbs were collected when infants were crawling on hands and knees at their self-selected speed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28265144/immediate-effects-of-graston-technique-on-hamstring-muscle-extensibility-and-pain-intensity-in-patients-with-nonspecific-low-back-pain
#19
Jong Hoon Moon, Jin-Hwa Jung, Young Sik Won, Hwi-Young Cho
[Purpose] The purpose of this study was to analyze the effect of Graston Technique on hamstring extensibility and pain intensity in patients with nonspecific low back pain. [Subjects and Methods] Twenty-four patients with nonspecific low back pain (27-46 years of age) enrolled in the study. All participants were randomly assigned to one of two groups: Graston technique group (n=12) and a static stretching group (n=12). The Graston Technique was used on the hamstring muscles of the experimental group, while the static stretching group performed static stretching...
February 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28259710/no-beneficial-effect-of-bracing-after-anterior-cruciate-ligament-reconstruction-in-a-cohort-of-969-athletes-followed-in-rehabilitation
#20
P Bordes, E Laboute, A Bertolotti, J F Dalmay, P Puig, P Trouve, E Verhaegue, P A Joseph, P Dehail, M De Seze
OBJECTIVE: Compare the clinical outcomes of different knee braces in the early phase of rehabilitation after anterior cruciate ligament reconstruction (ACLR) in athletes. MATERIALS AND METHODS: We conducted a retrospective database study of athletes during early rehabilitation in a tertiary referral hospital between 1 February 2008 and 30 October 2010 after ACLR using bone patellar tendon bone (BPTB) or hamstring autograft. Differences in mid-patellar knee circumference, pain, and range of motion were assessed at admission...
July 2017: Annals of Physical and Rehabilitation Medicine
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