Bibliografias temáticas / Hamstring muscles

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Literatura científica selecionada sobre o tema "Hamstring muscles"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 7 de julho de 2024

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Artigos de revistas sobre o assunto "Hamstring muscles"

Mirawati, Dita, and Asita Rohmah Mutnawasitoh. "EFFECT OF NEURODYNAMIC SLIDER ON INCREASING HAMSTRING MUSCLE FLEXIBILITY IN RANTAYA PUTRI ALUS DANCERS." Gaster 21, no. 1 (2023): 79–90. http://dx.doi.org/10.30787/gaster.v21i1.1029.

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Flexibility is ability of a joint, muscles and ligaments around it to move freely and comfortably within the maximum expected range of motion. Flexibility is influenced by many factors such as anatomical condition, gender, body mass index, age, physical activity, injury, and training experience. The hamstring muscles are primarily fast-twitch and powerful movement types, so that the hamstrings are resistant to overloading but tire quickly on excessive repetitions. Excessive activity that involves contracting the hamstring muscles will cause the hamstring muscles to experience decreased flexibi

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Lempainen, Lasse, Jussi Kosola, Ricard Pruna, et al. "Central Tendon Injuries of Hamstring Muscles: Case Series of Operative Treatment." Orthopaedic Journal of Sports Medicine 6, no. 2 (2018): 232596711875599. http://dx.doi.org/10.1177/2325967118755992.

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Background: As compared with injuries involving muscle only, those involving the central hamstring tendon have a worse prognosis. Limited information is available regarding the surgical treatment of central tendon injuries of the hamstrings. Purpose: To describe the operative treatment and outcomes of central tendon injuries of the hamstrings among athletes. Study Design: Case series; Level of evidence, 4. Methods: Eight athletes (6 top level, 2 recreational) with central hamstring tendon injuries underwent magnetic resonance imaging and surgical treatment. The indication for surgery was recur

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Avrillon, Simon, Gaël Guilhem, Aude Barthelemy, and François Hug. "Coordination of hamstrings is individual specific and is related to motor performance." Journal of Applied Physiology 125, no. 4 (2018): 1069–79. http://dx.doi.org/10.1152/japplphysiol.00133.2018.

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The torque-sharing strategies between synergistic muscles may have important functional consequences. This study involved two experiments. The first experiment ( n = 22) aimed 1) to determine the relationship between the distribution of activation and the distribution of torque-generating capacity among the heads of the hamstring, and 2) to describe individual torque-sharing strategies and to determine whether these strategies are similar between legs. The second experiment ( n = 35) aimed to determine whether the distribution of activation between the muscle heads affects endurance performanc

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Vertullo, Christopher J., Jason M. Konrath, Benjamin Kennedy, Hamish Bush, Rodney S. Barrett, and David G. Lloyd. "HAMSTRING MORPHOLOGY AND STRENGTH REMAIN ALTERED 2 YEARS FOLLOWING A HAMSTRING GRAFT IN ACL RECONSTRUCTION." Orthopaedic Journal of Sports Medicine 5, no. 5_suppl5 (2017): 2325967117S0018. http://dx.doi.org/10.1177/2325967117s00181.

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Background: The hamstring graft used in anterior cruciate ligament (ACL) reconstruction has been shown to lead to changes to the semitendinosus and gracilis musculature. This study further evaluated the effect of the surgery on hamstring muscle morphology and knee muscle strength at 2 years post-surgery. Hypotheses: (1) Loss of donor muscle size would significantly correlate with knee muscle strength deficits (2) Loss of donor muscle size would be greater for muscles that do not experience tendon regeneration, and (3) Morphological adaptations would also be evident in non-donor knee muscles. S

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Crawford, Scott K., Kenneth S. Lee, Greg R. Bashford, and Bryan C. Heiderscheit. "Spatial-frequency Analysis of the Anatomical Differences in Hamstring Muscles." Ultrasonic Imaging 43, no. 2 (2021): 100–108. http://dx.doi.org/10.1177/0161734621990707.

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Spatial frequency analysis (SFA) is a quantitative ultrasound method that characterizes tissue organization. SFA has been used for research involving tendon injury, but may prove useful in similar research involving skeletal muscle. As a first step, we investigated if SFA could detect known architectural differences within hamstring muscles. Ultrasound B-mode images were collected bilaterally at locations corresponding to proximal, mid-belly, and distal thirds along the hamstrings from 10 healthy participants. Images were analyzed in the spatial frequency domain by applying a two-dimensional F

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Rovendra, Erit. "Pengaruh Pemberian Cryoterapi Dan Stretching Exercise Terhadap Penurunan Cedera Hamstring Pada Pemain Sepak Bola Remaja Di Nagari Tandikat Selatan Tahun 2020." Journal of Health Educational Science And Technology 4, no. 1 (2021): 57–72. http://dx.doi.org/10.25139/htc.v4i1.3778.

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Abstrak : Cedera hamstring adalah cedera pada jaringan otot hamstringkarena kerusakan langsung atau tidak langsung akibat teregang melebihi batas normal. Cedera ini sering terjadi pada bagian groin muscles, hamstring, dan otot quadricep.Cedera ini sering terjadi pada atlet dimana salah satu otot paha belakang mengalami robekan atau peregangan akibat trauma dan gerakan mendadak atau gerakan tiba-tiba berhenti.Olahraga dengan intesitas gerakan kombinasi seperti sprint, fleksibilitas, kelincahan, dan kekuatan otot yang besar, sering mengalami cedera ini. Pada cedera hamstring para atlit biasanya

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Harput, Gulcan, Hasan Erkan Kılınc, Hamza Özer, Gül Baltacı, and Carl G. Mattacola. "Knee Muscle Strength Recovery in the Early Period After ACL Reconstruction." Orthopaedic Journal of Sports Medicine 2, no. 11_suppl3 (2014): 2325967114S0014. http://dx.doi.org/10.1177/2325967114s00141.

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Objectives: The aim of this study was to investigate quadriceps and hamstrings isometric strength at 4, 8 and 12 week time points following ACL Reconstruction (ACLR) and to document the strength changes of these muscles over time. The primary hypothesis was that there would be significant increases in quadriceps and hamstring muscle strengths between the 4th, 8th and 12th weeks following ACLR. The secondary hypothesis was that the quadriceps index would be higher than hamstring index at 12th week after ACLR. Methods: Thirty patients (Mean ± SD [age, 29.1±2.3yrs; weight, 77.3±13.2kg; height, 17

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Vachhani, Rooju, and Himanshi Sharma. "Effectiveness of Suboccipital Muscle Inhibition Technique versus Muscle Energy Technique on Hamstring Muscle Flexibility in College Going Students." International Journal of Research and Review 8, no. 6 (2021): 160–74. http://dx.doi.org/10.52403/ijrr.20210620.

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Background: Hamstring is one of the commonest muscle which often gets tight. Suboccipital muscle inhibition technique is a method of relaxing tension in four muscles located between occiput and axis which regulates the upper cervical vertebra. When the tone of suboccipital muscles falls, it has been reported that the tone of knee flexors such as hamstrings also decreases due to relaxation of myofascia. This is because hamstrings and suboccipital muscles are connected by one neural system, which passes through the duramater called the superficial back line. Muscle energy technique is a procedur

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Ahn, Jin-Oh, Jong-Hyuck Weon, Eun-Kyung Koh, and Do-Young Jung. "Effectiveness of hamstring stretching using a pressure biofeedback unit for 4 weeks: A randomized controlled trial." Hong Kong Physiotherapy Journal 40, no. 02 (2020): 99–107. http://dx.doi.org/10.1142/s1013702520500092.

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Background: Stretching and length test of hamstring muscles have been performed commonly to manage lower back pain (LBP) in sports rehabilitation. Previous literatures addressed that stretching techniques and length test of hamstring muscles should be performed with the pelvic maintained in an anterior tilt position. However, there is no study to determine the effectiveness of pressure biofeedback unit (PBU) to maintain in anterior pelvic tilting (APT) on length test and stretching of hamstring muscles. Objective: To determine the effectiveness of hamstring muscles stretching using a PBU. Meth

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Richardson, C., and M. I Bullock. "Changes in muscle activity during fast, alternating flexion-extension movements of the knee." Journal of Rehabilitation Medicine 18, no. 2 (2020): 51–58. http://dx.doi.org/10.2340/165019771986185158.

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The effects of high frequency alternating knee flexion-extension on muscle activity of the quadriceps and hamstring muscle groups has been investigated. Standard loads were used for each subject. The muscle activity in vastus medialis, vastus lateralis, rectus femoris and the lateral hamstrings were recorded by electromyography during increasing velocities. Rectus femoris and hamstrings were found to increase their activities significantly with increasing speed while vastus medialis and vastus lateralis showed no such change. The individual thigh muscles thus differ in function in relation to

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Teses / dissertações sobre o assunto "Hamstring muscles"

Sole, Gisela, and n/a. "Neuromuscular control of thigh and gluteal muscles following hamstring injuries." University of Otago. School of Physiotherapy, 2008. http://adt.otago.ac.nz./public/adt-NZDU20081103.100628.

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Although traditional prevention and management strategies for hamstring injuries have focussed on optimising muscle strength, flexibility and endurance, incidence and/or recurrence rates of these injuries remains high. A theoretical framework was developed considering additional factors that increase the stabilising demand of the hamstrings. These factors included loss of related stability at the knee and lumbopelvic regions and extrinsic factors during functional and sporting activities. The aims of this research were to determine whether electromyographic (EMG) derived hamstrings, quadriceps

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Fernandes, Santos Amanda Aparecida. "The effect of joint angle on surface electromyography amplitude of hamstring muscles." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/231385/1/Amanda%20Aparecida_Fernandes%20Santos_Thesis.pdf.

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This thesis investigated the effect of knee angle position on the electrical signal of two hamstring muscles using a traditional technique (bipolar electromyography) and a modern technique (high-density electromyography). The results suggest that changes in knee position affect the electrical activity on bipolar electromyography and these changes are associated with the rotation of muscle fibers under the pair of electrodes. However, using high-density electromyography, there was no difference between different knee positions. These findings suggest that high-density electromyography has diffe

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Al-Mousawi, Abdul-Majeed M. "A study of warm-up and injury in hamstring muscles." Thesis, University of Glasgow, 2005. http://theses.gla.ac.uk/6899/.

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This project is the first to investigate blood perfusion in the human hamstrings during isometric exercise with a near infrared spectroscopy (NIRS). A Kin Com dynamometer has been used to fix the knee positions and to measure torques during contractions. Both the NIRS optodes and the electromyography (EMG) electrodes were attached to the skin over the hamstrings. Previous studies used a NIRS to measure muscle blood flow in the forearm, quadriceps and calf muscles. The changes in haemoglobin concentrations were calculated using Spike 2 software. A total of 46 male volunteers participated in the

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Dombroski, Erik. "The influence of cyclic loading on the extensibility of human hamstring muscle-tendon units in vivo a thesis submitted in partial fulfilment for the degree of Master of Health Science, Auckland University of Technology, 2005." Full thesis. Abstract, 2005. http://puka2.aut.ac.nz/ait/theses/DombroskiE.pdf.

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Tafazzoli, Faryaneh. "Mechanical behaviour of hamstring muscles in low-back pain patients and control subjects." Thesis, University of Ottawa (Canada), 1994. http://hdl.handle.net/10393/9583.

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Baker, Alice Ann. "The Relative Contribution of Flexibility of the Back and Hamstring Muscles in the Performance of the Sit and Reach Component of the AAHPERD Health Related Fitness Test in Girls Thirteen to Fifteen Years of Age." Thesis, North Texas State University, 1985. https://digital.library.unt.edu/ark:/67531/metadc500769/.

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The purpose of the study was to quantify the relative contribution of low back flexibility and hamstring flexibility in the sit and reach test item of the AAHPERD Health Related Fitness Test in order to examine the validity of the sit and reach test. Subjects were 100 female students, 13 to 15 years of age in physical education classes. Hamstring flexibility was measured using the Leighton flexometer. Spinal mobility was measured using a tape measure. The sit and reach test was performed according to instructions given in the AAHPERD Test Manual. Data were analyzed using correlation, linear re

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Jennings, Andrew George. "Neurophysiological changes in muscles around the knee following injury to the anterior cruciate ligament." Thesis, University of Newcastle Upon Tyne, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313269.

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Dobija, Lech. "Effet immédiat de l'étirement des muscles ischio-jambiers chez les patients présentant une lombalgie chronique." Electronic Thesis or Diss., Université Clermont Auvergne (2021-...), 2023. http://www.theses.fr/2023UCFA0127.

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Malgré les progrès réalisés par le système de santé, la lombalgie chronique reste la principale cause d'invalidité. Le déficit d'extensibilité des muscles ischio-jambiers (MIJ), combiné à un déficit de contrôle neuromusculaire, contribue à l'invalidité dans la lombalgie chronique. Dans ce travail, nous décrivons d'abord les mécanismes de la douleur, le modèle biopsychosocial et la biomécanique, en se concentrant sur les déficits d'extensibilité des MIJ. Ensuite, nous estimons les propriétés métrologiques des mesures de l'extension active du genou, Active Knee Extension (AKE), et de la levée de

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Reynolds, Jonathan F. "A comparative study of the effects of meclofenamate, diclofenac and placebo, in combination with physiotherapy, on the healing of acute quadriceps and hamstring muscle tears." Master's thesis, University of Cape Town, 1991. http://hdl.handle.net/11427/27131.

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A double-blind, placebo controlled research technique was used to determine the effects of two non-steroidal anti-inflammatory drugs, meclofenamate and diclofenac, in combination with physiotherapy treatment, on the rate and extent of healing of acute hamstring muscle tears. Sixty patients were recruited and treated at No's 1 and 2 Military Hospitals in Voortrekkerhoogte and Wynberg, Cape Town, respectively. Patients were randomly allocated to one of three treatment groups: meclofenamate, diclofenac and placebo. Patient assessments were performed on days 1, 3 and 7 of the 7-day study period. T

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Rösemann, Christel. "The effect of high intensity training on the angle-torque relationship of the quadriceps and hamstring muscles in a group of well-trained cyclists." Master's thesis, University of Cape Town, 2008. http://hdl.handle.net/11427/2993.

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Livros sobre o assunto "Hamstring muscles"

O'Sullivan, Kieran. The role of muscle strength in hamstring injury. Nova Science Publishers, 2010.

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Quadriceps/hamstrings strength ratios and hip flexibility as predictors of hamstring injuries. 1985.

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Armstrong, Douglas. Quadriceps-hamstring ratios for isotonic and isokinetic measurements. 1985.

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Armstrong, Douglas. Quadriceps-hamstring ratios for isotonic and isokinetic measurements. 1985.

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Douglas, Armstrong. Quadriceps-hamstring ratios for isotonic and isokinetic measurements. 1985.

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Quadriceps-hamstring ratios for isotonic and isokinetic measurements. 1985.

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Douglas, Armstrong. Quadriceps-hamstring ratios for isotonic and isokinetic measurements. 1985.

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An electromyographic analysis of the hamstring muscles during bicycle ergometry. 1988.

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An electromyographic analysis of the hamstring muscles during bicycle ergometry. 1990.

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An electromyographic analysis of the hamstring muscles during bicycle ergometry. 1990.

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Capítulos de livros sobre o assunto "Hamstring muscles"

Volpi, Piero, and Gian Nicola Bisciotti. "Conservative Treatment for Hamstring Muscles Injuries." In Muscle Injury in the Athlete. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-16158-3_9.

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Bermejo-García, Javier, Daniel Rodríguez-Jorge, Ashwin Jayakumar, Rafael Agujetas Ortiz, Francisco Romero-Sánchez, and Francisco Javier Alonso-Sánchez. "Assessment of Lower Limb Muscle Activation During Gait Assisted by a Cable-Actuated Exoskeleton." In Proceedings of the XV Ibero-American Congress of Mechanical Engineering. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-38563-6_17.

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AbstractThis study aims to evaluate the modifications that occur in the neuromuscular system during a walking assistance device through a wearable exoskeleton or exosuit. We propose to study the muscle activations and forces obtained by inverse dynamic analysis at different levels of exosuit actuation and anchor points, with the aim of obtaining an actuation map that will allow us to optimize both the design and the actuation of the exosuit. In addition, metabolic probes were calculated to estimate the influence of the exosuit on energy consumption. The results suggest a reduction in the muscle activations and forces exerted by the hamstring muscles of the actuated leg, especially the semitendinosus muscle and biceps femoris, compared to a non-actuated gait. In contrast, the muscle strength of the other muscles remains unchanged. Our results suggest that the configuration at 70% of femur length shows better results in reducing metabolic cost compared to the other configurations.

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Ono, Takashi. "The Relationship Between Eccentric Exercise and Muscle Damage in Hamstring Muscles." In Sports Injuries and Prevention. Springer Japan, 2015. http://dx.doi.org/10.1007/978-4-431-55318-2_26.

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Higashihara, Ayako, Takashi Ono, and Toru Fukubayashi. "Differences in Activation Patterns of the Hamstring Muscles During Sprinting." In Sports Injuries and Prevention. Springer Japan, 2015. http://dx.doi.org/10.1007/978-4-431-55318-2_25.

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Teixeira, G. C., M. C. A. Brandão, and L. F. Oliveira. "Differences in Shear Modulus Among Hamstring Muscles After an Acute Stretching." In XXVII Brazilian Congress on Biomedical Engineering. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-70601-2_67.

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Yanagisawa, Osamu. "Functional Differences Among Hamstring Muscles in Hip Extension and Knee Flexion Exercises." In Sports Injuries and Prevention. Springer Japan, 2015. http://dx.doi.org/10.1007/978-4-431-55318-2_23.

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Orlandi, Davide, and Luca Maria Sconfienza. "Hamstrings." In Ultrasound Anatomy of Lower Limb Muscles. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-14894-6_12.

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van der Made, Anne D., Thijs Wieldraaijer, Lars Engebretsen, and Gino M. M. J. Kerkhoffs. "Hamstring Muscle Injury." In Acute Muscle Injuries. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-03722-6_3.

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Othman, Siti Hajar, N. F. Muhammad, F. Ibrahim, and S. Z. Omar. "Muscles activity of the Back and Hamstring during Trunk Flexion and Extension Task in Healthy and Low Back Pain Women." In 3rd Kuala Lumpur International Conference on Biomedical Engineering 2006. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-68017-8_55.

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Lempainen, Lasse, Janne Sarimo, Pekka Niemi, and Sakari Orava. "Indications for Surgical Treatment in Hamstring Tears." In Muscle and Tendon Injuries. Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54184-5_26.

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Trabalhos de conferências sobre o assunto "Hamstring muscles"

Georgiev, Yordan, Nezabravka Gencheva, and Todor Marinov. "RESEARCH OF HAMSTRINGS MUSCLES IN CHILDREN SPORTS KARATE." In INTERNATIONAL SCIENTIFIC CONGRESS “APPLIED SPORTS SCIENCES”. Scientific Publishing House NSA Press, 2022. http://dx.doi.org/10.37393/icass2022/162.

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ABSTRACT The functional disorder of the hamstrings muscles is associated with prolonged sitting in a chair, poor posture, lack of motor activity and others. Maintaining elastic muscle tissue is an important factor for children practicing martial arts; karate in particular. This study has the purpose to examine hamstring muscles and their condition in children practicing karate. Methodology During the period between March - May 2022, we worked with 30 children in total, in the age group between 8-10 years old, who were practicing karate or boxing in clubs “Fighters”, located in the city of Varn

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Rehorn, Michael R., and Silvia S. Blemker. "3D Finite Element Modeling of the Biceps Femoris Muscle." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206695.

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Hamstring strain injury is a significant problem for many athletes [1]. Muscle-tendon (MT) length changes and activation patterns during the sprinting cycle likely contribute to the high risk of injury. It has been suggested that injury may occur during the late swing phase of the sprinting cycle when the hamstring fibers experience activated muscle lengthening [2]. Of the hamstrings muscles, the biceps femoris longhead (BFLH) is the most commonly injured, with the injury most frequently localized along the proximal muscle-tendon junction [3]. We hypothesize that the injuries are localized in

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Ghufroni, Afif, and Jasmine Kartiko Pertiwi. "Effectiveness of Muscle Energy Technique to Increase Hamstring Muscle Flexibility in Adolescents." In The 7th International Conference on Public Health 2020. Masters Program in Public Health, Universitas Sebelas Maret, 2020. http://dx.doi.org/10.26911/the7thicph.02.29.

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Background: Shortening of the hamstring muscles results in pain, limited range of motion, postural instability, and abnormal gait, which effect on daily activities. Muscle energy technique provides a solution to shortening the hamstring muscles by improving muscle flexibility. This study aimed to examine the effectiveness of muscle energy technique in increasing hamstring muscle flexibility in adolescents. Subjects and Method: This was a quasi-experiment pretest-posttest without a control group conducted at No. 1 High School Jogonalan, Klaten, Central Java in April 2018. A total of 30 students

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Shadmehr, Azadeh, and Hasan Nadimi Astaneh. "Continuous vs. pulse ultrasound therapy on the flexibility of short hamstring muscles." In 2009 IEEE International Ultrasonics Symposium. IEEE, 2009. http://dx.doi.org/10.1109/ultsym.2009.5441427.

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Higashihara, Ayako, Jurdan Mendiguchia, Takashi Ono, et al. "132 Neuromuscular responses of the hamstring and trunk muscles during unanticipated trunk perturbations." In IOC World Conference on Prevention of Injury & Illness in Sport 2021. BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine, 2021. http://dx.doi.org/10.1136/bjsports-2021-ioc.123.

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Kusumaningtyas, Mei, and Herdianty Kusuma Handari. "Assessment of Low Back and Hamstring Muscle Flexibility Among Students of Physiotherapy Department at Health Polytechnics Surakarta." In The 7th International Conference on Public Health 2020. Masters Program in Public Health, Universitas Sebelas Maret, 2020. http://dx.doi.org/10.26911/the7thicph.05.13.

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ABSTRACT Background: Lack of physical activity, coupled with long sitting positions in students, can cause muscle shortening, resulting in decreased flexibility that will interfere with daily activities. In these conditions, there is no data on flexibility due to reduced physical activity in students, so this study aims to identify the level of flexibility among students of the Surakarta Health Polytechnic Physiotherapy. Subjects and Method: This was a quantitative descriptive study carried out students majoring in physiotherapy at School of Health Polytechnic, Surakarta from august to Septemb

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Yang, Hongzhi, Yi-Chun Li, and Mohamed Samir Hefzy. "Isometric Co-Contractions of the Quadriceps and Hamstrings in Intact and PCL-Deficient Knees." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0445.

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Abstract The exercises to strengthen the muscles around the knee are designed to improve its stability. During these exercises, co-contraction of the hamstrings occur depending on the level of quadriceps contraction. The purpose of this study is to develop a three-dimensional knee model that includes tibia, femur and patella and allows to predict knee response due to quadriceps and hamstrings co-contractions. As an application, results quantifying the changes in knee response are obtained following a simulated posterior cruciate ligament (PCL) injury. This is motivated by the continuing debate

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Quatman, Carmen E., Ata M. Kiapour, Ali Kiapour, et al. "Effects of Quadriceps and Hamstrings Ratio on ACL Strain During Landing Activities." In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80672.

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Over 100,000 anterior cruciate ligament (ACL) injuries occur annually in the United States [1]. Of these, 70% are classified as non-contact, many of which occur subsequent to a landing from a jump [2]. While most agree that quadriceps (Q) and hamstrings (H) have a significant contribution in knee biomechanics, the role of quadriceps and hamstrings muscle loads and their ratio (Q/H) in ACL injury remains controversial. Understanding muscle recruitment in high risk activities may improve our knowledge of ACL injury mechanisms. Such insight may improve current prevention strategies to decrease th

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Hefzy, Mohamed S., Hongzhi Yang, Eihab M. Abdel-Rahman, and Mohamad Alkhazim. "Effects of Knee Flexion Angle and Quadriceps Contraction on Hamstrings Co-Contraction." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0270.

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Abstract Open and closed kinetic chain exercises are being used as knee rehabilitation regiments. These exercises are designed to strengthen the muscles around the knee in order to improve its stability. Following a knee injury and/or surgery, the patient is asked to perform an isometric contraction of the quadriceps as the very first task of the rehabilitation process. Co-contraction of the hamstrings may occur depending on the amount of quadriceps contraction and the angle of knee flexion at which this isometric contraction is performed. The purpose of this study is to determine the effects

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Caruntu, Dumitru I., Ricardo Moreno, and Robert Freeman. "Knee Muscle and Ligament Forces During Drop Landing Exercise." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-70982.

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This work investigates the human leg muscle and ligaments forces during a drop-landing exercise. An inverse dynamics 2-D model of human leg is used on this ballistic task in order to predict these forces. The model consists of three bony structures, namely femur, tibia, and patella. The joints of the model are the knee joint and the hip joint. The ligamentous structure of the knee includes the two cruciate ligaments, Anterior Cruciate Ligament (ACL) and the Posterior Cruciate Ligament (PCL), and the two collateral ligaments, Lateral Collateral Ligament (LCL) and Medial Collateral Ligament (MCL

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