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Askling, Carl. "Hamstring muscle strain". Doctoral thesis, Swedish School of Sport and Health Sciences, GIH, Laboratory for Biomechanics and Motor Control, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:gih:diva-425.
Pełny tekst źródłaBackground: Acute hamstring strains are common injuries in different sports. They are often serious, causing long rehabilitation times and a proneness for re-injury. Preliminary observations indicate that the injuries can be of at least two types, one occurring during high-speed running and the other during motions where the hamstring muscles reach extreme lengths.
Aims: To investigate the possible existence of different types of acute hamstring strains in two specific athletic groups, namely sprinters and dancers, as well as the generality of these findings in other sports.
Methods: In the first project, 18 sprinters and 15 dancers with acute first time hamstring strains were prospectively included. All subjects were examined, clinically and with magnetic resonance imaging (MRI), on 4 occasions after injury: at day 2-4, 10, 21 and 42. The follow-up period was 2 years. In the second project, 30 subjects from 21 different sports were prospectively included. All subjects were examined clinically and with MRI. The follow-up period lasted until the subjects returned to sport or finished their sport activity due to the injury.
Results: All sprinters sustained their injuries during competitive high-speed running. In contrast, all dancers encountered their injuries during slow-speed stretching type of exercises. The initial loss of strength and flexibility was significantly greater in sprinters than in dancers. At 42 days after injury, both groups could perform more than 90% of the test values of the uninjured leg. All the sprinters’ injuries were primarily located in biceps femoris long head, whereas the dancers’ injuries were mainly (87%) involving the proximal free tendon of semimembranosus. For the sprinters, involvement of the proximal free tendon, as estimated by MRI, and proximity to the ischial tuberosity, as estimated both by palpation and MRI, were associated with significantly longer time to return to pre-injury level. In the dancers, there were no significant correlations between clinical or MRI parameters and time to return to per-injury level. The time to pre-injury level was significantly longer (median 50 weeks, range 30-76) for the dancers compared to the sprinters (16, 6-50). In the second project, all injuries occurred during movements reaching a position with combined extensive hip flexion and knee extension. They were all located close to the ischial tuberosity and 83% involved the proximal free tendon of semimembranosus. Fourteen subjects (47%) decided to end their sport activity and for the remaining 16 subjects the median time back to sport was 31 (range 9-104) weeks. There were no significant correlations between clinical and MRI parameters and time to return to sport.
Conclusions: There seems to be a link between the injury situation and the two types of acute hamstring strain in sprinters and dancers with respect to clinical findings, injury location, muscles and tissues involved, and time to return to pre-injury level. Proximity of the injury to the ischial tuberosity, as estimated both by palpation and MRI, is associated with longer recovery time. Also in other sports, an injury situation where the hamstrings reach extensive lengths caused a specific injury to the proximal posterior thigh similar to that described in dancers. Due to the prolonged recovery time associated with this type of injury, correct diagnosis based on history, clinical and MRI investigation, and adequate information to the athletes are essential.
För att beställa tryckta exemplar av avhandlingen kontakta Carl Askling, carl.askling@gih.se
張劍強 i Kim-keung Cheung. "The effect of hamstring stretching technique on hamstring flexibility and isokinetic strength". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B3125715X.
Pełny tekst źródłaCheung, Kim-keung. "The effect of hamstring stretching technique on hamstring flexibility and isokinetic strength /". Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk:8888/cgi-bin/hkuto%5Ftoc%5Fpdf?B23425374.
Pełny tekst źródłaFernandes, 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.
Pełny tekst źródłaSiegel, Lori L. "Hamstring rehabilitation a systematic review /". Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5158.
Pełny tekst źródłaTitle from document title page. Document formatted into pages; contains vi, 98 p. : ill. (some col.). Includes abstract. Includes bibliographical references.
Sole, Gisela, i 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.
Pełny tekst źródłaSonnekalb, Sara. "Impact of different warm-up conditions on hamstring torque and power". Connect to this title online, 2005. http://www.oregonpdf.org.
Pełny tekst źródłaIncludes bibliographical references (leaves 38-44). Also available online (PDF file) by a subscription to the set or by purchasing the individual file.
Snyder, Alison Rose. "The acute influence of static and ballistic stretching on the biomechanics and muscle activity associated with the hamstring stretch /". See Full Text at OhioLINK ETD Center (Requires Adobe Acrobat Reader for viewing), 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=toledo1102522627.
Pełny tekst źródłaTypescript. "A dissertation [submitted] as partial fulfillment of the requirements of the Doctor of Philosophy degree in Exercise Science." Bibliography: leaves 72-77.
Whyte, Enda. "The influence of reduced hamstring muscle length on patellofemoral joint kinematics". Thesis, University of Strathclyde, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.502313.
Pełny tekst źródłaMuller, Brusco Clarissa. "Hamstring muscle architecture parameters in static and dynamic conditions using ultrasound imaging". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2022. https://ro.ecu.edu.au/theses/2571.
Pełny tekst źródłaEdupuganti, Pradeep. "Effect of resistance training in the improvement of hamstrings to quadriceps (H:Q) strength ratio in males and females". To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2008. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.
Pełny tekst źródłaSmink, Kyle Andrew. "The effects of hamstring delayed onset muscle soreness on functional knee joint stability". [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0001500.
Pełny tekst źródłaManiar, Nirav. "Muscle force contributions to knee joint loading". Thesis, Australian Catholic University, 2017. https://acuresearchbank.acu.edu.au/download/9092bf05e33ece328cba05aae3620898d48c8720b4140530a2b8df8e1bb03e24/6002615/MANIAR_2017_Muscle_force_contributions_to_knee_joint.pdf.
Pełny tekst źródłaBourne, Matthew N. "Hamstring strain injury: The role of strength and voluntary activation". Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/98262/4/Matthew_Bourne_Thesis.pdf.
Pełny tekst źródłaYelizarov, Nikolay. "The effect of electrical intramuscular stimulation on sub acute and chronic hamstring muscle strain injuries". Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/202.
Pełny tekst źródłaBaker, 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/.
Pełny tekst źródłaWillhoit, Kristin Florence. "Effect of ankle position on hamstring strength during maximum and submaximum leg curls". [Pensacola, Fla.] : University of West Florida, 2007. http://purl.fcla.edu/fcla/etd/WFE0000048.
Pełny tekst źródłaJennings, 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.
Pełny tekst źródłaBarreira, P. A. "The role of acceleration related variables for hamstring muscle (re-) injury prevention in elite association football". Thesis, Liverpool John Moores University, 2017. http://researchonline.ljmu.ac.uk/5761/.
Pełny tekst źródłaDombroski, 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.
Pełny tekst źródłaLangford, Nancy Jane. "The Relationship of the Sit and Reach Test to Criterion Measures of Hamstring and Back Flexibility in Adult Males and Females". Thesis, North Texas State University, 1987. https://digital.library.unt.edu/ark:/67531/metadc501137/.
Pełny tekst źródłaLindbäck, Kristoffer. "ACL reconstruction with a hamstring graft, can a forced foot dorsiflexion alter isokinetic knee flexion performance - a pilot study". Thesis, Luleå tekniska universitet, Hälsa och rehabilitering, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-74642.
Pełny tekst źródłanej
Snyder, Alison R. "The acute influence of static and ballistic stretching on the biomechanics and muscle activity associated with the hamstring stretch". University of Toledo / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1102522627.
Pełny tekst źródłaGraham, Daniel Joseph. "The Long Term Effects of Short-Wave Diathermy and Long-Duration Static Stretch on Hamstring Flexibility". Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd624.pdf.
Pełny tekst źródłaMesser, Daniel J. "Anterior cruciate ligament reconstruction and the hamstrings: Implications for injury prevention and rehabilitation". Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/118578/2/Daniel_Messer_Thesis.pdf.
Pełny tekst źródłaGerman, Rachael M. "INHIBITORY KINESIO® TAPE APPLICATION TO THE HAMSTRING MUSCLE GROUP: AN INVESTIGATION OF ACTIVE RANGE OF MOTION AND PERCEIVED TIGHTNESS OVER TIME". Kent State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=kent1365289267.
Pełny tekst źródłaReynolds, 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.
Pełny tekst źródłaFondran, Kristine Marie. "THE EFFECT OF SURYA NAMASKARA YOGA PRACTICE ON RESTING HEART RATE AND BLOOD PRESSURE, FLEXIBILITY, UPPER BODY MUSCLE ENDURANCE, AND PERCEIVED WELL-BEING IN HEALTHY ADULTS". Cleveland State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=csu1220456637.
Pełny tekst źródłaReid, Duncan A. "The effects of acute and periodic stretching interventions on knee extension range of motion and hamstring muscle extensibility in individuals with osteoarthritis of the knee a thesis submitted in partial fulfilment for the degree of Doctor of Health Science, Auckland University of Technology, November 2008". Click here to access this resource online, 2008. http://hdl.handle.net/10292/647.
Pełny tekst źródłaComellini, Gianmarco. "Lo strappo muscolare degli ischiocrurali nello sportivo. L?efficacia della fisioterapia nella prevenzione delle recidive: revisione sistematica della letteratura". Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019.
Znajdź pełny tekst źródłaEvangelidis, Pavlos. "Hamstrings muscle anatomy and function, and implications for strain injury". Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/18033.
Pełny tekst źródłaAl-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/.
Pełny tekst źródłaVoukelatos, Dimitrios. "Mathematical description of in-vivo muscle function". Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/21772.
Pełny tekst źródłaWestdorp, Clayton Mathew. "The Influence of Focal Knee Joint Cooling on Thigh Neuromechanical Function". University of Toledo / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1556626975273872.
Pełny tekst źródłaJones, Robert Ian. "The influence of soccer-specific fatigue on the risk of thigh injuries in amateur black African players". Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1001841.
Pełny tekst źródłaTafazzoli, 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.
Pełny tekst źródłaLaw, Roberta Yu Wai. "Effects of a three-week hamstrings stretch program on muscle extensibility and stretch tolerance in patients with chronic musculoskeletal pain". University of Sydney, 2009. http://hdl.handle.net/2123/5420.
Pełny tekst źródłaBackground: Physical deconditioning is often associated with chronic pain and is believed to be a result of gradual movement inhibition and reduction of physical activities. It is common for chronic pain sufferers to present with limited muscle extensibility and poor tolerance to physical movement. Exercises are therefore prescribed to assist in regaining muscle extensibility, strength, fitness and endurance. Of particular interest is stretch, a type of exercise aimed at increasing muscle extensibility. Stretch is commonly prescribed as part of physical rehabilitation in pain management programs, yet little is known of its effectiveness in the chronic pain population. Aim: The aim of this randomised controlled trial was to investigate the effects of a three-week stretch program on muscle extensibility and stretch tolerance in patients with chronic musculoskeletal pain. Methods: Thirty adults with pain persisting for at least three months and limited hamstring muscle extensibility were recruited from patients enrolled in a multidisciplinary pain management program at a Sydney Hospital. A within-subject design was used, with one leg of each participant randomly allocated to an experimental (stretch) condition and the other to a control (no stretch) condition. The hamstring muscles of the experimental leg were stretched for one minute a day over a three-week period, whilst the hamstring muscles of the control leg were not stretched during this time. This intervention was embedded within a pain management program and supervised by physiotherapists. Primary outcome measures were muscle extensibility and stretch tolerance, reflected by passive hip flexion angles produced with standardised and non-standardised torques, respectively. Initial measures were taken prior to the first stretch on day one and final measures were taken one to two days after the last stretch. A blinded assessor was used for all testing. Results: After three weeks of intervention, stretch did not increase muscle extensibility (mean between-group difference in hip flexion was 1 degree; 95% CI -2 to 4 degrees) but did improve stretch tolerance (mean between-group difference in hip flexion was 8 degrees; 95% CI 5 to 10 degrees). Conclusion: Three weeks of stretch increases tolerance to the discomfort associated with stretch but does not change muscle extensibility in patients with chronic musculoskeletal pain. This study provides support for the ongoing incorporation of stretch in pain management programs, where stretch may be conceptualised as a graded exposure to movement and assisting in the restoration of normal activity and function.
Svensson, Felicia. "The loaded barbell squat: Muscle activation with the barbell in a free compared to a fixed vertical movement path in healthy athletes". Thesis, Umeå universitet, Avdelningen för fysioterapi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-175878.
Pełny tekst źródłaIntroduktion: Knäböj med skivstång är en av de mest populära övningarna bland idrottare och kan utföras på många olika sätt för att uppnå olika mål. Skillnaden i muskelaktivering mellan fri och fixerad vertikal rörelsebana (med Smithmaskin) har inte undersökts i särskilt stor omfattning. Syfte: Att undersöka skillnader i muskelaktivering av sätes- och lårmuskler vid utförande av knäböj med skivstång i en fri jämfört med en fixerad vertikal rörelsebana hos friska idrottare under standardiserade förhållanden. Metod: Upprepade mätningar inom individer användes. Fem repetitioner knäböj per betingelse utfördes på en vikt som motsvarade 100% av deltagarnas egna kroppsvikt. Varje repetition genomfördes på fyra sekunder. Muskelaktivitet mättes med EMG-byxorna MBody3. Båda betingelserna testades under samma dag och deltagarna randomiserades till vilken förutsättning de skulle börja med. Resultat: Ingen skillnad observerades mellan betingelserna för medelvärdet av muskelaktiveringen under hela knäböjen. Mm. quadriceps och mm. hamstrings hade signifikant högre muskelaktivering i slutet av den excentriska och början av den koncentriska fasen av knäböjen då den utfördes i en fri rörelsebana. Ingen skillnad observerades, varken i hela eller delar av knäböjen, avseende m. gluteus maximus. Slutsats: Denna studie ger preliminära bevis på att muskelgrupperna mm. quadriceps och mm. hamstrings uppvisar lägre muskelaktivering i delar av knäböjen när den utförs i en Smithmaskin. Ingen signifikant skillnad observerades i muskelaktiveringen avseende hela rörelsen.
Gustavsson, Robert, i Fredrik Eklund. "Styrkeförhållandet mellan knäflexorer och knäextensorer". Thesis, Mälardalens högskola, Akademin för hälsa, vård och välfärd, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-12205.
Pełny tekst źródłaBackground: The kneeflexor and kneextensor muscle strength ratio (F/E ratio) is a widely researched area where isokinetic tests are often used. There seems to be little consensus regarding the optimal ratio and also whether a low ratio increase the risk of injury. It would be interesting from a preventive and rehabilitative stand point if an optimal ratio could be decided upon. Objectives: To compare the F/E ratio between a group of 16-25 year old soccer players and a group of physically active males. Methods: Isokinetic maximal strength in kneeflexors and kneextensors were measured with Genesis Single. Results: The ratio of the soccer players was 78,2 % in the right leg and 77 % in the left. The comparison group was found to have a ratio of 73,7 % in the right leg and 76,4 % in the left leg. There were no significant differences between the two groups. Conclusions: No significant differences could be determined between the two groups. Genesis Single needs to be further investigated with regards to its reliability and validity.
Troubridge, Michael A. "The effect of foot position on quadriceps and hamstrings muscle activity during a parallel squat exercise". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ58097.pdf.
Pełny tekst źródłaLaw, Roberta. "Effects of a three-week hamstrings stretch program on muscle extensibility and stretch tolerance in patients with chronic musculoskeletal pain". Connect to full text, 2009. http://hdl.handle.net/2123/5420.
Pełny tekst źródłaTitle from title screen (viewed September 25, 2009) Submitted in fulfilment of the requirements for the degree of Master of Philosophy to the Faculty of Medicine. Includes bibliographical references. Also available in print form.
Thompson, William Kevin. "T2 Mapping of Muscle Activation During Single-Leg Vertical Jumping Exercise". Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1194982561.
Pełny tekst źródłaRösemann, 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.
Pełny tekst źródłaLord, Cameron. "Lower Limb Fatigue Asymmetry of Preferred and Non-Preferred Legs after a Repeated-Sprint Test in Football Players with Previous Hamstring Injury". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2014. https://ro.ecu.edu.au/theses/1421.
Pełny tekst źródłaMoretti, Giacomo. "Il rinforzo muscolare eccentrico in prevenzione agli infortuni ai muscoli ischio-crurali: revisione basata sull'evidenze". Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18264/.
Pełny tekst źródłaBehan, Fearghal. "Neuromechanics of explosive performance for movement control and joint stabilisation". Thesis, Loughborough University, 2017. https://dspace.lboro.ac.uk/2134/28123.
Pełny tekst źródłaRodrigues, Ana Carolina de Mello Alves 1985. "Análise do desempenho muscular do quadríceps e dos isquiotibiais em função da série temporal e da amplitude de movimento de atletas amadoras de futsal feminino = Analysis of muscle performance of the quadriceps and hamstrings as a function of the times series and range of motion of amateurfemale futsal athletes". [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/275093.
Pełny tekst źródłaDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Educação Física
Made available in DSpace on 2018-08-22T12:25:32Z (GMT). No. of bitstreams: 1 Rodrigues_AnaCarolinadeMelloAlves_M.pdf: 2144136 bytes, checksum: d441e8c33daa046aa1f2cfd67d18b720 (MD5) Previous issue date: 2013
Resumo: A análise do desempenho muscular por dinamometria hipocinética comumente utiliza-se de valores de torque máximo de quadríceps e isquiotibiais. Porém com a utilização dos valores de torque em função da amplitude de movimento, bem como o cálculo da potência e do desequilíbrio muscular desta maneira torna possível observar o comportamento muscular e a capacidade de estabilização do joelho ao longo de toda amplitude de movimento, e possibilita identificar amplitudes que há risco de lesão de LCA. O objetivo deste estudo foi analisar a série temporal da produção de torque do quadríceps e dos isquiotibiais e calcular a potência e o desequilíbrio muscular de atletas de futsal feminino em função do ciclo de movimento de flexão e extensão do joelho no membro dominante. A amostra foi composta de 19 atletas amadoras de futsal feminino, com idade média de 20 ± 2,83 anos. A avaliação consistiu em 2 série de 5 repetições máximas de extensão/flexão do joelho unilateral de forma concêntrica, em 2 velocidades angulares (180°·s-1 e 210°·s-1) através de um dinamômetro isocinético (Biodex System Pro4). As análises foram baseadas nos valores de torque e potencia do quadríceps e dos isquiotibiais em função da amplitude de movimento, e foram calculadas a razão entre essas musculaturas em função da amplitude de movimento. Foram comparados os valores de torque, potência e razão em função do ângulo do joelho, para ambas as velocidades através da ANOVA e teste de Tukey post hoc. As variáveis foram analisadas em rotinas de ambiente Matlab®, com o valor de significância de 5%. Os valores de torque e potencia do quadríceps apresentaram-se maiores de 40% a 80% do ciclo de movimento nas velocidades de 180°·s-1 e 210°·s-1 que corresponde aos ângulos de 50° a 70° de flexão do joelho. Os valores do torque dos isquiotibiais foram maiores de 80% a 100 % do ciclo, que corresponde aos ângulos de 70° a 80° de flexão do joelho em ambas as velocidades, enquanto que a potencia dos isquiotibiais foi constate até 70% do ciclo, com menores valores de 70% a 100% do ciclo, que corresponde aos ângulos de 65° a 80° de flexão do joelho. Com relação a razão em função do ciclo de movimento, 6 atletas apresentaram em algum instante do ciclo de movimento valores abaixo de 60% na velocidade de 180°·s-1, e 4 atletas a 210°·s-1. O estudo mostra que análise do torque, potência e razão ao longo do ciclo de movimento caracteriza melhor o desempenho muscular destas atletas e identifica desequilíbrios entre isquiotibiais e quadríceps que poderiam não ser encontrados com o método de análise convencional, além de fornecer informações sobre desempenho em ângulos específicos do movimento de flexão e extensão do joelho que podem ser utilizados no treinamento e reabilitação destes grupos musculares
Abstract: The analysis of the muscle performance by isokinetic dynamometry is commonly used by peak torque of quadriceps and hamstrings. However, with the use of the torque values as a function of the amplitude of motion, as well as the calculation of the power and muscle imbalance in this way makes it possible to observe the behavior and the ability muscular stabilization of the knee over the entire range of motion, and helps identify amplitudes there is risk of ACL injury. The aim of this study was to analyze the time series of the torque production of the quadriceps and hamstrings and calculate power and muscle imbalance of female soccer athletes due to the cycle of movement of flexion and knee extension limb dominant. The sample consisted of 19 athletes amateur futsal, mean age 20 ± 2.83 years. The evaluation consisted of two series of five repetitions maximum extension / flexion of the knee-sided concentrically in two angular velocities (180°·s-1 e 210°·s-1) using an isokinetic dynamometer (Biodex System Pro4) . The analyzes were based on the values of torque and power of the quadriceps and hamstrings due to the range of motion, and we calculated the ratio of these muscles due to the range of motion. We compared the values of torque, power and reason as a function of knee angle for both speeds by ANOVA and Tukey post hoc. The variables were analyzed in Matlab ® routines, with the significance level of 5%. The values of torque and power of the quadriceps were higher than 40% to 80% of the cycle of motion at speeds of 180°·s-1 and 210°·s-1 which corresponds to angles of 50° to 70 ° of flexion knee. The hamstring torque values were greater than 80% to 100% duty cycle, corresponding to angles of 70° to 80° of knee flexion at both speeds, whereas the power hamstring muscles were finds up to 70% of the cycle, lower ratios of 70% to 100% duty cycle, corresponding to angles of 65° to 80° of knee flexion. Regarding the ratio as a function of the movement cycle 6 athletes had at some point in the movement cycle values below 60% at a rate of 180°·s-1 and athletes 4 at 210°·s-1. The study shows that analysis of the torque, power and reason throughout the movement cycle is a better muscle performance of athletes identifies imbalances between hamstring and quadriceps that could not be found with the conventional method of analysis, in addition to providing information about performance specific angles of flexion and extension of the knee that can be used in the training and rehabilitation of such muscle groups
Mestrado
Biodinamica do Movimento e Esporte
Mestra em Educação Física
McRae, Sheila MB. "Hamstring tendon harvest for ACL reconstruction: impact on muscle and function". 2014. http://hdl.handle.net/1993/23537.
Pełny tekst źródłaVennard, Kimberly J. "The effects of massage on hamstring flexibility". 2005. http://www.oregonpdf.org.
Pełny tekst źródłaIncludes bibliographical references (leaves 38-44). Also available online (PDF file) by a subscription to the set or by purchasing the individual file.
Lewis, Matthew. "Hamstring muscle activation differences between gender while performing single leg landings". 2010. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1474571.
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