Academic literature on the topic 'Musculus triceps surae'
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Journal articles on the topic "Musculus triceps surae"
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Shaikhutdinov, I. I., and A. M. Eremeev. "Electroneuromyographic investigations in patients with deforming arthrosis of the hip and knee joints." Kazan medical journal 74, no. 2 (April 15, 1993): 95–97. http://dx.doi.org/10.17816/kazmj64630.
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The changes of the functional state of spinal centers and muscles (musculus quadriceps femoris and musculus triceps surae) are detected, when observing 8 healthy subjects and 16 patients with gonand coxarthrosis. Centers or center-controlled muscles suffer to a large extent depending on the occurrence of the joint affections.
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Peschterliev, N., and N. Natschev. "Korrektur der Spitzfußkomponente beim angeborenen Klumpfuß durch Befreiung des Musculus triceps surae und tibiocalcaneare Distraktion." Zeitschrift für Orthopädie und ihre Grenzgebiete 126, no. 04 (March 18, 2008): 413–15. http://dx.doi.org/10.1055/s-2008-1044460.
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Rensing, N., A. Westermann, D. Möller, and H. von Piekartz. "Trainingseffekte eines reaktiven Sprungkrafttrainings bei Handballern in Bezug auf die Sprunghöhe und die Kraftentfaltung des Musculus triceps surae." Sportverletzung · Sportschaden 29, no. 04 (November 18, 2015): 236–43. http://dx.doi.org/10.1055/s-0041-106947.
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Waldrop, T. G., and R. W. Stremel. "Muscular contraction stimulates posterior hypothalamic neurons." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 256, no. 2 (February 1, 1989): R348—R356. http://dx.doi.org/10.1152/ajpregu.1989.256.2.r348.
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Recent studies have suggested that the subthalamic locomotor region (STLR) of the posterior hypothalamus is involved in modulating cardiorespiratory responses to feedback from contracting muscles. The purpose of this study was to determine whether neurons in this hypothalamic region alter their discharge frequency during contraction of hindlimb muscles. Stainless steel electrodes were used to record single-unit activity of STLR neurons during static and rhythmic contractions of hindlimb muscles in anesthetized cats. Recordings were also made from neurons in areas outside but surrounding the subthalamic locomotor region. Contraction of the triceps surae muscles was induced by stimulation of the peripheral cut ends of the L7 and S1 ventral roots. Both static and rhythmic contractions of the triceps surae evoked an increase in the discharge rate of the majority of the STLR cells studied. Two types of excitatory responses were observed: 1) abrupt increases in discharge frequency at the onset of muscular contraction and 2) a delayed more gradual increase in firing. Most of the cells that responded to muscular contraction could be activated by mechanical probing of the triceps surae muscles. However, the changes in discharge frequency were unrelated to changes in arterial pressure occurring during muscular contraction. Most of the neurons located outside the STLR were slightly inhibited by or did not respond to muscular contraction. Thus input from contracting muscles exerts predominantly an excitatory effect on neurons in the posterior hypothalamus. These results are consistent with other studies which have concluded that this hypothalamic site is involved in influencing the cardiorespiratory responses to muscular contraction.
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Sánchez-Gómez, Rubén, Carlos Romero-Morales, Álvaro Gómez-Carrión, Blanca De-la-Cruz-Torres, Ignacio Zaragoza-García, Pekka Anttila, Matti Kantola, and Ismael Ortuño-Soriano. "Effects of Novel Inverted Rocker Orthoses for First Metatarsophalangeal Joint on Gastrocnemius Muscle Electromyographic Activity during Running: A Cross-Sectional Pilot Study." Sensors 20, no. 11 (June 5, 2020): 3205. http://dx.doi.org/10.3390/s20113205.
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Background: The mobility of the first metatarsophalangeal joint (I MPTJ) has been related to the proper windlass mechanism and the triceps surae during the heel-off phase of running gait; the orthopedic treatment of the I MPTJ restriction has been made with typical Morton extension orthoses (TMEO). Nowadays it is unclear what effects TMEO or the novel inverted rocker orthoses (NIRO) have on the EMG activity of triceps surae during running. Objective: To compare the TMEO effects versus NIRO on EMG triceps surae on medialis and lateralis gastrocnemius activity during running. Study design: A cross-sectional pilot study. Methods: 21 healthy, recreational runners were enrolled in the present research (mean age 31.41 ± 4.33) to run on a treadmill at 9 km/h using aleatory NIRO of 6 mm, NIRO of 8 mm, TMEO of 6 mm, TMEO of 8 mm, and sports shoes only (SO), while the muscular EMG of medial and lateral gastrocnemius activity during 30 s was recorded. Statistical intraclass correlation coefficient (ICC) to test reliability was calculated and the Wilcoxon test of all five different situations were tested. Results: The reliability of values was almost perfect. Data showed that the gastrocnemius lateralis increased its EMG activity between SO vs. NIRO-8 mm (22.27 ± 2.51 vs. 25.96 ± 4.68 mV, p < 0.05) and SO vs. TMEO-6mm (22.27 ± 2.51 vs. 24.72 ± 5.08 mV, p < 0.05). Regarding gastrocnemius medialis, values showed an EMG notable increase in activity between SO vs. NIRO-6mm (22.93 ± 2.1 vs. 26.44 ± 3.63, p < 0.001), vs. NIRO-8mm (28.89 ± 3.6, p < 0.001), and vs. TMEO-6mm (25.12 ± 3.51, p < 0.05). Conclusions: Both TMEO and NIRO have shown an increased EMG of the lateralis and medialis gastrocnemius muscles activity during a full running cycle gait. Clinicians should take into account the present evidence when they want to treat I MTPJ restriction with orthoses, and consider the inherent triceps surae muscular cost relative to running economy.
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Goulet, C., A. B. Arsenault, D. Bourbonnais, M. F. Levin, and M. Goyette. "Differential effects of tens on the muscular components of the human triceps surae." Electroencephalography and Clinical Neurophysiology 87, no. 2 (August 1993): S86. http://dx.doi.org/10.1016/0013-4694(93)91247-x.
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Willwacher, Steffen, Wolfgang Potthast, Markus Konrad, and Gert-Peter Brüggemann. "Effect of Heel Construction on Muscular Control Potential of the Ankle Joint in Running." Journal of Applied Biomechanics 29, no. 6 (December 2013): 740–48. http://dx.doi.org/10.1123/jab.29.6.740.
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The purpose of this study was to investigate the effect of heel construction on ankle joint mechanics during the early stance phase of running. Kinematic and kinetic parameters (ankle joint angles, angular velocities and joint moments, lever arms of ground reaction force, triceps surae muscle tendon unit lengths, and rates of muscle tendon unit length change) were calculated from 19 male subjects running at 3.3 m/s in shoes with different heel constructions. Increasing heel height and posterior wedging amplified initial plantar flexion velocity and range. The potential for a muscle to control the movement of a joint depends upon its ability to produce joint moments. Runners in this study showed decreased external eversion moments and an increase in eversion range. Maximum eversion angles were not significantly affected by shoe conditions. Without considerable tendon prestretch, joint moment generation potentials of triceps surae and deep plantar flexors might be inhibited due to rapid plantar flexion based on the force–velocity relationship. It could be speculated that increasing ankle inversion at heel strike could be a strategy to keep maximum eversion angles inside an adequate range, if joint moment generation potentials of deep plantar flexors are inhibited due to rapid plantar flexion.
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Archambault, J. M., T. J. Koh, W. Herzog, and D. A. Hart. "Experimental Animal Model to Study Muscle and Tendon Adaptations to Chronic Loading." Journal of Musculoskeletal Research 02, no. 04 (December 1998): 283–88. http://dx.doi.org/10.1142/s0218957798000287.
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The purpose of this short communication is to present an animal model that: (1) allows for controlled, quantifiable loading of muscle and tendon; and (2) can be used to evaluate the response of musculo-skeletal tissues to chronic loading. A loading apparatus was used to move the rabbit foot through any desired angular position and velocity, while continuously measuring moments about the transverse axis of the ankle. A stimulator was triggered at a pre-set location in the range of motion to produce a contraction of the triceps surae and plantaris muscles. Muscle forces measured with an Achilles tendon force transducer were found to correlate well with externally measured ankle extensor moments. The experimental setup was used to provide cyclic loads to the triceps surae and plantaris muscles and Achilles tendon of 16 rabbits for three loading sessions per week over the period of one to eleven weeks. The experimental model described here is appropriate for the systematic study of the adaptation of muscle and tendon to chronic loading because of the repeatability of the setup and the quantification of tissue loads.
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Bobbert, M. "Dependence of human squat jump performance on the series elastic compliance of the triceps surae: a simulation study." Journal of Experimental Biology 204, no. 3 (February 1, 2001): 533–42. http://dx.doi.org/10.1242/jeb.204.3.533.
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The purposes of this study were to determine the dependence of human squat jump performance on the compliance of series elastic elements (SEEs) of the triceps surae (consisting of the soleus and gastrocnemius) and to explain this dependence. Vertical squat jumps were simulated using an optimal control model of the human musculo-skeletal system. Maximum jump height was found for several values of triceps surae SEE strain at maximum isometric force (ε (0)). When ε (0) was increased from 1 to 10 %, maximum jump height increased by 8 cm. This was partly due to a higher work output of contractile elements (CEs) of the muscles, primarily of the soleus, and also partly to an increased efficacy of converting muscle work to energy contributing to jump height. The soleus produced more work at ε (0)=10 % because, as a result of SEE recoil, the CE covered its shortening range at lower velocity and hence produced more force. Efficacy was higher at ε (0)=10 % because a higher vertical velocity at take-off was achieved with a lower rotational energy of the body segments. This apparent discrepancy was explained by increased angular velocities of the shanks and feet, which have small moments of inertia, and decreased angular velocities of the thighs and trunk, which have larger moments of inertia. This redistribution of segmental contributions to the vertical velocity of the centre of mass was possible because the increased compliance of the triceps surae SEE enhanced the energy-buffering capacity of this muscle group and, thereby, allowed for a higher power output at the ankles. It seems that long compliant tendons in the plantar flexors are an elegant solution to the problem of maximizing jumping performance.
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Cattagni, Thomas, Vincent Gremeaux, and Romuald Lepers. "The Physiological Characteristics of an 83-Year-Old Champion Female Master Runner." International Journal of Sports Physiology and Performance 15, no. 3 (March 1, 2020): 444–48. http://dx.doi.org/10.1123/ijspp.2018-0879.
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Purpose: To examine the cardiorespiratory, muscular, and skeletal characteristics of an 83-year-old champion female master athlete (called DL in this study) who had set multiple world running records in the 80-to-84-year-old age group. Methods: Measures of maximal oxygen uptake, maximal heart rate, maximal isometric torque for knee extensor muscles, thigh and triceps surae muscle volumes, and bone mineral density (BMD) of the proximal femur region were evaluated. Based on previously published equations, physiological age was determined for maximal oxygen uptake, maximal heart rate, and maximal isometric torque. Muscle volumes for the dominant leg were compared with previously published sex- and age-matched data using z scores. For BMD, T score and z score were calculated. Results: DL had the highest maximal oxygen uptake (42.3 mL·min−1·kg−1) ever observed for a female older than 80 years of age, which gave her a remarkable physiological age (27 y). By contrast, she had a physiological age closer to her biological age for maximal isometric torque (90 y) and maximal heart rate (74 y). The z scores for thigh (0.4) and triceps surae (1.1) muscle volumes revealed that DL’s leg muscles were affected almost as much as her sex- and age-matched peers. The T score (−1.7) for BMD showed that DL had osteopenia but no osteoporosis, and the z score (0.7) showed that DL’s BMD was similar to that of females of the same age. Conclusion: This single case study shows that the remarkable cardiorespiratory fitness coupled with intensive endurance training observed in a female master athlete was not associated with specific preservation of her muscular and skeletal characteristics.
Dissertations / Theses on the topic "Musculus triceps surae"
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Rinaldo, Linda, and Irene Sigg. "Rehabilitering vid muskelbristningar i musculus Triceps Surae : En systematisk litteraturöversikt." Thesis, Mälardalens högskola, Akademin för hälsa, vård och välfärd, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-43044.
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Bakgrund: Muskelbristningar i vadmuskulaturen kan vara svårrehabiliterade varför fysioterapeuter, tillsammans med andra professioner, behöver kunskap om vilka rehabiliteringsmetoder som har starkast evidens. Samstämmighet saknas, därav intresset att kartlägga olika rehabiliteringsmetoder. Syftet med denna litteraturöversikt var att beskriva rehabiliteringsmetoder och eventuella rapporterade effekter i samband med muskelbristningar i musculus Triceps Surae samt beskriva studiekvalitet. Metod: Fem artiklar, tre RCT-studier och två observationsstudier, granskades utifrån syfte och frågeställningar och kvalitetsgranskades enligt SBU’s (Statens beredning för medicinsk och social utvärdering) granskningsmallar. Databassökningar gjordes i PubMed, Medline och CINAHL Plus. Resultat: Injektioner med trombocytrik plasma, is-behandling och kompression genomfördes som tillägg till ett grundläggande rehabiliteringsprogram. Huvudsakliga utfallsmått var återgång till sport/spel samt smärta. Studiekvaliteten bedömdes vara medelhög och evidensstyrkan begränsad. Slutsats: Rehabilitering vid muskelbristningar i vadmuskulaturen ger förkortad rehabiliteringstid varav PRICE (Protection, Rest, Ice, Compression, Elevation) är betydelsefullt i det initiala skedet. Kompression och injektion av trombocytrik plasma uppvisar positiv inverkan på rehabiliteringstiden på lång sikt, isbehandling visar ingen effekt på lång sikt. Resultatet indikerar att ökad ålder förlänger rehabiliteringstiden samt ökar risken för återfall. Området är i behov av fler randomiserade kontrollerade studier för att stärka evidensen inom området.
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Vieira, Amilton. "Pacote de gelo e imersão em água gelada afetam o desempenho muscular e a atividade eletromiográfica." Universidade Federal de São Carlos, 2012. https://repositorio.ufscar.br/handle/ufscar/1338.
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Previous issue date: 2012-03-30Universidade Federal de Sao Carlos
Although tissue cooling is widely used in the treatment of musculoskeletal disorders there is still controversy about its effects on muscular performance. It is important to study this issue since cooling is also combined with exercise. Objective. To compare the effects of ice pack and cold water immersion on the muscular performance parameters of plantar flexors and electromyography (EMG) activity of the triceps surae. Design. Subjects were randomly assigned treatment with either ice pack (n=20) or cold water immersion (n=21). Independent variables were cold modality (ice pack or cold water immersion), muscle action (isometric and concentric isokinetic, angular velocity of isokinetic test (60 and 120°/s) and measurement time (pre- and post-cooling). Dependent variables were skin temperature, muscular performance and EMG activity. Methods. The sample included 41 healthy men with a mean age of 22.15 (SD=2.89). In each group one of the two cold modalities was applied to the calf region for 20 minutes. Skin temperature, plantar flexors muscular performance parameters and EMG activity of the triceps surae were measured before and after cooling. Results. Ice pack increased isometric peak torque. Both cold modalities reduced EMG activity in both muscles during isometric contraction. Both cold modalities reduced peak torque and total work during isokinetic contraction at both velocities. Ice pack was more effective at reducing EMG activity in isokinetic contractions. Limitations. The examiner was not blinded regarding treatment group and the population included only young healthy participants. Conclusions. Ice pack and cold water immersion showed similar effects on muscular performance, which depends on the muscle action performed. Cooling decreased isokinetic performance and the ice pack increased isometric torque. The results suggest that caution is required when performing activities after cooling, especially tasks involving maximal isokinetic contractions.
Embora o resfriamento tecidual seja amplamente utilizado no tratamento de lesões músculo esqueléticas há ainda controvérsias sobre seus efeitos no desempenho muscular. Estudar esse aspecto é importante uma vez que o resfriamento também é utilizado associado a exercícios físicos. Objetivo: Comparar os efeitos do pacote de gelo e da imersão em água gelada sobre parâmetros do desempenho muscular dos flexores plantares e atividade eletromiográfica (EMG) do tríceps sural. Desenho: Foi realizado um estudo experimental com distribuição aleatória dos participantes em dois grupos de intervenção, pacote de gelo (n=20) e imersão em água gelada (n=21). As variáveis independentes foram grupo experimental (pacote de gelo ou imersão em água gelada), tipo de contração (isométrica ou isocinética concêntrica), velocidade angular do teste isocinético (60 e 120°/s) e tempo de mensuração (pré- e pós-resfriamento). Variáveis dependentes foram temperatura da pele, parâmetros de desempenho muscular e atividade EMG. Métodos: Quarenta e um homens saudáveis, com média de idade (DP) de 22,15 (2,89) anos participaram do estudo. Cada grupo recebeu uma das duas modalidades de resfriamento, aplicada sobre a região da panturrilha por 20 minutos. A temperatura da pele e parâmetros do desempenho muscular dos flexores plantares e da atividade EMG dos músculos sóleo e gastrocnêmio medial e lateral foram avaliados antes e imediatamente após o resfriamento. Resultados: O pacote de gelo causou aumento no pico de torque isométrico. A atividade EMG foi reduzida em ambos os músculos sóleo e gastrocnêmio pelas duas modalidades de resfriamento durante a contração isométrica. As duas modalidades de resfriamento reduziram o pico de torque e trabalho total na contração isocinética em ambas as velocidades avaliadas. De modo geral, o pacote de gelo foi mais efetivo para reduzir a atividade EMG na contração isocinética. Conclusões: O pacote de gelo e a imersão em água gelada mostram efeitos similares sobre o desempenho muscular, o qual é dependente a ação muscular realizada. O resfriamento muscular diminui o desempenho durante a contração isocinético e o pacote de gelo aumenta o torque isométrico. Os resultados sugerem cautela quando forem realizadas atividades dinâmicas após o resfriamento, especialmente durante contrações isocinéticas máximas.
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Silva, Willian da. "Efeito da suplementação com extrato de chá verde sobre o dano muscular e dor muscular de início tardio." Universidade Federal do Pampa, 2017. http://dspace.unipampa.edu.br:8080/jspui/handle/riu/3373.
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O extrato de chá verde possui potencial antioxidante e anti-inflamatório, que pode contribuir para recuperar o equilíbrio metabólico e estresse oxidativo pós-exercício intenso, colaborando assim para diminuir episódios de dor muscular de início tardio (DMIT). Neste estudo, buscamos determinar os efeitos da suplementação com extrato de chá verde sobre a DMIT, dano muscular e oxidativo e status antioxidante. Em um ensaio randomizado, triplo cego, placebo controle, 20 homens não treinados com idade média de 24 (±5) anos realizaram exercício para indução da DMIT no tríceps sural antes e depois de 15 dias de suplementação com extrato de chá verde (500 mg/dia) (GT, n=10) ou placebo (PL, n=10). A DMIT foi determinada pela escala visual analógica de dor (pré e pós-suplementação) antes, imediatamente após e 48 horas após o exercício. Amostras sanguíneas foram tomadas para determinar marcadores bioquímicos de dano muscular como creatina quinase (CK), lactato desidrogenase (LDH) e marcadores de estresse oxidativo como níveis de malondialdeido (TBARS), produção de espécies reativas de oxigênio (DCFH-DA), juntamente com a carbonilação de proteínas e status antioxidante como capacidade antioxidante total do plasma (FRAP) e atividade da glutationa (GSH) além da atividade da acetilcolinesterase (AChe). O exercício induziu DMIT e a suplementação com GT reduziu um marcador de dano estrutural (CK), mas não atenuou a DMIT e marcadores de estresse oxidativo e status antioxidante. Este efeito protetivo ao dano estrutural interessa especialmente ao uso desta suplementação como possível fator adjunto para a prevenção de dano muscular e auxílio na recuperação de esforços intensos.
Green tea extracts supplementation (GT) is recognized as a source of antioxidants and anti-inflammatory substances that may contribute to the recovery after intense exercise when muscle soreness (MS) occurs. In this study we determine the effects of GT on MS, muscle damage, oxidative stress and antioxidant status. Here we present a randomized trial triple blind placebo control including 20 adults aged 25 (5) years and physically active that underwent sessions exercise for induction of muscle damage in the triceps sural before and after 15 days of supplementation with GT at dose of 500 mg/day (GT, n=10) or placebo (PL, n=10). MS was determined using a visual analogic scale. Blood samples were collected to determination of biochemical markers of damage considering activity of creatine kinase (CK) and lactate dehydrogenase (LDH), oxidative stress considering levels of malondialdehyde (TBARS), reactive species of oxygen (DCFH), protein carbonylation, and antioxidant status considering total antioxidant capacity (FRAP), glutathione activity (GSH), and acetylcholinesterase (AChE) activity. Exercise induced MS and GT reduces a marker of structural muscle damage without effects on oxidative stress and antioxidant status. This protective effect may be support the use of this supplementation as a possible correlate strategy to prevent muscle damage and therefore contribute to the recovery of intense exercise.
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Portero, Pierre. "Adaptation du muscle humain à la microgravité simulée : apport de l'analyse spectrale du signal EMG." Compiègne, 1993. http://www.theses.fr/1993COMP566S.
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Les modifications des paramètres spectraux du signal électromyographique de surface (EMGS) des muscles Triceps Surae (T. S. ) et Tibialis Anterior (T. A. ), au cours d'une épreuve de fatigue isométrique, sont étudiées en relation avec une situation de microgravité simulée chez l'homme, c'est-à-dire lors d'une période de Bed Rest (B. R. ). La revue de la littérature a permis de montrer que : d'une part, lors d'une période de microgravité réelle ou simulée, les muscles à fonction antigravitaire (T. S) sont plus affectés que les muscles à fonction phasique (T. A. ) ; d'autre part, les paramètres spectraux EMGS évoluent différemment lors d'épreuves de fatigue et ceci en fonction de leurs caractéristiques métaboliques musculaires. L'étude a comporté deux phases principales : la première a consisté en la validation du protocole expérimental, la caractérisation des réponses des différents muscles en terme d'évolution des paramètres spectraux EMGS, et l'établissement d'une relation entre ces paramètres spectraux et certains paramètres du métabolisme musculaire exploré par spectroscopie RMN 31P ; la deuxième a été de caractériser l'évolution des paramètres spectraux EMGS en fonction du statut fonctionnel du T. S. Et du T. A. Lors d'une période de B. R. (4 semaines), avec et sans contre-mesures d'exercice musculaire. Les résultats montrent que : grâce à la méthode proposée (épreuve isométrique à 50% de la force maximale volontaire et analyse spectrale du signal EMGS), il est possible de différencier les évolutions des muscles en fonction de leur résistance à la fatigue grâce à l'établissement d'un débit de la fréquence moyenne (MPF) du spectre EMGS (% de diminution de la valeur initiale de la MPF par minute de temps de contraction). Ce débit constitue un index de fatigabilité d'un point de vue EMGS : il existe une relation entre le glissement spectral vers les basses fréquences de L'EMGS et la concentration musculaire en H2PO4 d'une part et H+ d'autre part ; il est possible de différencier ces évolutions par rapport à une situation de microgravité simulée, les différents chefs musculaires du T. S. (les gastrocnemii et le soleus) présentant une augmentation du débit de MPF contrairement au T. A. ; et enfin, lorsqu'un entraînement musculaire est non spécifique de la fonction des muscles étudiés, celui-ci n'est pas suffisant pour contrecarrer les effets du déconditionnement exprimés en terme EMGS. En conclusion, l'analyse spectrale du signal EMGS, lors d'épreuves de fatigue isométrique, apparaît comme étant un outil fiable pour discriminer les muscles par rapport à leur fonction antigravitaire (ou non) et en situation de microgravité simulée. L'aspect non invasif de cette méthode en fait une technique de choix pour le suivi de l'adaptation du muscle dans les domaines de la physiologie spatiale, sportive et de la médecine
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Roux, Anthony. "Modélisation par la Méthode des Eléments Discrets de la Déchirure du Complexe Musculo-Tendineux." Thesis, Paris, ENSAM, 2016. http://www.theses.fr/2016ENAM0023/document.
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La déchirure musculaire est la première cause de blessure chez les athlètes. De nombreuses études décrivent ce traumatisme musculaire sans parvenir à en identifier clairement la chronologie et ses circonstances. L’objectif de la thèse est de décrire le phénomène de déchirure musculaire avec la méthode des éléments discrets, en s’appuyant sur des essais expérimentaux pour valider les modèles numériques. Dans une première partie, une revue de littérature permet d’acquérir les propriétés mécaniques des différents éléments constituant le complexe musculo-tendineux afin de pouvoir en réaliser un modèle macroscopique. Dans une deuxième partie, la modélisation du complexe musculo-tendineux est réalisée. La validation du comportement mécanique en traction passive du modèle proposé est réalisée en comparaison des travaux de L-L. Gras sur le muscle sternocléidomastoïdien humain. L’influence des paramètres morphologiques sur le comportement mécanique global est ensuite étudiée. La rupture fait l’objet de la troisième partie. Une modélisation de l’ensemble {tendon d’Achille/triceps sural} est réalisée et soumise à un test de traction passif jusqu’à rupture. La validation des résultats est faite vis-à-vis des essais expérimentaux réalisés sur cet ensemble musculaire provenant de pièces anatomiques humaines. L’étape suivante s’attache à modéliser la contraction musculaire, implémentée au niveau des fibres musculaires. Une validation du comportement actif du complexe musculo-tendineux est réalisée. Cette dernière étape, combinée à la traction destructive permet d’étudier la faisabilité de modéliser la déchirure par la méthode des éléments discrets, mais également d’étudier les structures endommagées et les mécanismes de rupture. Cela ouvre des possibilités d’utilisation cliniques de ce modèle pour comprendre et prévenir des blessures par déchirure musculaireTearing of the muscle-tendon complex is a common sport-related injury for athletes. Many studies reported description of this traumatism but mechanisms leading to such an injury are still unclear as are the site of mechanical failure and involved structures. The aim of the thesis is to describe the phenomenon of the muscle-tendon-complex’s tear using the discrete element method and validating the numerical model with experimental data. In the first part, a literature review explains the different properties of the muscle-tendon complex main components’ in order to model it at the macroscopic scale. In the second part, the muscle-tendon complex is modeled. Validation of the mechanical behavior in passive tensile test is proposed by comparison with experimental data from L.-L. Gras on human sternocleidomastodeus muscle. Then, the different influences of morphometric parameters on the mechanical behavior of the complex are investigated. The third part focuses on the rupture. A model of the complex set of {Achilles tendon/surae triceps} is built and a tensile test until rupture is applied. Model validity is assessed by comparison with in vitro experiments from human cadavers. The fourth part focuses on the muscular activation, implemented inside fibers’ behavior. Validity of its active behavior is investigated. This fifth and last presents the enrichment with destructive tensile test. This added test allows first to study the feasibility to model the tear with the discrete element method; and second to focus on damaged structures and rupture’s mechanisms. This offers possibilities for clinical applications of this model to understand and prevent injuries caused by a tear of the muscle-tendon complex
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Obyt, Daniel. "Vliv frekvence bruslení na napětí svalu musculus triceps surae." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-347647.
Full textAbstract:
Title: The influence of skating frequency on muscle tone of musculus triceps surae. Objective: The aim of this master degree thesis is to determine whether and how much influence the frequency and intensity of isotonic load the muscle tone of musculus soleus during skating of a professional ice hockey player. The muscle tone of musculus soleus is the most objectively measured part of musculus triceps surae by myotonometer. Methods: The master degree thesis is divided into the theoretical part, the processed form of research that serves as a basis for investigation in the second, empirical part. Change in muscle tone of musculus soleus was investigated by using myotonometer, which followed after a full physiotherapy examination. It is quantitative research using quasi-experimental study. Measurements were performed on 10 subjects - professional ice hockey players who are fully manage the technique of skating on the ice, before load, after low frequency isotonic load and after high frequency isotonic load. Conclusion: The myotonometric measurements revealed that after low and high frequency isotonic load of skating on ice rink, the muscle tone of musculus soleus is the same or slightly lower than before load. Keywords: Muscle tone, myotonometer, musculus soleus, skating, ice hockey
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Obyt, Daniel. "Vliv frekvence bruslení na napětí svalu musculus triceps surae." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-347922.
Full textAbstract:
Title: The influence of skating frequency on muscle tone of musculus triceps surae. Objective: The aim of this master degree thesis is to determine whether and how much influence the frequency and intensity of isotonic load the muscle tone of musculus soleus during skating of a professional ice hockey player. The muscle tone of musculus soleus is the most objectively measured part of musculus triceps surae by myotonometer. Summary: The master degree thesis is divided into the theoretical part, the processed form of research that serves as a basis for investigation in the second, empirical part. Change in muscle tone of musculus soleus will be investigated by using myotonometer, which will follow after a full physiotherapy examination. Measurements will be performed on 10 subjects - professional ice hockey players who are fully manage the technique of skating on the ice, before load, after low frequency isotonic load and after high frequency isotonic load. Conclusion: The myotonometric measurements revealed that after low and high frequency isotonic load of skating on ice rink, the muscle tone of musculus soleus is the same or slightly lower than before load. Keywords: Muscle tone, myotonometer, musculus soleus, skating, ice hockey
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Kupec, Karel. "Ovlivnění reologických vlastností svalové tkáně u musculus triceps surae pomocí AEK postupů." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-330075.
Full textAbstract:
Master's thesis topic: Influence of rheological characteristics of muscle tissue by musculus triceps surae by means of AEK practice Author: Bc. Karel Kupec Branch of study: Physiotherapy Disertation Tutor: PhDr. Petr Šifta, Ph.D. Year of Defense: 2013 Abstract: The target of this thesis was find out the effect of agistic-excentric contractions on muscle tension of musculus soleus compared with passive relaxation of musculus soleus. The assumption was, that agistic-excentric contraction reduce muscle tension of musculus soleus after anaerobic load. The contralateral lower limb was control limb for comparison agistic-excentric contraction and passive relaxation. Muscle tension was measured in laboratory in Faculty of Physical Education and Sport, Charles University: five students were measured. As a measurement method was used myotonometry, which simulated palpation. Measured data were displayed by using an analog-digital convertor and consequently evaluated. The results of this study found out positive effect of agistic-excentric contraction on muscle tension. Control form of relaxation, passive relaxation, didn't influence muscle tension so significantly. The results support the principle of hypotheses, that agisctic-exentric contraction approach affect muscle tension more positive than passive...
Conference papers on the topic "Musculus triceps surae"
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Kaplan, Aleš, Iva Hnátová, and Miloš Peca. "The Effect Of Kinesio Taping On The Result In The Standing Long Jump." In 12th International Conference on Kinanthropology. Brno: Masaryk University Press, 2020. http://dx.doi.org/10.5817/cz.muni.p210-9631-2020-45.
Full textAbstract:
This paper draws attention to a short-term experiment that aims to elucidate the effect of kinesio taping of the musculus triceps surae on performance in the standing long jump. We therefore dealt with an area that has not yet been suficiently explored. For this reason, our aim was to determine and evaluate the effect of the application of kinesio taping on muscle strength in the standing long jump and to make a comparison with the results without the use of kinesio taping. The musculus triceps surae was selected for testing. Thus, we assume that the application of facilitation kinesio taping to the musculus triceps surae will influence the probands’ performance in the standing long jump. The experiment was performed with a group of n=20 young probands, athletes aged 16.25 (± 0.76), without prior injury. In this context, we realise that we cannot generalise the results to cover the entire population, es-pecially to injured individuals or after an accident.