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Lemke, Shayna Marie. "Neuromuscular Performance and the Menstrual Cycle". Thesis, Montana State University, 2007. http://etd.lib.montana.edu/etd/2007/lemke/LemkeS0807.pdf.
Pełny tekst źródłaSouza, Kristopher Mendes de. "Fadiga neuromuscular e performance no domínio severo". reponame:Repositório Institucional da UFSC, 2017. https://repositorio.ufsc.br/xmlui/handle/123456789/180563.
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No ciclismo, a relação hiperbólica entre intensidade de exercício e tempo de exaustão (tlim) apresenta uma potência crítica (PC) e uma quantidade constante de trabalho que pode ser realizado acima da PC (W ). Alguns pressupostos dessa relação ainda não foram completamente testados e/ou confirmados. Dessa forma, os objetivos da presente tese foram: 1) investigar o efeito de duas diferentes taxas de utilização de uma mesma fração da W na magnitude de fadiga neuromuscular (redução do torque muscular pico); 2) investigar o efeito de duas diferentes taxas de utilização de uma mesma fração da W no tlim de um exercício subsequente realizado no domínio severo. A amostra foi composta por 17 sujeitos saudáveis do sexo masculino (25,6 ± 3,7 anos) que participaram voluntariamente. Para atender ao primeiro objetivo, o torque muscular pico dos sujeitos foi determinado por meio de um sprint isocinético all-out (cadência fixa de 120 rpm) em uma condição controle e após dois testes de carga constante programados para depletar 70% W em 3 e 10 min, respectivamente. Em adição, para atender ao segundo objetivo, os sujeitos realizaram dois testes de carga constante programados para depletar 70% W em 3 e 10 min seguidos por um teste até a exaustão na carga correspondente à PC + 10 W. O torque muscular pico nos testes de 3 min (108 ± 19 N.m) e 10 min (112 ± 23 N.m) foi significantemente reduzido (p < 0,05) em comparação à condição controle (135 ± 20 N.m). Contudo, não houve diferença entre as duas condições experimentais (p > 0,05). Por outro lado, o tlim na carga correspondente à PC + 10 W foi mais longo após o teste de 3 min (15,8 ± 6,4 min) que após o teste de 10 min (10,0 ± 6,8 min). Assim, com base nos resultados encontrados, pode ser concluído que a fadiga neuromuscular no domínio severo é independente da taxa de utilização da W quando o trabalho realizado acima da PC é o mesmo. Contudo, o tlim de um exercício severo pode ser prolongado quando é realizado após uma alta taxa de depleção da W . Isso significa que a magnitude da W pode ser aumentada dependendo da amplitude de variação da carga acima da PC.
Abstract : During cycling exercise, power output and time to exhaustion (tlim) describe a hyperbolic relationship, with an asymptote known as critical power (CP) and a fixed amount of work that can be performed above the CP (W ). Some assumptions of this relationship have not yet been fully tested and/or confirmed. Therefore, the aims of this thesis were: to investigate the effect of two different rates of utilization of the same fraction of W on 1) the magnitude of neuromuscular fatigue (reduction of peak muscle torque); and on 2) a tlim performed within the severe-intensity domain immediately following the first part of exercise. 17 healthy male subjects (25.6 ± 3.7 years) volunteered to participate in this study. Peak muscle torque was determined through an allout isokinetic sprint (cadence fixed at 120 rpm) in a control condition and after two constant power output tests set to deplete 70% W in 3 and 10 min, respectively. In addition, the subjects performed two constant power output tests set to deplete 70% W in 3 and 10 min, respectively, followed by a constant test at CP + 10 W performed to exhaustion. Peak muscle torque was significantly reduced (p < 0.05) after 3 min (108 ± 19 N.m) and 10 min (112 ± 23 N.m) tests compared to the control condition (135 ± 20 N.m). However, there was no significant difference between the two experimental conditions (p > 0.05). On the other hand, the tlim at CP + 10 W was significantly longer (p > 0.05) after the 3 min test (15.8 ± 6.4 min) compared to after the 10 min test (10.0 ± 6.8 min). In conclusion, neuromuscular fatigue in the severe-intensity domain is independent of the rate of utilization of W when the same work is accumulated above the CP. However, the tlim within the severe-intensity domain can be prolonged when performed after a fast rate of utilization of W which means that the magnitude of W can be increased depending on the amplitude of power output variation above the CP.
Taylor, Kristie-Lee. "Monitoring neuromuscular fatigue in high performance athletes". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2012. https://ro.ecu.edu.au/theses/581.
Pełny tekst źródłaBeyer, Kyle. "The Cross Education of Neuromuscular Economy". Master's thesis, University of Central Florida, 2014. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6244.
Pełny tekst źródłaM.S.
Masters
Child, Family and Community Sciences
Education and Human Performance
Sport & Exercise Science; Applied Exercise Physiology Track
Pinto, Nuno Miguel Mesquita Gomes. "Flexão ativa e passiva da coxo femoral e a sua relação com a performance neuromuscular". Bachelor's thesis, [s.n.], 2017. http://hdl.handle.net/10284/6235.
Pełny tekst źródłaIntrodução: A avaliação funcional é determinante para a prática da fisioterapia. O uso do teste de elevação do membro (TEMI) na posição supinada, de forma ativa e passiva, permite avaliar a funcionalidade da musculaturaposterior da coxa. Objetivo: Comparar o TEMI ativo e passivo, e de que forma este se correlacionaria com a performance neuromuscular. Metodologia: Análise cinemática do TEMI ativo e passivo, com captura de análise do movimento 3D através do Qualisys Oqus Camera Series (Qualisys), e avaliação da força da musculatura do joelho através do Dinamómetro Isocinético Byodex System 4 Pro™ (Byodex). Resultados: Na avaliação da comparação do TEMI ativo com o TEMI passivo, só se obteve uma diferença estatisticamente significativa (p=0,01), na amplitude máxima de teste, entre a abdução/adução realizada de forma ativa e passiva do membro inferior esquerdo.. Na avaliação da força isocinética, nenhum dos parâmetros avaliados teve uma diferença estatisticamente significativa não existindo qualquer correlação com o TEMI ativo e passivo. Conclusão: Não existem diferenças significativas entre o TEMI ativo e passivo, e os valores deste, não parecem influenciar a performance neuromuscular.
Introduction: Functional assessment is essential for physical therapy practice. The use of the lower limb elevation test (TEMI) in the supinated position, in an active and passive way, allows to evaluate the functionality of the posterior muscles of the thigh. Objective: To compare active and passive TEMI, and how this would correlate with neuromuscular performance. Methodology: Kinematic analysis of active and passive TEMI, with capture of 3D movement analysis through the Qualisys Oqus Camera Series (Qualisys), and evaluation of knee muscle strength through the Byodex System 4 Pro Is Isokinetic Dynamometer (Byodex). Results: In the evaluation of the comparison of the active TEMI with the passive TEMI, only a statistically significant difference (P = 0.01) was found in the maximal test amplitude between abduction/adduction of the left lower limb performed actively and passively. In the evaluation of isokinetic strength, none of the parameters evaluated had a statistically significant difference and there was no correlation with active and passive TEMI. Conclusion: There are no significant differences between active and passive TEMI, and their values do not seem to influence neuromuscular performance.
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Jones, Rebecca Louise. "The effect of β-alanine supplementation on neuromuscular performance". Thesis, Nottingham Trent University, 2017. http://irep.ntu.ac.uk/id/eprint/31892/.
Pełny tekst źródłaMacgregor, Lewis James. "Neuromuscular markers of high performance sport preparation : muscle contractile mechanics". Thesis, University of Stirling, 2016. http://hdl.handle.net/1893/24445.
Pełny tekst źródłaWalters-Edwards, Michelle. "Exercise-related sensorimotor and neuromuscular performance of the knee joint". Thesis, Bangor University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288129.
Pełny tekst źródłaNewell, Michael L. "Metabolic, neuromuscular, and performance responses to graded carbohydrate ingestion during exercise". Thesis, University of Stirling, 2015. http://hdl.handle.net/1893/22397.
Pełny tekst źródłaAlhajaya, Mohammed. "Exercise, neuromuscular control and performance, and stability of the knee joints". Thesis, Bangor University, 2004. https://research.bangor.ac.uk/portal/en/theses/exercise-neuromuscular-control-and-performance-and-stability-of-the-knee-joints(67ac5512-a776-42a9-8fe5-f727198582ad).html.
Pełny tekst źródłaSpiteri, Tania. "Neuromuscular and biomechanical characteristics of change of direction and agility performance". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2015. https://ro.ecu.edu.au/theses/1662.
Pełny tekst źródłaElnagar, Youssif Omran. "Sex differences in the functional hamstring to quadriceps ratio and neuromuscular performance". Thesis, University of Gloucestershire, 2012. http://eprints.glos.ac.uk/1952/.
Pełny tekst źródłaMinshull, Claire. "Neuromuscular performance and exercise stress associated with the stabilisation of synovial joints". Thesis, Bangor University, 2003. https://research.bangor.ac.uk/portal/en/theses/neuromuscular-performance-and-exercise-stress-associated-with-the-stabilisation-of-synovial-joints(1d6770b4-dfb4-442e-8878-097370702362).html.
Pełny tekst źródłaFurness, Trentham Phillip, i res cand@acu edu au. "Effects of Whole Body Vibration on Neuromuscular Performance of Community Dwelling Older Adults". Australian Catholic University. School of Exercise Science, 2007. http://dlibrary.acu.edu.au/digitaltheses/public/adt-acuvp153.29052008.
Pełny tekst źródłaWesterlund, T. (Tarja). "Thermal, circulatory, and neuromuscular responses to whole-body cryotherapy". Doctoral thesis, University of Oulu, 2009. http://urn.fi/urn:isbn:9789514290435.
Pełny tekst źródłaGage, Julie Prentice William E. "The acute effects of proprioceptive neuromuscular facilitation (PNF) stretching on selected performance parameters". Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2006. http://dc.lib.unc.edu/u?/etd,96.
Pełny tekst źródłaTitle from electronic title page (viewed Oct. 10, 2007). "... in partial fulfillment of the requirements for the degree of in the Department of Exercise and Sport Science (Athletic Training)." Discipline: Exercise and Sports Science; Department/School: Exercise and Sport Science.
Hsiao, Shih-Fen. "The neuromuscular and functional performance in stroke patients : the effect of physiotherapy intervention". Thesis, King's College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286541.
Pełny tekst źródłaWestblad, Niklas. "The effect of flywheel training on functional neuromuscular performance in physically active youth". Thesis, Gymnastik- och idrottshögskolan, GIH, Institutionen för idrotts- och hälsovetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:gih:diva-5422.
Pełny tekst źródłaFurness, Trentham Phillip. "Effects of whole body vibration on neuromuscular performance of community dwelling older adults". Thesis, Australian Catholic University, 2007. https://acuresearchbank.acu.edu.au/download/a2677b7f42a815849761091b9fb21dd77e66c6d192890da9f04aec3c63c61b80/2799749/64874_downloaded_stream_99.pdf.
Pełny tekst źródłaDe, Villiers Elsje. "Neuromuscular control and physical performance following anterior cruciate ligament reconstruction using a semitendinosus". Master's thesis, University of Cape Town, 2006. http://hdl.handle.net/11427/3011.
Pełny tekst źródłaKim, Jung-Yong. "Patterns of trunk neuromuscular performance in normal subjects and low-back pain patients /". The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487868114109762.
Pełny tekst źródłaCardinale, Marco, i Michael H. Stone. "Is Testosterone Influencing Explosive Performance?" Digital Commons @ East Tennessee State University, 2006. https://dc.etsu.edu/etsu-works/4614.
Pełny tekst źródłaFridén, Cecilia. "Neuromuscular performance and balance during the menstrual cycle and the influence of premenstrual symptoms /". Stockholm, 2004. http://diss.kib.ki.se/2004/91-7349-996-X/.
Pełny tekst źródłaWing, Annika Elisabeth. "The influence of pressure stimulus intensity on pain perception and neuromuscular performance in healthy males". Thesis, University of Northampton, 2013. http://nectar.northampton.ac.uk/8893/.
Pełny tekst źródłaDuan, Xu. "Influence of gender and obesity on motor performance, neuromuscular control and endurance in older adults". Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/91479.
Pełny tekst źródłaMS
Cormack, Stuart J. "Neuromuscular fatigue and endocrine responses in elite Australian Rules football players". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2008. https://ro.ecu.edu.au/theses/19.
Pełny tekst źródłaOverton, Amanda Julie. "Neuromuscular Fatigue and Biomechanical Alterations during High-Intensity, Constant-Load Cycling". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2013. https://ro.ecu.edu.au/theses/612.
Pełny tekst źródłaMorgan, P. "The effect of acute consumption of non-specific COX-inhibitors on neuromuscular fatigue and exercise performance". Thesis, University of Exeter, 2019. http://hdl.handle.net/10871/36529.
Pełny tekst źródłaSoo, Ding-Shun Jacky. "Influence of prior high intensity cycling at graded hypoxia on subsequent performance, neuromuscular and perceptual responses". Thesis, Soo, Ding-Shun Jacky (2020) Influence of prior high intensity cycling at graded hypoxia on subsequent performance, neuromuscular and perceptual responses. Masters by Research thesis, Murdoch University, 2020. https://researchrepository.murdoch.edu.au/id/eprint/59606/.
Pełny tekst źródłaNeves, Guilherme João Albernaz. "Efeitos agudos do alongamento no músculo e na performance muscular: revisão bibliográfica". Bachelor's thesis, [s.n.], 2012. http://hdl.handle.net/10284/3477.
Pełny tekst źródłaObjectivo: O objectivo deste projecto foi o de reunir artigos que estudassem os efeitos agudos do alongamento na performance e força máxima, permitindo assim, uma revisão bibliográfica. Metodologia: Foi feita uma pesquisa em bases de dados com a MEDLINE/Pubmed research, b-on, e PEDro, para artigos do ano de 2000 até à actualidade, na língua inglesa. Os artigos tinham que ser todos experimentais, e tinham que respeitar os termos usados na pesquisa. Foram excluídos os artigos que fugissem minimamente ao tema. Também o uso dos nomes de autores foi usado, como forma de pesquisa, para poder ter mais estudos sobre este tema. Resultados: Todos os artigos selecionados tiveram resultados idênticos, com provas de que um alongamento estático e por técnica de facilitação neuromuscular proprioceptiva (PNF) diminuíam a performance muscular e também a força máxima. Já um alongamento dinâmico tinha como efeito um aumento da força e da performance muscular. Conclusões: Idealmente, deverão ser usados como forma de aquecimento para actividade fisica, os alongamentos dinâmicos, e evitar usar alongamentos estáticos(protocolos prolongados) ou por PNF. Objective: The objective of this study was to gather articles that would study the effects of stretching in muscle performance and in maximal voluntary force. Methods: A search in databases like MEDLINE/Pubmed research, b-on, and PEDro were made, for articles from the year 2000 to the present day, in the English language. The articles had to be experimental and all had to respect the terms used in the research. All who did not respect the study’s topic were excluded. Further on the research, names of authers were used, in order to bet access to more articles of the same subject. Results: All articles had identical results, proving that static ou PNF stretching could diminish performance and maximal voluntary force. As for dynamic stretch, improvements in performance and force are achieved. Conclution: Idealy, dynamic stretchs should be used as a warm up for physical activities, avoiding the use of static or PNF stretching.
Stevenson, Deja Lee. "Whole-Body Vibration and Its Effects on Electromechanical Delay and Vertical Jump Performance". Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd867.pdf.
Pełny tekst źródłaCunha, Ronaldo Alves da [UNIFESP]. "Fototerapia e estimulação elétrica neuromuscular na força e no salto em atletas de voleibol: um estudo controlado aleatorizado". Universidade Federal de São Paulo (UNIFESP), 2015. http://repositorio.unifesp.br/handle/11600/39303.
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Introdução: O treinamento de salto é realizado habitualmente por atletas de voleibol. A fototerapia e a estimulação elétrica neuromuscular (EENM) são recursos eficazes na melhora da performance muscular. Porém, há pouca evidência que compare a utilização desses recursos no treinamento de salto em atletas de voleibol. Objetivo: Avaliar a adição da fototerapia e da estimulação elétrica ao treinamento de força muscular e salto em atletas de voleibol. Métodos: Trinta e seis atletas foram distribuídos aleatoriamente em 3 grupos (controle, fototerapia e EENM). Os atletas realizaram treinamento de força muscular e salto associado ou não a fototerapia e a EENM. Os desfechos avaliados foram: força muscular, habilidade de salto, efeito global percebido e frequência de salto na linha de base, e nos acompanhamentos de seis e oito semanas. Resultados: Houve diferença estatisticamente significante na força muscular do membro dominante com oito semanas de acompanhamento a favor do grupo fototerapia e EENM (diferença entre as médias = 1,7; IC 95% 1,1 a 2,4 e diferença entre as médias = 2,5; IC 95% 1,8 a 3,2 respectivamente) e diferença significante na força muscular do membro não dominante a favor do grupo fototerapia e EENM nos acompanhamentos de seis semanas (diferença entre as médias = 1,8; IC 95% 1,1 a 2,6 e diferença entre as médias = 2,6; IC 95% 1,7 a 3,6 respectivamente) e oito semanas (diferença entre as médias de 2,4; IC95% 1,7 a 3,1 e diferença entre as médias de 3,7; IC 95% 3 a 4,5 respectivamente). Os mesmos efeitos não foram observados nos demais desfechos. Conclusão: A fototerapia e a EENM promovem efeito benéfico no ganho de força muscular, porém estes efeitos não foram vistos nos desfechos de performance do salto.
Introduction: The jump training is usually done by volleyball players. Phototherapy and neuromuscular electrical stimulation (NMES) are effective resources in improving muscle performance. However, there is little evidence that compares the use of these resources in jump training in volleyball athletes. Objective: To evaluate the addition of phototherapy and electrical stimulation to the training of muscle strength and jump in volleyball athletes. Methods: Thirty-six athletes were randomly divided into 3 groups (control, phototherapy and EENM). The athletes performed strength training and associated jump or not phototherapy and EENM. The outcomes assessed were: muscular strength, jumping ability, overall effect and jump frequency at baseline and 6 and 8 weeks in follow-ups. Results: There were significant differences in muscle strength of the dominant limb with 8 weeks of follow-up in favor of phototherapy group and EENM (difference between means = 1.7, 95% CI 1.1 to 2.4 and difference between means = 2.5; 95% CI 1.8 to 3.2 respectively) and significant difference in muscle strength of the non-dominant limb in favor of phototherapy and EENM group in the 6- week follow-ups (difference between means = 1.8, 95 1.1 to 2.6% and difference between means = 2.6, 95% CI 1.7 to 3.6 respectively) and 8 weeks (difference between the average of 2.4, 95% CI 1.7 to 3 , and one difference between the average of 3.7, 95% CI 3 to 4.5, respectively). The same effects were not observed in other outcomes. Conclusion: Phototherapy and EENM promote beneficial effect on muscular strength gain, but these effects were not seen in the jump performance outcomes.
Poli, Rodrigo de Araujo Bonetti de. "Efeitos da pós ativação neuromuscular induzida por saltos na capacidade anaeróbia em ciclo ergômetro". Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/157233.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
O objetivo do presente estudo foi investigar os efeitos da potenciação pós ativação (PAP) induzida por drop jumps no tempo até a exaustão a 115% da intensidade associada ao consumo máximo de oxigênio (("iV" ) ̇"O" _"2max" ) em ciclo ergômetro, em aspectos neuromusculares da fadiga (central e periférica) e sobre as vias metabólicas não oxidativas (capacidade anaeróbia, via glicolítica e dos fosfagênios). Para isso, o projeto foi dividido em dois estudos independentes. No Estudo A, 14 ciclistas recreacionais do sexo masculino (34 ± 4 anos) foram submetidos a 5 sessões de avaliações. Na primeira sessão realizaram teste incremental até exaustão (TInc), na segunda e terceira avaliações realizaram familiarização ao esforço supramáximo a 115% da ("iV" ) ̇"O" _"2max" , enquanto que na quarta e quinta sessões os participantes realizaram de maneira randomizada o esforço supramáximo a 115% da ("iV" ) ̇"O" _"2max" com e sem PAP (controle). Como esforço indutor da PAP, foram realizados 5 drop jumps (15s de intervalo entre eles) antes do esforço supramáximo. Nas sessões 4 e 5, a fadiga neuromuscular foi avaliada por meio de contrações voluntárias máximas (CVM) de extensão do joelho e estimulação elétrica periférica (PNS) realizadas antes e após o esforço supramáximo. Além disso, a eletromiografia de superfície foi realizada durante o esforço supramáximo para mensuração da roots mean square (EMGRMS) e a frequência mediana (EMGFM) e analisadas de forma estratificada a cada 25% de tempo total de esforço (0-25%, 25-50%, 50-75% e 75-100%). No Estudo B, 16 ciclistas recreacionais do sexo masculino (33 ± 6 anos) realizaram desenho experimental semelhante ao estudo A, entretanto na quarta e quinta sessões, as contribuições dos sistemas metabólicos foram mensuradas pelo componente rápido do excesso de consumo de oxigênio pós exercício (EPOC) (via dos fosfagênios) e pelo delta de lactato (via glicolítica), assumindo a soma das contribuições dessas vias como capacidade anaeróbia (AC[La-]+EPOCrápido), além disso a capacidade anaeróbia também foi mensurada pelo déficit máximo de oxigênio acumulado. Como resultados, no estudo A foi verificado uma melhora do significativa desempenho no esforço supramáximo após a realização da PAP (p=0,02; Δ%=+9,85%). Ambas condições (controle e PAP) apresentaram quedas significativas na força pico medidas durante a CVM e na força evocada pelo estímulo elétrico duplo na musculatura em repouso (p<0,01 e p<0,01, respectivamente) quando comparado o momento pré e pós esforço, indicando uma fadiga periférica causada pelo esforço. Entretanto não houve interação entre as condições (F=4,19; p=0,06 e F=3,03; p=0,09, respectivamente). A EMGRMS e a EMGFM do último quarto de esforço (75-100%) foi significativamente maior que os momentos 0-25%, 25-50%, 50-75%, para ambas as condições (p<0,02), entretanto não houve interação entre grupos (p<0,05). No Estudo B o desempenho no esforço supramáximo foi significativamente maior na condição PAP (p=0,05; Δ%=+7,44%). A contribuição glicolítica e a capacidade anaeróbia mensurada pelo AC[La-]+EPOCrápido foram maiores após a PAP (p=0,002; Δ%= +9,09% e p=0,04; Δ%= +7,75%, respectivamente), entretanto, a contribuição dos fosfagênios não apresentou diferenças significativas entre condições (p=0,35). Portanto, a PAP foi efetiva em melhorar o desempenho em um esforço supramáximo em ciclo ergômetro, tendo sua melhora acompanhada por um aumento da participação glicolítica e da capacidade anaeróbia, além de causar uma “preservação” do aparato neuromuscular durante o esforço para o vasto lateral e o glúteo máximo.
The aim of the present study was investigating the effects of post activation potentiation (PAP) induced by drop jumps in performance during a supramaximal effort at 115% of the intensity associated with maximal oxygen uptake (iV̇ O2max) on a cycle ergometer, also investigating the influence of PAP on neuromuscular fatigue (central and peripheral) and, on the non-oxidative metabolic pathways (anaerobic capacity, glycolytic pathway and phosphagen). Therefore, the project was divided in two independent studies. In Study A, 14 recreational male cyclists (34 ± 4 years) underwent 5 sessions of evaluations, in the first session they performed a graded exercise test (GXT), in the second and third evaluations they performed familiarization to the supramaximal effort to 115% of the iV̇ O2max. In the fourth and fifth sessions, the participants randomly performed the supramaximal effort at 115% of the iV̇ O2max with PAP and without PAP (control). To induce PAP, the volunteers performed 5 drop jumps (15s interval between them) 2 minutes before the supramaximal effort. In sessions 4 and 5, neuromuscular fatigue was assessed by maximal voluntary contractions (CVM) of knee extension with peripheral electrical stimulation (SNP) performed before and after the supramaximal effort. In addition, surface electromyography was performed during the supramaximal effort to measure roots mean square (EMGRMS) and the median frequency (EMGFM) for every 25% of total effort time (0-25%, 25-50%, 50-75% and 75-100% %). In Study B, 14 male recreational cyclists (33 ± 6 years) performed experimental design similar to study A, however in the fourth and fifth session, the contributions of the non-oxydative metabolic systems were measured by the fast component of the excess post-exercise oxygen consumption (EPOC) and the lactate delta (glycolytic pathway), assuming the sum of the contributions of these pathways as anaerobic capacity (AC[La -] + EPOCfast). In addition, the anaerobic capacity was also measured by the maximum accumulated oxygen deficit (MAOD). In study A, an improvement in the supramaximal effort was observed after PAP (p=0.02, Δ%=+9.85%). Both conditions (control and PAP) showed significant decrease in the peak force measured during the CVM and in the force evoked by the double electric stimulus in the resting muscles (p<0.01 and p <0.01, respectively) when compared to the pre and post moments, indicating peripheral fatigue caused by the supramaximal effort. However, ere was no interaction between the conditions (F=4.19, p=0.06 and F=3.03, p=0.09, respectively). The EMGRMS and EMGFM of the last quarter of effort (75- 100%) was significantly higher than the 0-25%, 25-50%, 50-75%, moments for both conditions (p <0.02), however there was no interaction between groups (p<0.05). In Study B, performance on supramaximal effort was significantly higher in the PAP condition (p=0.05, Δ%=+7.44%). The glycolytic contribution and the anaerobic capacity measured by AC[La -] + EPOCfast was higher after PAP (p=0,002; Δ%= +9,09% e p=0,04; Δ%= +7,75%, respectively), however, the contribution of the phosphagen pathway did not show significant differences between conditions (p = 0.35). Therefore, the PAP was effective in improving the performance in a supramáximo effort in cycle ergometer, having its improvement accompanied by an increase in the glycolytic participation and in anaerobic capacity, in addition to causing a "preservation" of the neuromuscular apparatus during the effort for the vastus lateralis and gluteus maximus
FAPESP: 2016/17836-2
Macht, Jordon W. "THE EFFECT OF β-HYDROXY-β-METHYLBUTYRATE (HMB) SUPPLEMENTATION ON NEUROMUSCULAR PERFORMANCE FOLLOWING FATIGUING EXERCISE IN HEALTHY SUBJECTS". UKnowledge, 2015. http://uknowledge.uky.edu/khp_etds/23.
Pełny tekst źródłaBorne, Rachel. "Électrostimulation neuromusculaire et récupération à court terme : implications dans la performance du sportif de haut niveau". Thesis, Université Côte d'Azur (ComUE), 2016. http://www.theses.fr/2016AZUR4138.
Pełny tekst źródłaThe practice of intense and repeated exercises, interrupted with short recovery times, may induce alterations in homeostasis and a decrease of the performance for athletes who are subject to this type of constraints. In this context, the optimization of the recovery processes is a strong possibility to improve performance and the maintain of it all along the competitive period. One of the main limits in the preservation of performance in type high-intensity, repeated at small interval of time, is attributed to the peripheral fatigue, inherent to all the mechanisms implied in the skeletal muscle excitability and contraction. This peripheral fatigue induces an inadequacy between the contributions and the cellular needs of oxygen and nutrients, and also a disability for disposal or recycling the metabolic by-products stemming from the muscular contraction. In order to limit these effects, the increase in blood flow during exercise and recovery seems essential for the good restoring of the state of physiological balance for the body and the preservation of sport performance. Therefore, the neuromuscular electrical stimulation seems to be, in theory, an effective recovery mode to improve the blood flow. This present thesis, comprising three studies, aimed to know precisely the effects of the neuromuscular electrical stimulation - by the use of a new device stemming from the medical field - on the kinetics of recovery of performance, physiological and perceptual markers, in the context of intense exercises repeated in the short terms. We hypothesized that an effective stimulation, increasing the blood flow would allow to optimize short-term recovery between two high-intensity exercises. These results should contribute to optimize, in the future, the strategies of recovery organized after an intense exercise
Blaisdell, Robert B. "Effects of Neuromuscular Fatigue Resulting from Repeat Sprint Exercise Among Trained Cyclists on Measures of Strength and Power Performance". Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/etd/3621.
Pełny tekst źródłaFort, Vanmeerhaeghe Azahara. "Valoració i entrenament del control neuromuscular per a la millora del rendiment esportiu". Doctoral thesis, Universitat Ramon Llull, 2010. http://hdl.handle.net/10803/9233.
Pełny tekst źródłaS'ha utilitzat una mostra de 81 esportistes sans entre els diferents estudis que s'hi presenten. Les diferents avaluacions realitzades han registrat els següents ítems: dolor (escala visual analògica), incidència de lesions esportives, estabilitat postural estàtica i dinàmica (estabilometria i salt unipodal) i força explosiva de l'extremitat inferior (salt amb contramoviment). Els dos mètodes d'entrenament neuromuscular utilitzats són l'anomenat TRAL (Teràpia Reequilibradora de l'Aparell Locomotor) i les VCS (vibracions de cos sencer).
La primera part d'aquesta tesi (Estudis I i II) va tenir l'objectiu de valorar l'eficàcia del mètode TRAL. Aquest va produir una reducció significant del dolor de turmell independentment del gènere registrat, mentre que en el cas del dolor de genoll només hi van haver diferències en les noies estudiades. Un dels altres efectes registrats importants a destacar va ser la reducció significant de l'àrea de desviació del centre de pressions en el cas de les noies, el que representa una millora de l'estabilitat postural. Aquesta dada també va ser positiva en una de les proves registrades en el grup de nois.
La segona part d'aquest treball (Estudi III) es va centrar en donar fiabilitat a una bateria de tests d'equilibri mesurats amb un estabilòmetre, tenint com a objectiu valorar l'estabilitat estàtica i dinàmica de l'extremitat inferior. Es va obtenir una correlació de bona a excel·lent en totes les variables de la millor amplitud promig en el test unipodal d'ulls oberts i tancats. Aquests resultats suggereixen una bona fiabilitat per a la distinció entre grups de subjectes. En el cas del test més dinàmic i proper a la realitat de l'esportista, el salt unipodal, la correlació va ser baixa.
Com a continuació d'aquesta segona part, l'estudi IV va comparar de forma transversal les diferències de l'estabilitat postural estàtica i dinàmica segons sexe i cama dominant. El test d'equilibri unipodal d'ulls oberts no va mostrar diferències significatives en la desviació del centre de pressions entre homes i dones. D'altra banda, el sexe femení va mostrar un major equilibri en els tests més dinàmics (UT i S) en comparació amb el sexe masculí. En relació a les diferències entre cama dominant - no dominant, només es van trobar diferències significatives en les dones en la recepció del salt unipodal, mostrant-se un millor control quan la recepció s'efectuava amb la cama dominant.
La següent línia de treball es va iniciar amb l'estudi V, que va consistir en una revisió sistemàtica sobre els efectes de l'entrenament vibratori sobre el rendiment esportiu en persones físicament actives. Els resultats van mostrar una gran heterogeneïtat clínica i una baixa qualitat metodològica dels treballs analitzats fins la data cercada. Malgrat no poder extreure conclusions clares, existeix una tendència a la millora de la força explosiva. També podem establir un rang segur dels paràmetres d'aplicació de vibracions mecàniques sobre la població d'estudi. Aquest es troba entre 1,7-11mm d'amplitud i entre 20-44 Hz de freqüència, aplicant-se tant en exercicis estàtics com dinàmics i fins a un màxim de 18 minuts de durada per sessió.
Per últim, es va realitzar un assaig clínic controlat aleatori (Estudi VI) amb l'objectiu de valorar l'eficàcia de l'entrenament mitjançant vibracions de cos sencer sobre la força explosiva i el control postural en joves jugadores de bàsquet. Els resultats van mostrar un increment significatiu del salt amb contramoviment, del salt unipodal i de l'equilibri amb ulls tancats a les 8 i 15 setmanes d'entrenament en el grup experimental. És destacable el fet que no es trobessin diferències significatives entre els tests realitzats a les 8 i les 15 setmanes d'entrenament en cap de les variables. D'altra banda, el grup control no va experimentar canvis respecte les valoracions preintervenció. Amb aquests resultats podem afirmar que l'entrenament vibratori possibilita la millora dels paràmetres analitzats, repercutint favorablement en el rendiment esportiu i, també, de forma indirecta, en la prevenció de lesions en esportistes d'alt risc.
A forma de síntesi, els estudis d'aquesta tesi emfatitzen la importància del control neuromuscular sobre el rendiment i prevenció de lesions esportives. És necessari destacar la importància de continuar investigant sobre noves eines que mesurin els paràmetres associats al control neuromuscular, així com seguir estudiant l'eficàcia dels diferents mètodes d'entrenament neuromuscular per a la seva optimització.
El control neuromuscular ha sido descrito como un importante factor para el éxito en el rendimiento deportivo. Del mismo modo, también se ha identificado como clave en la prevención y readaptación de las lesiones deportivas. El principal objetivo de esta tesis doctoral ha sido evaluar la eficacia de diferentes tipos de entrenamiento neuromuscular en deportistas.
Se ha utilizado una muestra de 81 deportistas sanos entre los diferentes estudios que se presentan. Las diferentes evaluaciones realizadas han registrado los siguientes ítems: dolor (escala visual analógica), incidencia de lesiones deportivas, estabilidad postural estática y dinámica (estabilometría y salto unipodal) y fuerza explosiva de la extremidad inferior (salto con contramovimiento). Los métodos de entrenamiento neuromuscular utilizados fueron el llamado TRAL (Terapia reequilibradora del Aparato Locomotor) y las VCE (vibraciones de cuerpo entero).
La primera parte de esta tesis (Estudios I y II) tuvo el objetivo de valorar la eficacia del método TRAL. Este produjo una reducción significativa del dolor de tobillo independientemente del género registrado, mientras que en el caso del dolor de rodilla sólo hubo diferencias en las chicas estudiadas. Otro de los efectos registrados importantes a destacar fue la reducción significativa del área de desviación del centro de presiones en el caso de las chicas, lo que representa una mejora de la estabilidad postural. Este dato también fue positivo en una de las pruebas de equilibrio registradas en el grupo de chicos.
La segunda parte de este trabajo (Estudio III) se centró en dar fiabilidad a una batería de tests de equilibrio medidos con un estabilómetro, teniendo como objetivo valorar la estabilidad estática y dinámica de la extremidad inferior. Se obtuvo una correlación de buena a excelente en todas las variables de la mejor amplitud media en el test unipodal de ojos abiertos y cerrados. Estos resultados sugieren una buena fiabilidad para la distinción entre grupos de sujetos. En el caso del test más dinámico y cercano a la realidad del deportista, el salto unipodal, la correlación fue baja.
Como continuación de esta segunda parte, el estudio IV comparó de forma transversal las diferencias de la estabilidad postural estática y dinámica según sexo y pierna dominante. El test de equilibrio unipodal de ojos abiertos no mostró diferencias significativas en la desviación del centro de presiones entre hombres y mujeres. Por otro lado, el sexo femenino mostró un mayor equilibrio en los tests más dinámicos (UT y S) en comparación con el sexo masculino. En relación a las diferencias entre pierna dominante - no dominante, sólo se encontraron diferencias significativas en las mujeres en la recepción del salto unipodal, mostrándose un mejor control cuando la recepción se efectuaba con la pierna dominante.
La siguiente línea de trabajo se inició con el estudio V, que consistió en una revisión sistemática sobre los efectos del entrenamiento vibratorio sobre el rendimiento deportivo en personas físicamente activas. Los resultados mostraron una gran heterogeneidad clínica y una baja calidad metodológica de los trabajos analizados hasta la fecha buscada. A pesar de no poder extraer conclusiones claras, existe una tendencia a la mejora de la fuerza explosiva. También podemos establecer un rango seguro de los parámetros de aplicación de vibraciones mecánicas sobre la población de estudio. Este se encuentra entre 1,7-11mm de amplitud y entre 20-44 Hz de frecuencia, aplicándose tanto en ejercicios estáticos como dinámicos y hasta un máximo de 18 minutos de duración.
Por último, se realizó un ensayo clínico controlado aleatorio (Estudio VI) con el objetivo de valorar la eficacia del entrenamiento mediante vibraciones de cuerpo entero sobre la fuerza explosiva y el control postural en jóvenes jugadoras de baloncesto. Los resultados mostraron un incremento significativo del salto con contramovimiento, del salto unipodal y del equilibrio con ojos cerrados a las 8 y 15 semanas de entrenamiento en el grupo experimental. Es destacable el hecho de que no se encontraran diferencias significativas entre los tests realizados a las 8 y las 15 semanas de entrenamiento en ninguna de las variables. Por otra parte, el grupo control no experimentó cambios respecto a las valoraciones preintervención. Con estos resultados podemos afirmar que el entrenamiento vibratorio posibilita la mejora de los parámetros analizados, repercutiendo favorablemente en el rendimiento deportivo y, también, de forma indirecta, en la prevención de lesiones en deportistas de alto riesgo.
En forma de síntesis, los estudios de esta tesis enfatizan la importancia del control neuromuscular sobre el rendimiento y prevención de lesiones deportivas. Es necesario destacar la importancia de continuar investigando sobre nuevas herramientas que midan los parámetros asociados al control neuromuscular, así como seguir estudiando la eficacia de los diferentes métodos de entrenamiento neuromuscular para su optimización.
Neuromuscular control is believed to be an important factor for success in athletic performance. Similarly, it has also been identified as a key to prevention and rehabilitation of sports injuries. The main objective of this thesis is to evaluate the effectiveness of different types of neuromuscular training in athletes.
A total of 81 healthy athletes were used for the purpose of the study. The evaluations performed have resulted in the following items: pain (visual analogue scale), incidence of sports injuries, static and dynamic postural stability (stabilometry and one-leg hop test) and explosive strength of the lower extremity (countermovement jump). Neuromuscular training methods used were TRAL (Locomotive rebalancing therapy) and WBV (whole body vibration).
The first part of this thesis (Studies I and II) aims to assess the efficacy of TRAL. The training period showed a significant reduction of ankle pain recorded regardless of gender, whereas in the case of knee pain only differences in the girls studied were found. Another important effect to highlight that contributes to an improvement of stability in body position in women is the significant reduction of movements of the centre of pressure, while there was only a significant reduction in one of the men tests.
The aim in the second part (Study III) is to assess the static and dynamic stability of the lower extremities focusing on battery of tests reliability measured with a stabilometer. Correlation obtained in single leg stance test of open and closed eyes was found in the range between good to excellent, in all variables of t he best average amplitude. These results suggest a good reliability for the distinction between subject groups. Regarding a more dynamic and closer to athlete's reality test, the one-leg hop test, poor correlation was obtained.
Continuing in the second part, study IV compares differences between static and dynamic position stability, by sex and leg dominance. The one leg stance with open eyes test showed no significant difference in the deviation of center of pressure between men and women. Moreover, females showed more balance in higher dynamics tests (UT and S) compared with males. The differences regarding dominant - non dominant leg, were found only in girls in receiving one leg jump, showing a better control where the reception took place with the dominant leg.
The next topic begins with study V, which consists of a systematic review on the effects of vibration training in physically active people. The results demonstrate a high clinical --heterogeneity and low methodological quality of previous studies performed prior to the date of our study. Even if we cannot provide a specific result, there is a tendency to improve explosive strength. Also, we can certainly establish a safe range of parameters for vibration training to be applied on a physically active population. This range goes from 1.7-11mm amplitude, 20-44 Hz frequency, both in static and dynamic exercises, and up to 18 minutes working with vibration.
In the last topic, we conduct a randomized controlled trial (Study VI) aimed to assess the effectiveness of whole body vibration training on explosive strength and postural control in young basketball players. The results showed a significant increase in countermovement jump, one-leg hop test and balance with closed eyes at 8 and 15 weeks of training with the experimental group. It is noteworthy that no significant differences were found between tests performed at 8 and 15 weeks of training in any of the variables. Moreover, the control group experienced no changes from pre-intervention assessments. Based on these results we can state that vibration training enables the improvement of the analyzed parameters, impacting positively on athletic performance, and indirectly prevents injuries in high-risk athletes.
In conclusion, this thesis emphasizes the importance of neuromuscular control on sports performance and prevention of injuries. It is necessary to stress the importance of continuing the research on new tools to measure parameters associated with neuromuscular control, and further studying the effectiveness of different methods of neuromuscular training for its optimization.
Cormie, Prue. "A series of investigations into the effect of strength level on muscular power in athletic movements". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2009. https://ro.ecu.edu.au/theses/1816.
Pełny tekst źródłaTsakiris, Alexandros. "The effects of strenuous isokinetic eccentric exercise on neuromuscular and sensorimotor performance of the knee flexors in adults and children". Thesis, University of Exeter, 2009. http://hdl.handle.net/10036/82959.
Pełny tekst źródłaFatoye, Francis A. "An assessment of neuromuscular performance, functional range of motion and quality of life characteristics in children diagnosed with hypermobility syndrome". Thesis, Queen Margaret University, 2008. https://eresearch.qmu.ac.uk/handle/20.500.12289/7427.
Pełny tekst źródłaYates, Christopher. "Effects of reconstruction surgery and individualised rehabilitation on neuromuscular, sensorimotor and musculoskeletal performance in patients with anterior cruciate ligament deficiency". Thesis, Queen Margaret University, 2016. https://eresearch.qmu.ac.uk/handle/20.500.12289/7421.
Pełny tekst źródłaKavanaugh, Ashley A., Satoshi Mizuguchi, Michael H. Stone i G. Gregory Haff. "Whole-Body Vibration Does Not Affect Sprint Performance in Ncaa Division I Sprinters and Jumpers". Digital Commons @ East Tennessee State University, 2014. https://dc.etsu.edu/etsu-works/4625.
Pełny tekst źródłaKwon, Yongung. "EFFECTS OF CHRONIC ANKLE INSTABILITY AND REST INTERVALS ON PERFORMANCE, NEUROMUSCULAR FUNCTION, POSTURAL CONTROL, AND BIOMECHANICS DURING THE STAR EXCURSION BALANCE TEST". VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/4054.
Pełny tekst źródłaHopper, Amanda. "Reducing biomechanical risk factors associated with injury during landing and improving performance in 11-13 year old netball athletes". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2016. https://ro.ecu.edu.au/theses/1920.
Pełny tekst źródłaDucrocq, Guillaume. "Influence des mécanismes de régulation de la fatigue neuromusculaire sur la performance motrice". Thesis, Université Côte d'Azur (ComUE), 2017. http://www.theses.fr/2017AZUR4102/document.
Pełny tekst źródłaThe present work aimed to determine the influence of exercise duration and endurance training level on the mechanisms underlying neuromuscular fatigue regulation and the effect of a deceptive strategy on exercise performance. This thesis also aimed to elaborate a new training method that would optimize exercise-induced training stimuli that are known to trigger complementary physical abilities adaptations. The main outcomes of these works are detailed in an expanded abstract at the end of the manuscript
Maciel, N?cia Farias Braga. "Influ?ncia da fadiga no comportamento neuromuscular do quadr?ceps femoral, ap?s reconstru??o do ligamento cruzado anterior". Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/16691.
Pełny tekst źródłaCoordena??o de Aperfei?oamento de Pessoal de N?vel Superior
Muscle fatigue is a phenomenon that promotes physiological and biomechanical disorders and their changes in healthy subjects have been widely studied and have significant importance for care in preventing injuries, but we do not have many information about its effects in patients after ACL reconstruction. Thus, this study is to analyze the effects of fatigue on neuromuscular behavior of quadriceps after ACL reconstruction. To reach this objective, participants were forty men, twenty healthy (26,90 ? 6,29 years) and twenty after ACL reconstruction (29,75 ? 7,01 years) with a graft of semitendinosus and gracilis tendons, between four to six months after surgery. At first, there was an assessment of joint position sense (JPS) at the isokinetic dynamometer at a speed of 5?/s and target angle of 45? to analyze the absolute error of JPS. Next, we applied the a muscle fatigue protocol, running 100 repetitions of isokinetic knee flexion-extension at 90?/s. Concurrently with this protocol, there was the assessment of muscle performance, as the peak torque (PT) and fatigue index, and electromyographic activity (RMS and median frequency). Finally, we repeated the assessment of JPS. The statistical analysis showed that patients after ACL reconstruction have, even under normal conditions, the amended JPS compared with healthy subjects and that after fatigue, both have disturbances in the JPS, but this alteration is significantly exacerbated in patients after ACL reconstruction. About muscle performance, we could notice that these patients have a lower PT, although there are no differences between the dynamometric and EMG fatigue index. These findings show the necessity about the cares of pacients with ACL reconstruction in respect of the risks of articulate instability and overload in ligamentar graft
A fadiga muscular ? um fen?meno que envolve dist?rbios fisiol?gicos e biomec?nicos. A an?lise de suas altera??es, em indiv?duos sadios, possui grande import?ncia na preven??o de les?es, mas pouco se sabe sobre suas repercuss?es em pacientes ap?s reconstru??o do LCA. Dessa forma, o objetivo deste estudo foi avaliar os efeitos da fadiga no comportamento neuromuscular do quadr?ceps femoral de indiv?duos ap?s reconstru??o do LCA. Para tanto, participaram deste estudo quarenta homens, sendo vinte saud?veis (26,90 ? 6,29 anos) e vinte ap?s reconstru??o de LCA (29,75 ? 7,01 anos) com enxerto dos tend?es semitendinoso e gr?cil, entre 4 a 6 meses de p?s-operat?rio. Em princ?pio, realizou-se uma avalia??o do senso de posi??o articular (SPA) ativo, no dinam?metro isocin?tico, a uma velocidade de 5?/s e ?ngulo-alvo de 45?, sendo a vari?vel analisada o seu erro absoluto. Em seguida, aplicou-se uma avalia??o isom?trica m?xima em extens?o do joelho, a 60? de flex?o, por 10 segundos e um protocolo de fadiga muscular, sendo executadas 100 repeti??es isocin?ticas conc?ntricas de flexo-extens?o do joelho a 90?/s. Concomitantemente a esse protocolo, realizou-se a avalia??o do desempenho muscular, observando o pico de torque (PT), o ?ndice de fadiga (IFD) e a atividade eletromiogr?fica (Root Mean Square - RMS e freq??ncia mediana - Fm). Por fim, repetiu-se a avalia??o da SPA. As avalia??es detectaram que pacientes ap?s reconstru??o do LCA apresentaram, ainda em condi??es pr?-fadiga, o SPA alterado quando comparado com indiv?duos sadios e que quando fatigados, ambos possu?ram dist?rbios no SPA, sendo que essa altera??o foi significativamente mais exacerbada em pacientes ap?s reconstru??o de LCA. Quanto ao desempenho muscular, constatou-se que esses pacientes apresentam um menor PT, RMS e Fm quando comparado ao grupo controle, mas n?o possuem diferen?as quanto ao ?ndice de fadiga, dado pela Fm e pela dinamometria. Ademais, constatou-se que as vari?veis isocin?ticas e eletromiogr?ficas, em sua grande maioria, apresentam correla??es positivas. Os achados refor?am a necessidade dos cuidados aos pacientes ap?s reconstru??o do LCA, quando submetidos ? fadiga, no que diz respeito aos riscos de instabilidade articular e sobrecarga do enxerto ligamentar
Bailey, Andrea Kay. "Enhancing rehabilitation following anterior cruciate ligament reconstruction". Thesis, University of Exeter, 2015. http://hdl.handle.net/10871/17475.
Pełny tekst źródłaCavalcante, Marcos David da Silva. "Efeitos da execução prévia do exercício físico e cognitivo sobre a estratégia de prova no ciclismo: um estudo acerca dos componentes centrais e periféricos da fadiga neuromuscular". Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/39/39132/tde-15072016-095944/.
Pełny tekst źródłaThe aim of this study was to analyze the effects of previous execution of physical exercise and cognitive on the central and peripheral components of the neuromuscular fatigue during a 4 km cycling time trial. Eight trained cyclists (n = 8) participated of three different studies. In study 1, the athletes performed the 4 km cycling time trial test after watching a documentary (CON) or after a cognitive task (CT). In study 2, the 4-km cycling test was performed after 100 drop jumps (DJ), 48 hours after 100 drop jumps (48h-DJ) and without previous exercise (CON). In study 3, the time trial was performed after pre-fatigue of the upper (FU) and lower (FL) body and without prefatigue (CON). In all studies, central and peripheral fatigue parameters were evaluated via electrical stimulation in femoral nerve at rest, before and after 4km cycling. Study 1: Performance was similar (P> 0.05) between CON (376 ± 26.9 s) and TC (376.3 ± 26 s). Likewise, we found no significant differences (P> 0.05) for parameters of central and peripheral fatigue between CON and CT. Study 2: Performance was significantly (P< 0.05) impaired in DJ (-2.3%) and there was a trend in 48h-DJ (-1.8%). This reduction in performance in 48h-DJ was due to a lower power at first part of the time trial (P< 0.05). In DJ condition, loss in performance was due to lower power (P< 0.05) at the start and end phases of the test. There was exacerbated (P <0.05) peripheral fatigue after the time trial in DJ (1Hzpot = -44.7%) compared to CON (1Hzpot = 20.1%). Furthermore, a significant low frequency fatigue was observed in DJ compared to CON. On the other hand, central and peripheral fatigue parameters showed similar values between CON and 48h-DJ (P> 0.05). However, a significant increase in delayed onset muscle soreness was found in 48h-DJ than CON and DJ. Study 3: Performance was reduced in FU (-2.3%) and FL (-1.5%) compared to CON. The lowest performance was accompanied by a reduction in power (P< 0.05) in the initial (FL) and final (FL and FU phases of the time trial. After 4 km cycling, participants had a lower (P< 0.05) peripheral fatigue in FU (1Hzpot = -11.9%) compared with CON (1Hzpot = -20.1%). In FL, there was a greater peripheral fatigue compared to CON and FB condition. In conclusion, the results of these studies suggest that only the previous execution of exercise involving the muscles used in cycling causes changes in the peripheral components of the neuromuscular fatigue after 4 km of cycling
Madruga, Parera Marc. "Inter-limb asymmetries and sports performance: from assessment to the application of a sport-specific iso-inertial resistance training in young athletes". Doctoral thesis, Universitat de Girona, 2020. http://hdl.handle.net/10803/671226.
Pełny tekst źródłaCom a síntesis d’aquest procés d’investigació, les asimetries detectades en els diferents esports multidireccionals mostren variabilitat en les magnituds segons la prova seleccionada. A més, en l’anàlisis individuals les proves realitzades, s’ha pogut observar que els esportistes mostren preferències en l’habilitat de la cama en funció de la prova. El test de salt vertical, la variable del COD i canvi de direcció amb resistència iso-inercial mostra majors magnituds en la detecció d’asimetries en esports multidireccionals. El canvi de direcció amb resistència iso-inercial permet, detectar les asimetries en accions pròximes a l’esport. Per un altre costat, els nostres resultats també mostren que les asimetries influeixen negativament en el rendiment de salt, canvi de direcció, capacitat de repetir canvis de direcció i velocitat en esprint lineal. Per a finalitzar, hem pogut observar que l’entrenament iso-inercial provoca majors adaptacions en el rendiment i majors reduccions d’asimetries que l’entrenament de força convencional de cable gravitacional
Clemençon, Michel. "Fonction musculaire et performances fonctionnelles de la personne âgée". Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10312/document.
Pełny tekst źródłaThis work has focused on the study of factors that explain the functionals performances of the lower limbs of the elderly. In a first study we showed that the maximum power (Pmax) and its component called the optimal speed (Vopt) obtained during a test of force-velocity of the knee extensors, are important determinants of functional performance elderly evaluated on three tests: walking on 6m, sit to stand 5 times from a chair and climbing 5 stairs. The more a person has a high Pmax and Vopt, the more its performance during functional tests will be. In addition, Vopt is considered an indirect assessment of the percentage of fast fibers; subjects with the highest values of Vopt are best performers during functional tests. The second study measured and compared the electromyographic (EMG) activity of the quadriceps when tested for isometric maximum voluntary contraction (IMVC), determination of maximum power and functional tests mentioned above. Measurement of EMG signal during these tests was used to determine to what extent the type of task induced a maximum activation or not. Older people show a greater ability to activate their quadriceps muscles when tested for concentric contraction rather than isometric or eccentric contractions. Tests using the IMVC compared to tests for determining the power, sit-tostand and stairs climbing would not be the most appropriate tests to measure the maximum neuromuscular activation capacity in the elderly. From these results improved testing of the elderly and guidelines for rehabilitation are proposed