Made available in DSpace on 2014-06-11T19:30:53Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-04-13Bitstream added on 2014-06-13T19:40:24Z : No. of bitstreams: 1 molina_r_dr_rcla.pdf: 1580344 bytes, checksum: 7e4493046f62a81aaae554c81ae0e39c (MD5) / Exercícios intensos e/ou não habituais, realizados através de contrações excêntricas, ocorrem constantemente em nossas vidas, os quais podem resultar em dores musculares imediatas ou tardias, com um marcado e prolongado efeito sobre nossa capacidade funcional. Desta forma, o presente trabalho teve como objetivo analisar o efeito do exercício excêntrico (EE), associado com dano muscular, sobre as propriedades mecânicas do músculo e índices de aptidão aeróbia. Metodologicamente o experimento foi dividido em 1 e 2. No primeiro experimento, doze homens (21,7±2,3 anos) saudáveis, não treinados, foram avaliados, através de três contrações voluntárias máximas (CVM), no pico de torque (PT) isocinético do quadríceps, e correspondente, pico da taxa de desenvolvimento de torque (pico TDT), pico da taxa de desenvolvimento de velocidade (pico TDV) e impulso contrátil (IC) a 60º.s-1 antes e após 24h e 48h de um protocolo de exercícios excêntricos de dez séries de dez repetições máximas. No segundo experimento, vinte homens (24,4±3,5 anos) saudáveis e não treinados foram divididos em dois grupos, de acordo com a cadência realizada no ciclismo (50 rpm e 100 rpm), e avaliados para a cinética de consumo de oxigênio ( O2) e eficiência mecânica bruta (EB) e de trabalho (ET), através de três transições de ciclismo com duração cada uma de 6min a 90% do limiar de lactato precedidas de 4min a 0W, antes e após 24h e 48h do protocolo de EE. Nos dois experimentos os indicadores indiretos de dano muscular de dor muscular tardia (DMT), atividade da creatina quinase (CK) plasmática e pico de torque isocinético concêntrico (PT) foram significantemente alterados 24h e 48h após o protocolo de exercícios excêntricos, em relação aos valores de base. No primeiro experimento o PT (-15,3%, p=0,002), pico TDT (-13,1%,. p=0,03) e IC (-29,3%,. p=0,01) diminuíram significantemente... / Intense and/or unusual exercises, related to eccentric contractions are constant in our lives, resulting in immediate or delayed onset muscle soreness (DOMS) and may have a marked and prolonged effect on our functional capacity. Thus, this study was to analyze the effect of eccentric exercise (EE), associated with muscle damage, on the mechanical properties of muscle and indices of aerobic fitness. Methodologically the experiment was divided into 1 and 2. In the first experiment, twelve (21.7 ± 2.3 years) healthy untrained men subjects were assessed at peak torque (PT) isokinetic quadriceps, and the corresponding peak rate of torque development (peak RTD), peak rate velocity development (peak RVD) and contractile impulse (CI) at 60o. s-1 before and after 24h and 48h isokinetic EE protocol of 10 sets of 10 repetitions. In the second experiment, twenty (24.4 ± 3.5 years) healthy and untrained men were divided into two cycling cadence groups (50 rpm and 100 rpm) and evaluated for the pulmonary oxygen uptake ( O2) kinetics and gross (GE) and work (WE) mechanical efficiency through 3 transitions cycling lasting each of 6 min at 90% lactate threshold preceded by 4min at 0W, before and after 24h and 48h protocol EE. In both experiments, DOMS (DMT), activity of creatine quinase (CK) in plasma and peak isokinetic concentric torque (PT) was significantly altered at 24h and 48h after the eccentric exercise protocol. In the first experiment, the PT (-15.3%, p = 0.002), peak RTD (-13.1%. p = 0.03) and CI (- 29.3%. p = 0.01) decreased significantly to 24h and peak RVD not changed. After 48h, PT (-7.9%, p = 0.002) and CI (-29.2%, p = 0.003) were maintained less values but RTD recovered to baseline values. RTD normalized to PT (% CVM.s-1) measured at 30 ms (24h = 580.5%, p = 0.01 and 48h = 681.3%, p = 0.006) and 100 ms (48h = 623.3 %, p = 0.009) the onset of contraction was higher than the previous... (Complete abstract click electronic access below)

Submitted by Izabel Franco (izabel-franco@ufscar.br) on 2016-09-09T19:26:26Z No. of bitstreams: 1 DissEDSP.pdf: 6380932 bytes, checksum: c9e44ddd1efb77d2510ac8d3378bbadf (MD5) / Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-09-12T18:12:27Z (GMT) No. of bitstreams: 1 DissEDSP.pdf: 6380932 bytes, checksum: c9e44ddd1efb77d2510ac8d3378bbadf (MD5) / Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-09-12T18:12:34Z (GMT) No. of bitstreams: 1 DissEDSP.pdf: 6380932 bytes, checksum: c9e44ddd1efb77d2510ac8d3378bbadf (MD5) / Made available in DSpace on 2016-09-12T18:12:41Z (GMT). No. of bitstreams: 1 DissEDSP.pdf: 6380932 bytes, checksum: c9e44ddd1efb77d2510ac8d3378bbadf (MD5) Previous issue date: 2015-04-06 / Não recebi financiamento / Potentially Significant Teaching Unit (UEPS), proposal to work the concepts of Mechanics, with high school students from public schools in the city of Orlândia - SP. With the main objective to promote meaningful learning of students, the development of this didactic proposal had as a motivational factor to search for a more effective participation of students through activities that lead them to analyze, question, present and discuss their ideas, being active agent in the teaching and learning process. Based on the general profile of young people in the processes present in their daily lives and in their prior knowledge, were used as motivational strategies, the use of different methodological tools and the relationship between and sports. Through different activities based and selected according tthoe tshee cpornecveioputss knowledge of the student, as the use of videos, experiments and simulations, were studied Newton's laws and how these can be verified in situations related to various sports. Thus, in this work we could verify the importance of motivation and effective participation for the construction of meaningful learning in a school project that promotes life experiences for students. / uma unidade de ensino potencialmente significativa (UEPS) proposta para trabalhar os conceitos relativos à Mecânica, com alunos do Ensino Médio da rede pública estadual do município de Orlândia – SP. Com o objetivo principal de promover a aprendizagem significativa dos alunos, o desenvolvimento dessa proposta didática teve como fator motivacional a busca por uma participação mais efetiva dos alunos, por meio de atividades que levem ao aluno a analisar, questionar, apresentar e discutir suas ideias, sendo agente ativo no processo de ensino aprendizagem. Tendo como base o perfil geral dos jovens, os processos presentes em seu cotidiano e os seus conhecimentos prévios, foram utilizadas como estratégias motivacionais, o uso de diferentes ferramentas metodológicas e a relação existente entre esses conceitos e os esportes. Por meio de atividades diferentes, baseadas e selecionadas de acordo com os conhecimentos prévios do aluno, como a utilização de vídeos, experimentos e simulações, foram estudas as leis de Newton e como estas podem ser verificadas em situações relacionadas a diversas modalidades esportivas. Assim, nesse trabalho pudemos verificar a importância da motivação e da participação efetiva para a construção de uma aprendizagem significativa em um trabalho escolar capaz de promover experiências vivenciais para os alunos.

The diploma thesis deals with the problematic use of the internet and tries to find out whether there is a connection between excessive use of the internet and active sports. It tries to clarify whether and how much active sports reduce the risk of internet addiction with a focus on university students in the Czech Republic. The work consists of theoretical and empirical part. The theoretical part deals with the description of the background and describes the concept of addiction with a primary focus on the pathological use of addictive substances. It also discusses the area of behavioral addictions, in which it focuses on the internet addiction. This section briefly describes the situation in the Czech Republic. In the empirical part of the work, based on the evaluated questionnaires, a research sample is characterized, the result of the internet addiction test is given and the frequency of sports for the given research group is described. The final chapter is devoted to the evaluation of the whole work and research. Based on the facts found in the questionnaire, the mutual influence of active sports and the level of internet use on the examined sample was not confirmed.