904 resultados para Limiar lactato


Relevância:

20.00% 20.00%

Publicador:

Resumo:

In the competitive judo, the form as a trainer organizes the process of his/her athlete's training is a very important task for a good acting and a better use of the technical procedures. There is great importance in determining the exercise intensity for the judocas training due to the interest for the high income in several competitions, and few studies returned for this research area, involving those athletes' different physiologic conditions. Therefore, it is necessary to improve protocols of physical evaluation for this modality, increasing his/her applicability. The present study aimed at to verify the validity of a protocol of specific aerobic test of the judo (technique ipon-seoi-nague), no exhausting, adapted of the method of CHASSAIN (1986), using deltas of variations of the lactacidemia and of the Scale of Perception of Effort of Borg, in athletes well. The test adapted to the judo constituted of four exercise series with two efforts similar (double) of 180 seconds with one interval of 90 seconds among them. The series of exercises were accomplished in consecutive days. The intensities of the double tests were of 85%, 95%, 105% and 115% of the minimum lactato for each participant. This work used the technique ipon-seoi-nague, obeying the reasons effort-pause individualized for each athlete, that you/they correspond to the intensities of exercises proposed by the protocol of CHASSAIN (1986). In that way, the athletes applied a blow (maximum speed) and they rested some seconds, depending on the regime effort-pause of the session. At the end of each collection collection of blood (25NL) of each participant's earlobe was accomplished, seeking to measure the concentration of sanguine lactato. The collections were accomplished at the end of the first and of the second efforts, in each one of the series. For the analysis of the Perception of the athletes' Effort, the Scale of Perception... (Complete abstract click electronic access below)

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Sabe-se que a desnutrição protéica fetal/neonatal pode predispor à resistência à insulina e à síndrome metabólica após recuperação nutricional. O treinamento físico, por sua vez, melhora a tolerância à glicose e a sensibilidade à insulina, além de exercer efeitos benéficos ao crescimento somático. Por outro lado, faltam informações quanto à habilidade de organismos desnutridos muito jovens para a realização do exercício. Modelos animais podem auxiliar a investigação desta questão, uma vez que o estudo em humanos apresenta limitações. Alimentação de ratos com dietas isocalóricas com baixo teor protéico é um modelo de desnutrição bastante utilizado para simular a desnutrição humana. Assim sendo, o presente estudo foi delineado para avaliar a cinética de lactato sanguíneo durante uma sessão de natação de ratos recém desmamados submetidos à restrição protéica fetal/neonatal. Foram avaliados dois grupos de animais recém-desmamados (21 dias, machos), contendo 8 animais em cada um: Normoprotéico (NP), crias de ratas alimentados com dieta normoprotéica (AIN 93G, 17% caseína) durante a gestação e a lactação e Hipoprotéico (HP):crias de ratas alimentados com dieta normoprotéica (6% caseína) durante a gestação e a lactação. Foram analisados peso ao nascer, concentrações séricas de proteínas totais e albumina dos recém-nascidos assim como ao desmame. Os dados foram analisados pelo teste t de student não pareado, sendo o nível de significância pré-estabelecido em 5%. Quando se avaliou os animais recémnascidos observou-se que a restrição protéica neonatal foi eficaz na instalação do quadro de desnutrição visto menores valores referente ao peso corporal, proteínas... (Resumo completo, clicar acesso eletrônico abaixo)

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The objective of this study was to analyze the influence of previous exercise on the determination of critical power (CP). Seven apparently healthy nontrained males, of 18 to 25 years, participated of this study. The subjects were submitted, in different days to the following protocols in a cyclergometer: 1) one progressive test until voluntary exhaustion for the determination of lactate threshold (LL), maximal oxygen uptake (VO2max) and its corresponding intensity (IVO2max); 2) six constant workload tests at 95,100 and 110% IVO2max until exhaustion with and without a previous exercise at 70% , in random order. The exhaustion times (tlim) at 95, 100 and 110% IVO2max were adjusted forme thress models of two parameters to estimate CP and anaerobic work capacity (AWC) [P=CTAn/tlim)+CP; tlim = CTAn/(P-PC); P=PC.tlim+ CTAn]. The model with the lowest standard error was considered for the estimation of CP. The tlim at 95% IVO2max was similar without (501 ± 140 s) and with previous exercise (473 ± 99 s). However, the tlim at 100% (381 ± 103 s and 334 ± 101 s) and 110% IVO2max (267 ± 163 s and 227 ± 68 s) was significantly longer with previous exercise. There was no significant difference in CP and AWCat conditions without (200 ± 27 W and 23 ± 11 kJ, respectively) and with previous exercise (212 ± 30 W and 18 ± 8 kJ, respectively). It can be concluded that the parameters of the relationship between power and time were not modified by the previous severe exercise

Relevância:

20.00% 20.00%

Publicador:

Resumo:

A obesidade é um problema de saúde pública mundial e está fortemente associada à doença cardíaca isquêmica, aterosclerose, hipertensão arterial, entre outros problemas cardiovasculares. Na atualidade, o tratamento sugerido para as doenças cardiovasculares, comumente decorrentes da obesidade, consiste na diminuição da ingestão de gordura aliada à atividade física. Contudo, pouco se sabe quanto aos protocolos de treinamento mais adequados para a prevenção ou tratamento dessas doenças. O presente estudo objetivou analisar os efeitos do exercício físico na intensidade de 80% do limiar anaeróbio (LAn) sobre os aspectos bioquímicos cardíacos de ratos obesos. Para a indução da obesidade, os animais, a partir dos 90 dias de idade, foram mantidos com dieta hiperlipídica/hipercalórica (35% de gordura animal/vegetal) e os animais controles, mantidos com dieta balanceada (AIN-93M). Todos os animais pertencentes ao grupo treinado foram submetidos a testes de lactato mínimo para a identificação do limiar anaeróbio (LAn) durante exercício de natação, treinando desde os 28 dias de idade até aos 90 dias em intensidade equivalente a 80% do LAn 1 h/dia, 5 dias/semana. Depois dos 90 dias uma parte dos animais treinados interrompeu o treinamento ficando em observação até o final do experimento (150 dias de idade). Os demais animais permaneceram sedentários ao longo de todo o experimento. Foram analisados: peso corporal, tolerância à glicose e à insulina (TTGo e TTI), perfil lipídico sérico (colesterol total, triglicerídeos, AGL e HDL), concentrações séricas de glicose e insulina e alíquotas do ventrículo esquerdo foram retiradas para análise das concentrações de triglicerídeos, glicogênio, proteína/DNA e atividade lipogênica. Os animais tratados com dieta hiperlipídica tiveram aumento significativo no peso corporal, intolerância à glicose e resistência à insulina e o treinamento físico neutralizou tais...

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Pós-graduação em Medicina Veterinária - FCAV

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Pós-graduação em Ciências Biológicas (Zoologia) - IBRC

Relevância:

20.00% 20.00%

Publicador:

Resumo:

This papper aims to discuss Ribeirão Preto as a switched-over intermediate city classification, contrastating with the concept of Metropolitan Region of Ribeirão Preto. The agribusiness sector will be analysed as the main responsible for the representation of Ribeirão Preto city as an Agribusiness Center. Due to this fact, Sertãozinho city example will be presented as Agribusiness City, where acctually concentrates the agro-industrial complex of sugarcane production, while Ribeirão Preto is in fact centralizes management activities. According to the balance of trade analysis, other elements showed up and fortifies the role of this cities. These elements unfolded the analysis of higher education guideline and shopping malls. We also analyzed the urban network of Ribeirão Preto under the concept of the Região de Influência das Cidades (REGIC) and the creation of the project Metropolitan Region of Ribeirão Preto in order to strengthen the central hypothesis as a switched-over medium sized city. In order to reach this point, besides the analysis of the data we had t literature review of the Medium Sized Cities and Urban Network concepts and Spatial Interactions and Switched- over terms

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Exercise physiology has attempted to reproduce the experimental exercise in the laboratory using mainly rats. The swimming exercise has emerged as one of the leading research in these type ergometers. Thus, this research consisted of a literature review addressing the key issues which involve the exercise of swimming in the model rats. Training of aerobic and anaerobic swimming, evaluation models and models of periodization were the topics suggested in this research. In several studies, models of aerobic and anaerobic training have been proposed with the aim of studying their effect on normal and abnormal physiological parameters. However, earlier studies lacked methods of analysis aiming to determine the exercise intensity in the animal model. For this reason, in the last decade, assessment models have been adapted for humans to animals, especially rats. The maximal lactate steady state (MLSS) and lactate minimum (LM) are among the various techniques used to measure the amount of effort produced by swimming exercise in rats. Thereafter, based on biochemical parameters such as lactate, swimming exercise in rats has become the highest-rated, ie, using as reference the anaerobic threshold (AT). In another aspect, an entirely new line of research has tried to understand and promising swimming training in a periodized and its effects on some biochemical parameters. But this is an area little researched so far. Thus, the experimental model of swimming has proved an important resource of exercise physiology. From this model, it becomes possible to study the exercise, especially swimming, in more accurate, based on invasive and incisive analysis of the rat

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Pós-graduação em Desenvolvimento Humano e Tecnologias - IBRC