36 resultados para Exercício intervalar

em Universidade Federal do Rio Grande do Norte(UFRN)


Relevância:

60.00% 60.00%

Publicador:

Resumo:

Background: Cardiac Rehabilitation (CR) has effect on mortality in patients with heart failure (HF) chronic, and the exercise of the treatment of this patient. The most common exercise is ongoing training. Recently we have been studying the effects of interval training, but there is no consensus on the optimal dose of exercise. Objective: To evaluate the effects of interval aerobic training are superior to continuous aerobic training in patients with chronic HF. Methods: The clinical trial evaluated patients through cardiopulmonary test (CPX) and quality of life before and after the RC (3 times / 12 weeks). Patients were randomized into Group Interval Training (GTI - 85% of heart rate reserve - FCR), Continuous Training Group (GTC - 60% of HRR) and control group (CG) who received guidelines. Results: 18 patients were evaluated (mean age 44.7 ± 13.2 years and 35.2 ± 8.9% of left ventricular ejection fraction [LVEF]). Both groups were efficient to increase the peak VO2 and 15.1% (P = 0.02) in GTI and 16.1% (P = 0.01) GTC. As for the quality of life the GTI GTC showed improvement compared to the control group (P = 0.006). Hemodynamic mismatch events during the CPX were reduced after training in more GTC (patients 1 to 4) than in the GTI (5 to 3). Cardiac risk also decreased in the GTC (3 patients left the severe risk to take after training). Conclusion: Continuous training becomes more appropriate for improving fitness with little chance of developing cardiac event patients with chronic HF.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Introdução: Os hormônios estrogênicos possuem importante papel na defesa contra as espécies reativas do oxigênio, fato que se evidencia na maior incidência de doenças cardiovasculares e neurodegenerativas após a menopausa. O exercício físico melhora as defesas antioxidantes, contudo em altas cargas e em baixas concentrações de estrógeno possui efeito aditivo ao dano oxidativo. O ácido α-lipóico possui uma ampla gama de ação antioxidante e poderia contribuir para diminuição do dano nestas condições. Objetivo: O objetivo deste estudo é caracterizar a ação do ácido α-lipóico sobre a adaptação antioxidante e funções reprodutivas de ratas submetidas a natação moderada. Material e métodos: Os animais foram submetidos a natação diária (1 hora) e sacrificados após 30, 60 e 90 dias. Os animais foram divididos em controles sedentários e exercitados; suplementados (ácido α-lipóico 100mg/Kg/dia) sedentários e exercitados e animais ovariectomizados e suplementados com ácido lipóico. Avaliou-se diariamente o ciclo estral e os seguintes marcadores de estresse oxidativos foram mensurados em fígado e sangue: atividade enzimática da SOD, GPx e CAT, além do SRAT e GSH. Resultados: O protocolo de exercício aumentou a duração do ciclo estral no grupo controle exercitado, sobretudo na fase diestral. Neste mesmo grupo, houve diminuição da lipoperoxidação com melhora da atividade antioxidante da SOD e GPx. O grupo exercitado e suplementado não apresentou alteração na duração do ciclo estral e manteve os benefícios sobre o sistema antioxidante antes observado nos animais exercitados. A suplementação antioxidante juntamente com a natação em períodos superiores a 30 dias, diminuiu o processo de adaptação antioxidante quando comparado aos animais somente exercitados. Nos animais ovariectomizados, o exercício e a suplementação com ácido lipóico não promoveu adaptação antioxidante ao contrário dos demais grupos. Conclusão: O aumento na duração do ciclo estral e a melhora nos marcadores de estresse oxidativo seriam uma resposta adaptativa frente ao exercício moderado. O ácido lipóico impediu a alteração no ciclo induzida pelo exercício, mas preservou a melhoria no sistema antioxidante. A depleção estrogênica provocada pela ovariectomia eleva o potencial de dano oxidativo gerado pelo exercício. A ação antioxidante do LA na presença de estrógeno diminuiu excessivamente o dano oxidativo, comprometendo a adaptação antioxidante a natação. Nos animais ovariectomizados, contudo, o AL promoveu adaptação antioxidante ao exercício

Relevância:

20.00% 20.00%

Publicador:

Resumo:

analisar o efeito do treinamento aeróbio periodizado sobre a aptidão cardiorrespiratória e respostas afetivas em mulheres com síndrome dos ovários policísticos (SOP) e II) investigar se o exercício aeróbio realizado na zona de prazer para essa população atende a recomendação do American College of Sports Medicine (ACSM) no que se refere à intensidade para melhoria da saúde. Metodologia: foram incluídas mulheres na faixa etária entre 18 e 34 anos, com diagnóstico de SOP de acordo com o Consenso de Rotterdam. Para o subestudo I, oito pacientes sedentárias participaram de 16 semanas de treinamento aeróbio com incrementos mensais de intensidade: fase 1 = 60-70% da frequência cardíaca máxima (FCmax); fase 2 = 70-75% da FCmax; fase 3 = 75-80% da FCmax; fase 4 = 80-85% da FCmax. A intervenção foi realizada três vezes por semana, 40 minutos por sessão. Em todas as sessões foram registradas as respostas afetivas (Feeling Scale -5/+5) e a percepção subjetiva do esforço (escala de Borg CR 6-20). Antes e após a intervenção, as voluntárias realizaram teste ergoespirométrico. Para o subestudo II, 11 pacientes realizaram duas sessões de exercício aeróbio na zona de prazer, sendo registrados parâmetros relativos à demanda física através de receptor de GPS (Global Positioning System) de pulso com cardiofrequencímetro acoplado. As pacientes foram instruídas a realizar 40 minutos de exercício guiadas pelas âncoras verbais bom e muito bom (+3 e +5 na Feeling Scale). Resultados: no subestudo I, após 16 semanas de treinamento, houve aumento da aptidão cardiorrespiratória máxima (17,3%) e submáxima (21,5%). As respostas afetivas variaram entre bom (+3,1 ± 0,8) e razoavelmente bom xi (1,0 ± 0,9) e a percepção subjetiva do esforço entre muito leve a leve (10,2 ± 0,7) e um pouco difícil (12,7 ± 0,6) durante a intervenção. No subestudo II, as pacientes exercitaram-se a ~72,5 ± 6% da FC máxima, ~78,5 ± 6% da FC no limiar anaeróbio e passaram > 95% do tempo em intensidade moderada (~82%) e vigorosa (~16%) durante as sessões experimentais. Em média, as voluntárias reportaram as sessões como fácil (percepção subjetiva do esforço da sessão ~2,2 ± 0,7). Conclusões: o programa de treinamento aeróbio periodizado aumentou a aptidão cardiorrespiratória das pacientes analisadas e foi percebido como uma intervenção prazerosa. Adicionalmente, exercício aeróbio realizado de forma prazerosa atende a recomendação do ACSM no que se refere à intensidade para melhoria da saúde

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The aim of this study was to analyze the effects of an aerobic exercise program on the internal right carotid resistive index (IRCRI) and the functional autonomy levels of elderly women. The sample was composed of 25 elderly sedentary women, aged between 60 and 75 years, allocated into two groups: an experimental group consisting of 14 women submitted to aerobic treatment and a control group (n=11). Carotid artery resistance assessment was conducted using Doppler ultrasound and functional autonomy by the following tests: 10m walk (10mW), rising from a sitting position (RSP), rising from a chair and moving about the house (RCMH), rising from the ventral decubitus position (RVDP) and putting on and removing a t-shirt (PRTS). Aerobic training consisted of walking 30 minutes a day, 3 times a week, for 3 months. To control the intensity of the walk, the index of perceived exertion was used, with standardized Borg scale values corresponding to 13-15 points, characterized as slightly tiring exercise with training heart rate (TRH) between 50% and 80% of heart rate reserve (HRR). Repeated measures ANOVA was used for statistical analysis. Compared to the control, the experimental group obtained a statistically significant decrease in right internal carotid resistance (p = 0.021) and a significant increase in the following tests: 10mW (p=0.000), RSP (p=0.035) and RCMH (p=0.016). These results suggest that engaging in aerobic exercises was effective in decreasing IRCRI and improving functional autonomy inelderly women

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Este estudo teve como objetivo analisar os efeitos de um programa de exercício físico aeróbico sobre o índice de resistência da artéria carótida interna direita (IRCID) e os níveis de autonomia funcional de mulheres idosas. A amostra foi constituída por 25 idosas sedentárias, com idade entre 60 e 75 anos, divididas em dois grupos: grupo experimental com 14 idosas submetidas ao treinamento aeróbico e grupo controle (n=11). A avaliação da resistência da artéria carótida foi realizada pelo método de ultrasom Doppler e a autonomia funcional pelos testes: caminhar 10m (C10m), levantar da posição sentada (LPS), levantar-se da cadeira e locomover-se pela casa (LCLC), levantar-se da posição decúbito ventral (LPDV) e vestir e tirar a camisa (VTC). O treinamento aeróbico foi realizado na forma de caminhada, 30 minutos por dia, 3 vezes por semana, durante 3 meses. Para o controle da intensidade da caminhada foi utilizado o índice de esforço percebido, com valores padronizados pela escala de Borg onde a intensidade deveria corresponder a uma faixa entre os valores 13 a 15 pontos, correspondente a uma situação orgânica derivada de um exercício compreendido como ligeiramente cansativo e a frequência cardíaca de treino (FCT) entre 50% a 80% da frequência cardíaca de reserva. Para analise estatística foi utilizado a ANOVA de medidas repetidas. O grupo experimental quando comparados com o grupo controle obteve uma diminuição estatisticamente significativa na resistência da artéria carótida interna direita (p=0,021), e um aumento significativo nos testes: C10m (p=0,000), LPS (p=0,035) e no LCLC (p=0,016). Estes resultados sugerem que a prática de exercícios físicos aeróbicos foi eficaz em diminuir o IRCID e melhorar os níveis de autonomia funcional em mulheres idosa

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Conselho Nacional de Desenvolvimento Científico e Tecnológico

Relevância:

20.00% 20.00%

Publicador:

Resumo:

A sobrevida das pessoas com AIDS tem aumentado com o uso das terapias com antiretrovirais (TARV), esses, entretanto, possuem efeitos colaterais que interferem no padrão morfofuncional e hematológico, o que pode levar a alterações na qualidade de vida (QV). Este estudo quase-experimental objetivou avaliar parâmetros antropométricos, funcionais, hematológicos e de QV em pessoas com HIV/AIDS submetidas a um programa de exercícios de 16 semanas. Os participantes tinham idade entre 35 e 51 anos (n=15), eram registrados no Núcleo de atendimento do Hospital Giselda Trigueiro em Natal/Rio Grande do Norte e apresentaram CD4350cel/mm3, lipodistrofia e estavam em TARV. Foram avaliados o índice de massa corpórea (IMC), a relação cintura-quadril (RCQ), o percentual de gordura (%G), a força escapular e manual, a contagem de CD4, carga viral e QV, antes e após a intervenção. Essa foi realizada com exercícios de aquecimento e utilizou como base os exercícios resistidos, realizados 3x/semana, com 1h e intensidade de 60 a 75% de 1RM. Observaram-se modificações significativas no %G (p=0,031), força escapular (p=0,007) e preensão manual (p=0,039). Houve aumento no CD4 e a carga viral manteve-se indetectável. Nos domínios da QV, houve mudança significativa no do meio ambiente (p=0,021), espiritualidade, religiosidade e crenças pessoais (p=0,032) e na percepção da qualidade de vida e saúde geral (p=0,005). Os resultados sugerem que os exercícios resistidos para essa população constituem agente terapêutico coadjuvante no controle dos efeitos colaterais advindos da TARV, promovendo modificações na composição corporal, aumento da capacidade funcional e dos níveis de CD4, mantendo estável a carga viral e melhorando a QV. Sugerimos novos estudos com maior tempo de intervenção e com o acompanhamento de equipes multidisciplinares, o que poderá promover melhorias mais significativas na qualidade de vida e efetuar maior controle nas variáveis intervenientes

Relevância:

20.00% 20.00%

Publicador:

Resumo:

This paper aims to discuss the conflicts of competence in environmental matters, as well as the legitimacy of the normative acts in the exercise of jurisdiction effected environmental management. For this work, addresses the issue of federalism, North American (dual) and German (cooperative), deepening its historical and theoretical fundamentals, as well as the influences on the evolution of the ideological matrix of Brazilian federalism. Distinguishes itself around the problem the theoretical and abstract discussion involving the constitutional division of powers, and the issue of his relationship with the vicissitudes in the embracement of environmental matters that invariably leads to mistakes in the exercise of jurisdiction environmental management. Its highlight the existence of a framework environmental law, embodying the principles themselves as well as a specific object of authority, which qualifies a different interpretation of the rules of constitutional powers as well as influencing the acting agent of government in managing the public good environment. The study represents an exploratory research as it investigates the depths of the institutes are in evidence not only with satisfying its practical outcome. For this to happen, explores bibliographical sources and identified by the science of law as more important, as the search for social-political boundary which takes the issue studied in their historical and contextual materiality, whose study is essential for a complete understanding of the topic . The dialectic that arguments have been constructed throughout the monograph, attempts to pass a critical way to expose the author's ideas, which considers as essential in the arrival of new questions

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Zila Mamede left a great contribution to education and culture in Rio Grande do Norte during the 60s, when she built the most important outdoor library from the state the Camara Cascudo s bibliography. It is this aspect of her work that this text tries to apprehend and narrate. Different approaches have brought Zila Mamede to academy, but her work as a librarian yet did not have had any study. Her pioneer work on organizing and preparing professionals to deal with these constructions full of books was waiting to be told. This work articulates itself with the political and cultural production of Natal during the 60, because it was essential to configurate the city at this time. It was also necessary to interview Zila Mamede s friends, relatives and the people who worked with her. This research also demanded a review of many memoirs by potiguares , and the examination of newspapers and magazines to enlighten the period

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The fluctuacion force has been increasingly used in studies with elderly as a good predictor of performance and functionality of the motor. However, most analyzes the fluctuation of force in one session. Thus, identifying the minimum amount of sessions needed for familiarization with the fluctuation strength in isometric exercise become relevant. Furthermore, to investigate the effects of applying transcranial direct current stimulation (tDCS) associated with regular exercise on rates fluctuation task force is extremely important. In the first experiment, volunteers were subjected to a protocol marked by a familiarization session to establish the parameters of VCM and eight sessions with intensity of 30% MVC in office. It was observed that two familiarization sessions are required so there is a fluctuation stabilizing force. In experiment II, subjects performed an isometric contraction before and after applying tDCS (cathode, anode and sham) applied to M1. ETCC anodic effectively contributed to reducing the fluctuation of force during isometric exercise in the elderly, while the cathodic caused the increased levels of strength fluctuation. It was concluded that there is a need to implement a familiarization protocol with at least two sessions to avoid possible misunderstandings of measurements in tests of fluctuacion force. Besides that tDCS interfered with the behavior of the oscillations of force, with cathodic promoting increased fluctuation strength and anodic contributed to greater stability, demonstrating the potential of this technique neuromodulation associated with exercise as rehabilitation tools

Relevância:

20.00% 20.00%

Publicador:

Resumo:

A estimulação transcraniana por corrente contínua (ETCC) é uma técnica não invasiva que apresenta características anti-fadigante e analgésica. Com o objetivo de testar seus efeitos sobre a diminuição da força e do aparecimento da dor muscular de início tardio (DMIT), apresentados após um evento de dano muscular induzido pelo exercício (DMIE), foi utilizado um estudo clínico de caráter experimental, controlado, randomizado e duplo-cego. A amostra foi composta por 24 jovens do sexo masculino, aparentemente saudáveis (19,7±1,8 anos; 23,6±3,65 IMC), os quais foram alocada, de forma aleatória e estratificada, nos seguintes grupos: G1: grupo controle; G2: grupo de estimulação após o dano e G3: grupo com estimulação antes e após o dano muscular. Os dados foram submetidos à estatística descritiva e análise de variância ANOVA, adotando-se um nível de significância de 5%. O aumento nos níveis séricos de CK (56.18%) e LDH (24,15%) comprovou a ocorrência do DMIE. Em contrapartida, após a análise de variância para comparação dos tratamentos aplicados, pode-se observar que não houve diferenças significativas nos níveis de CK (p= 0,3514) e força muscular (p= 0,9702). A DMIT transcorreu como esperado, mas sem diferença significativa entre os grupos (p= 0,4861). Estes dados demonstraram que a ETCC não foi capaz de modular a DMIT e a diminuição da força muscular após o DMIE em jovens aparentemente saudáveis

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The complex human behavior related to exercise involves cognitive, physical and emotional processing. The recent theories about exercise s intensity regulation have highlighted the role played by psychophysics aspects in controlling exercise s intensity. In this regard, recent evidences have shown that there is variability in human capacity in perceiving interoceptives clues. Thus, subjects more sensitive show higher physiological arousal to physical and/or emotional stress, and sensations with higher intensity. In fact, studies have evidenced that interoceptive feedback modifies behavior in exercise with free load. However, exercise recommendations are based in a constant load standard. Therefore, we aimed to analyze the influence of interoceptive sensibility on psychophysics responses during dynamic exercise performed with constant load. Twenty-four adult males were allocated into two groups accordingly with their interoceptive sensibility: high sensibility (n=11) and low sensibility (13). They underwent to an incremental test (IT) and then randomly to two sections of moderate and severe exercise intensity for 20 minutes. Heart rate (HR), rating of perceived exertion (RPE), affective feelings (AF), alert state (AS), and percentage of associative thoughts were collect during exercise. A two-way ANOVA with repeated measures was used to assess differences between psychophysics responses. There were differences between group in RPE, AF, and AS in moderate intensity. There was no difference in any measure in severe intensity. We conclude that subjects with high interoceptive sensibility feel dynamic moderate exercise more intense than the subjecs with low interoceptive sensibility

Relevância:

20.00% 20.00%

Publicador:

Resumo:

This work present a interval approach to deal with images with that contain uncertainties, as well, as treating these uncertainties through morphologic operations. Had been presented two intervals models. For the first, is introduced an algebraic space with three values, that was constructed based in the tri-valorada logic of Lukasiewiecz. With this algebraic structure, the theory of the interval binary images, that extends the classic binary model with the inclusion of the uncertainty information, was introduced. The same one can be applied to represent certain binary images with uncertainty in pixels, that it was originated, for example, during the process of the acquisition of the image. The lattice structure of these images, allow the definition of the morphologic operators, where the uncertainties are treated locally. The second model, extend the classic model to the images in gray levels, where the functions that represent these images are mapping in a finite set of interval values. The algebraic structure belong the complete lattices class, what also it allow the definition of the elementary operators of the mathematical morphology, dilation and erosion for this images. Thus, it is established a interval theory applied to the mathematical morphology to deal with problems of uncertainties in images

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The idea of considering imprecision in probabilities is old, beginning with the Booles George work, who in 1854 wanted to reconcile the classical logic, which allows the modeling of complete ignorance, with probabilities. In 1921, John Maynard Keynes in his book made explicit use of intervals to represent the imprecision in probabilities. But only from the work ofWalley in 1991 that were established principles that should be respected by a probability theory that deals with inaccuracies. With the emergence of the theory of fuzzy sets by Lotfi Zadeh in 1965, there is another way of dealing with uncertainty and imprecision of concepts. Quickly, they began to propose several ways to consider the ideas of Zadeh in probabilities, to deal with inaccuracies, either in the events associated with the probabilities or in the values of probabilities. In particular, James Buckley, from 2003 begins to develop a probability theory in which the fuzzy values of the probabilities are fuzzy numbers. This fuzzy probability, follows analogous principles to Walley imprecise probabilities. On the other hand, the uses of real numbers between 0 and 1 as truth degrees, as originally proposed by Zadeh, has the drawback to use very precise values for dealing with uncertainties (as one can distinguish a fairly element satisfies a property with a 0.423 level of something that meets with grade 0.424?). This motivated the development of several extensions of fuzzy set theory which includes some kind of inaccuracy. This work consider the Krassimir Atanassov extension proposed in 1983, which add an extra degree of uncertainty to model the moment of hesitation to assign the membership degree, and therefore a value indicate the degree to which the object belongs to the set while the other, the degree to which it not belongs to the set. In the Zadeh fuzzy set theory, this non membership degree is, by default, the complement of the membership degree. Thus, in this approach the non-membership degree is somehow independent of the membership degree, and this difference between the non-membership degree and the complement of the membership degree reveals the hesitation at the moment to assign a membership degree. This new extension today is called of Atanassov s intuitionistic fuzzy sets theory. It is worth noting that the term intuitionistic here has no relation to the term intuitionistic as known in the context of intuitionistic logic. In this work, will be developed two proposals for interval probability: the restricted interval probability and the unrestricted interval probability, are also introduced two notions of fuzzy probability: the constrained fuzzy probability and the unconstrained fuzzy probability and will eventually be introduced two notions of intuitionistic fuzzy probability: the restricted intuitionistic fuzzy probability and the unrestricted intuitionistic fuzzy probability

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The Support Vector Machines (SVM) has attracted increasing attention in machine learning area, particularly on classification and patterns recognition. However, in some cases it is not easy to determinate accurately the class which given pattern belongs. This thesis involves the construction of a intervalar pattern classifier using SVM in association with intervalar theory, in order to model the separation of a pattern set between distinct classes with precision, aiming to obtain an optimized separation capable to treat imprecisions contained in the initial data and generated during the computational processing. The SVM is a linear machine. In order to allow it to solve real-world problems (usually nonlinear problems), it is necessary to treat the pattern set, know as input set, transforming from nonlinear nature to linear problem. The kernel machines are responsible to do this mapping. To create the intervalar extension of SVM, both for linear and nonlinear problems, it was necessary define intervalar kernel and the Mercer s theorem (which caracterize a kernel function) to intervalar function