1000 resultados para ritmo cardíaco
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The aim of this study was to analyze the influence of prior exercise on different intensity distribution strategies (pacing). The study included five male individuals, apparently healthy, aged between 18 and 25 years, and without regular practice of physical activities. The subjects were tested on different days following the protocols on a cycle ergometer: 1) a progressive ramp test, 2) three constant load tests in the intensities of 85%, 90% and 95% IVO2max to exhaustion, and 3) six tests with and without holding a prior exercise intensity of 70% with different strategies for Even-intensity pace, ES (401 ± 70 W), which consists of an exercise at a pace and / or constant intensity from beginning to end; where intensity is initially increased to 10% less than the ES progressively increase to reach 10% above the intensity of ES, and; Fast-start; FS, where there is a reversal in the way of distributing intensity, ie the initial intensity is 10% higher than the value of ES decreased progressively to 10% below that ES. All these tests were performed in random order. The tlim with previous exercise was significantly shorter than without previous exercise at FS condition (p < 0.05). The VO2final obtained at ES condition was similar with (3243 ± 599 ml.min-1) and without (3252 ± 384 ml.min-1) previous aerobic exercise (p > 0.05). However, the VO2final obtained at FS condition was higher with (3291 ± 218 ml.min-1) than without (3097 ± 207 ml.min-1) previous aerobic exercise (p < 0.05). The heart rate was higher at ES condition with than without previous aerobic exercise (p < 0.05). There was no significant difference in this variable for FS condition with and without previous aerobic exercise (p > 0.05). It can be concluded that the results the previous exercise (70%) achieved lasting 6 minutes followed by 6 minutes of recovery appears to influence / commit ting the conditions during the pacing for this population
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Maternal smoking during pregnancy causes heart changes, impaired fetal growth, spontaneous abortion and low birth weight. Even in pregnant women exposed to cigarette smoke these changes can be observed. But the exercise is to answer the increased fetal weight, besides the improvement of cardiorespiratory fitness of the pregnant and the fetus. The objective of this study was to analyze the ventricular muscle of young rats subjected to passive smoking associated with aquatic exercise. For the experiments used 24 female rats were divided into: GC (control), GE (exercise protocol in the water), GF(exposed to cigarette smoke) and GEF (exercise protocol on water and exposed to cigarette smoke). On the same day was held the 1st session of the experimental phase of the protocol of exposure to cigarette smoke, which consisted of 30 minutes twice a day, six days a week for three weeks, followed by the first session of the swimming program... (Complete abstract click electronic access below)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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One of the most controversial issues in the history of Phonetics is the discussion about the typology of speech rhythm. Out of the Greek and Latin tradition on poetry versification, the notion of rhythm has been misunderstood as speech rate. In the early years of the 20th century, a dichotomy merged classifying the speech rhythm into stress-timed and syllable-timed languages, inspired by the old theory of poetic versification. Following the same old pattern, later on, a third type of language were proposed: the moraic languages, initially attributed only to Japanese. With the facilities to carry on acoustic research, in the second half of the 20th century, the typology of language rhythm came to a dead end. Different types of language were set out. This paper discusses these ideas, showing a great misunderstanding among researchers in relation to the characterization of a syllable-timed language. The notion of mora is revisited and its role in the study of speech rhythm is better defined.
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The language typology of speech rhythm has been investigated by many researchers in different languages. However, they have not reached a unanimous conclusion. Part of the misunderstanding is due to the methodology they used. In addition, there is some theoretical confusion on the definition of a syllable timed language. This paper refers to the last question, but without discussing others people works and theories. Instead, it points out some essential questions that have not been taken into consideration in the discussion.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Dexamethasone (DEXA) is a synthetic glucocorticoid widely used in the handling of several drugs, for its proven benefits in fighting inflammation and allergies. Despite their benefits, their chronic use leads to several side effects that include changes in the body in the metabolism of carbohydrates, lipids and proteins. Moreover, being an anti-inflammatory, acts on the arachidonic acid pathway, reducing the expression of the enzyme cyclooxygenase (COX-2) and growth factor derived from the endothelium of blood vessels (VEGF) in various tissues. However, its effects on the myocardium are still uncertain. The physical training (PT), in turn, promotes effects contrary to those caused by chronic use of DEXA, however, little is known about the preventive effects of TF in the side effects of Dexa in the myocardium. Therefore, the aim of this study was to determine if the TF has the ability to prevent and/or mitigate the effects of Dexa in protein expression of COX-2 and VEGF in the myocardium. Forty animals were divided into 4 groups: sedentary control (SC), sedentary treated with Dexa (SD), trained control (TC) and Trained treated with Dexa (TD) and submitted to a protocol of physical training on the treadmill for 70 days (1 h/day-5 days per week, 60% of physical capacity) or kept sedentary. Over the past 10 days, rats were treated with Dexa (Decadron, 0.5 mg/kg per day, ip) or saline. During training the animals were weighed weekly and during treatment daily. At the end of treatment was made to measure fasting glucose levels of animals. The rats were killed with excess anesthesia and cardiac muscle was removed, weighed, homogenized, centrifuged and stored at -20° C for analysis of protein expression of VEGF and COX-2 by Western blotting technique. Treatment with dexamethasone caused a weight loss of 18% in sedentary animals and 13% in trained as well as elevated levels of fasting glucose in sedentary (88%). The TF was unable to mitigate the loss in...
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A saúde e a qualidade de vida do homem podem ser preservadas e aprimoradas pela prática regular de atividade física. Assim o exercício físico tem sido cada vez mais recomendado como uma alternativa no tratamento e/ou prevenção de inúmeras doenças tais como hipertensão, doença vascular, obesidade, diabetes, osteoporose, entre outras condições clinicas. No Brasil, as doenças cardiovasculares são responsáveis por cerca de 30% de todos os óbitos, sendo o infarto agudo do miocárdio a sua principal causa. Diferentes associações de saúde no mundo, como o American College of Sports Medicine, o Nation Institutes of Health, a Sociedade Brasileira de Cardiologia, entre outras; recomendam a prática regular de atividade física para a prevenção e reabilitação de doenças cardiovasculares e outras doenças crônicas. Segundo a Organização Mundial de Saúde, reabilitação cardíaca é o somatório das atividades necessárias para garantir aos pacientes de cardiopatia as melhores condições física, mental e social que eles consigam, pelo próprio esforço, reconquistar uma posição normal na comunidade e levar uma vida ativa e produtiva. Os programas de reabilitação cardíaca têm objetivos profiláticos e terapêuticos. Entretanto, existem poucos relatos de programas de reabilitação e condicionamento físico pós-transplante cardíaco no Brasil. Dessa forma, o objetivo deste trabalho é realizar uma revisão de literatura demonstrando o papel da prática regular de atividade física na reabilitação e condicionamento físico após o transplante cardíaco
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Pós-graduação em Biotecnologia Animal - FMVZ