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Search Results: 1 - 10 of 7707 matches for " Teste físico. "
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Can neuromuscular fatigue threshold bedetermined by short and non-exhaustive bouts?. DOI: http://dx.doi.org/10.5007/1980-0037.2012v14n3p254
Eduardo Bodnariuc Fontes,Alexandre Hideki Okano,Bruno de Paula Smirmaul,Leandro Ricardo Altimari
Revista Brasileira de Cineantropometria e Desempenho Humano , 2012,
Abstract: The present study determined the neuromuscular fatigue threshold (NFT) using four different time-periods of analysis of the electromyographic signal and compared these estimations with critical power (CP). Fifteen healthy young men (73.6 ± 5.1 kg, 177.8 ± 7.0 cm, 23.4 ± 5.2 years) performed 3-4 different severe constant workload trials until exhaustion on a cycle ergometer with simultaneous SEMG signals acquisition. The obtained data permitted NFT estimation with four different periods of analysis as follows: initial 30s (T30), 1min (T1), 2min (T2) and total time (TT), as well as CP. T30 and T1 were significantly higher than TT and CP and, T2 and TT did not differ between each other, and both were significantly higher than CP. In addition, TT was significantly correlated to CP (0.72; P < 0.05) and to T2 (0.58; P < 0.05). We conclude that NFT overestimates CP, independent of the time-period analysis used for its determination.
Comparison between two motor tests used for muscular strength/endurance analysis
Edilson Serpeloni Cyrino,Danilo Rodrigues Pereira da Silva,Gabriel Grizzo Cucato,Juliano Casonatto
Revista Brasileira de Cineantropometria e Desempenho Humano , 2013, DOI: http://dx.doi.org/10.5007/1980-0037.2013v15n3p315
Abstract: The aim of this study was to compare motor performance in modified pull-up (MPU)and flexed knee push-up (FKPU) tests in young women. Thirty-five apparently healthy women (20.1±2.2 years) were submitted to each one of the tests at an interval of48 hours in a random balanced design. Most individuals performed between 0 an d 10 repetitions (86%) of the MPU test, and approximately 17% did not perform even one repetitions. On the other hand, the highest prevalence of outcomes for the FKPUtest was between 16 and 35 repetitions (71%). The Wilcoxon test identified statistically significant differences (p<0.01) on motor performance in the tests analyzed (FKPU > MPU). A moderate agreement (kappa =0.40) was found between the performance in both tests. Negative correlations of low magnitude (r=-0.23 to 0.46) were found between morphological variables (body weight,height, fat mass, and lean body mass) and motor performance in both tests. The results suggest that the FKPU test is presented as a better indicator ofmuscular endurance levels, where as the MPU test seems to better discriminate muscular strength in young women.
Fidedignidade intra e interdias do teste de exercício de quatro segundos
Araújo Claudio Gil Soares de,Ricardo Djalma Rabelo,Almeida Marcos Bezerra de
Revista Brasileira de Medicina do Esporte , 2003,
Abstract: O teste de exercício de quatro segundos (T4s) é validado farmacologicamente para a avalia o da fun o vagal cardíaca e consiste em pedalar, o mais rápido possível, um cicloerg metro sem carga do quarto ao oitavo segundo de uma apnéia inspiratória máxima de 12 segundos. Um índice vagal cardíaco (IVC) adimensional é obtido pelo quociente entre a dura o dos ciclos cardíacos (intervalos RR no eletrocardiograma) imediatamente antes e o mais curto do exercício. Objetivou-se determinar a fidedignidade inter e intradia do T4s e a necessidade de realizar duas tentativas, conforme descrito no protocolo original. No estudo 1, analisou-se prospectivamente a fidedignidade interdias dos resultados de 15 indivíduos assintomáticos (28 ± 6 anos) submetidos ao T4s por cinco dias seguidos, sendo realizadas duas tentativas a cada dia. Para determinar a fidedignidade intradia do IVC, foram realizadas, randomicamente em um dos dias, nove tentativas consecutivas do T4s. No estudo 2, calculou-se, retrospectivamente, a fidedignidade intradia do IVC de 1.699 indivíduos (47 ± 17 anos) em duas tentativas. O IVC apresentou elevada fidedignidade intradia e interdias (r i = 0,92; IC 95% = 0,84 a 0,97 e r i = 0,77; IC 95% = 0,49 a 0,92, respectivamente) no estudo 1, assim como, no estudo 2 (r i = 0,89; IC 95% = 0,88 a 0,90). Apesar da elevada fidedignidade, havia mínimas diferen as entre as médias (média ± EPM = 1,32 ± 0,01 vs. 1,37 ± 0,01; p < 0,001), sendo que em apenas 15% dos casos essa diferen a foi maior do que 0,20, n o representando, assim, maior relevancia clínica. Verificou-se, ainda, que, em 65% das observa es, a segunda tentativa foi considerada a melhor e que a realiza o de apenas uma induziria a erros de interpreta o clínica em 27% dos dados. Em síntese, este estudo demonstrou a elevada fidedignidade do IVC avaliado pelo T4s, além de justificar a necessidade de realizar duas tentativas consecutivas em seu protocolo.
Efectos del ejercicio físico aeróbico sobre algunos mecanismos de defensa humanos Effects of aerobic exercise on some human defense mechanisms
Domingo Caraballo Gracia,Ofelia Chacon
Iatreia , 1992,
Abstract: Se hace una descripción somera de los cambios que tienen lugar en los mecanismos de defensa Inmunes y no Inmunes como resultado de la práctica del ejercicio físico aeróbico; se Incluyen cambios cualitativos y cuantitativos en los leucocitos polimorfonucleares, en los monocitos y en las diferentes poblaciones de Linfocitos. Se alude también a los cambios en la flora normal ya otras alteraciones de la piel que pueden favorecer la presencia de infección en los deportistas. This is a brief description of the changes that may take place in the immune and non-immune mechanisms of defense as a result of the practice of aerobic sports; It includes qualitative and quantitative changes in the different kinds of white blood cells as well as alterations of the skin that may favor infections in sportspersons.
Avalia o do registro do exame físico realizado por doutorandos e residentes no Servi o de Medicina Interna do Hospital S o Lucas - PUCRS
Barrios, Carlos Henrique et al.
Scientia Medica , 2005,
Abstract: Objetivo: Neste estudo avaliamos o registro de determinados segmentos do exame físico realizado por acadêmicos do 6o ano e médicos residentes em pacientes internados na unidade de Medicina Interna no Hospital S o Lucas da PUCRS. Métodos: Seguindo um protocolo previamente estabelecido, foram avaliados retrospectivamente 120 prontuários escolhidos de forma aleatória, entre o período de janeiro de 2000 a mar o de 2002. Resultados: Embora alguns segmentos do exame s o registrados em mais de 90% dos casos (exame cardiovascular, pulmonar e abdominal), o exame é incompleto em todos os prontuários. O exame neurológico exemplifica um problema particularmente sério que identificamos nesta avalia o. Mesmo em pacientes que apresentam sintomas ou queixas neurológicas o exame n o é realizado ou registrado adequadamente. Alguns segmentos específicos como exame de linfonodos, tireóide, fundoscopia, otoscopia, toque retal, testículos ou mamas s o registrados somente numa minoria absoluta dos casos. Conclus o: Entendemos que a falta de modelo e orienta o por parte do corpo de professores é o principal motivo que explica esta situa o. A necessidade de reverter esta realidade, desenvolvendo estratégias eficazes é imperativa.
Imers?o em água quente no controle pós-colheita da podrid?o branca em ma??s cv. Fuji
Lunardi, Rosangela;Sanhueza, Rosa M. V.;Bender, Renar J.;
Fitopatologia Brasileira , 2003, DOI: 10.1590/S0100-41582003000400015
Abstract: the objective of the present study was to evaluate the efficacy of heat treatments on the control of white rot caused by botryosphaeria dothidea on 'fuji' apples (malus domestica). apples were immersed for either 1, 2 or 3 min in hot water at 47, 49 or 52 °c. before the heat treatments, the apples were inoculated with the fungus b. dothidea. after the treatments, apples were stored at 0-1 °c in controlled atmosphere (ca) with 1.2 - 1.6 kpa o2 and 0.2 - 0.4 kpa co2 or in refrigerated air storage for one, three or five months. after each storage period, samples were transferred to room temperature for seven days and evaluated for lesion diameter and quality parameters. hot water heat treatment at 47 °c for 3 min reduced lesion diameter of fuji apples under ca storage. the ca storage resulted in better quality apples.
Imers o em água quente no controle pós-colheita da podrid o branca em ma s cv. Fuji
Lunardi Rosangela,Sanhueza Rosa M. V.,Bender Renar J.
Fitopatologia Brasileira , 2003,
Abstract: O objetivo do presente trabalho foi determinar o efeito do tratamento com água quente no controle da podrid o branca (Botryosphaeria dothidea) em ma s (Malus domestica) cv. Fuji. Os tratamentos foram combina es de três tempos de imers o em água quente (1, 2, e 3 min) e três temperaturas da água (47, 49 e 52 °C), utilizando frutos inoculados com o patógeno. As ma s foram armazenadas na temperatura de 0-1 °C em atmosfera controlada (AC) de 1,2 a 1,6 kPa de O2 e 0,2 a 0,4 kPa de CO2 e em ar refrigerado (AR). As amostras armazenadas foram avaliadas ao final um, três e cinco meses em AC ou AR mais sete dias em temperatura ambiente. Avaliou-se o diametro de les o e variáveis da qualidade dos frutos. Os tratamentos de imers o em água quente reduziram o tamanho das les es das ma s quando o tratamento foi de 47 °C por 3 min em armazenamento em AC. A armazenagem em AC manteve melhores as características qualitativas das ma s.
Mens sana in corpore sano
Daniel Sanabria
Ciencia Cognitiva : Revista Electrónica de Divulgación , 2010,
Abstract: La práctica de ejercicio físico mejora la salud cardiovascular y respiratoria. Sin embargo, el efecto del ejercicio físico sobre el rendimiento cognitivo es menos conocido. Revisamos aquí brevemente el estado de la investigación actual en el ámbito de la relación entre ejercicio físico y rendimiento cognitivo.
Viabilidade de Sclerotinia sclerotiorum após a solariza??o do solo na presen?a de cobertura morta
Ferraz, Leila C. L.;Bergamin Filho, Armando;Amorim, Lilian;Nasser, Luiz C. B.;
Fitopatologia Brasileira , 2003, DOI: 10.1590/S0100-41582003000100003
Abstract: the effects of temperatures and crop mulch on topsoil in the inactivation of the sclerotia of sclerotinia sclerotiorum were studied by oven heating in three field experiments during three months. field experiments were performed in piracicaba and in brasília. sclerotia were produced in a carrot+cornmeal medium, incorporated into the soil (oven-heating), conditioned in nylon bags, and buried in the soil at 5, 10 and 30 cm (field). the soil treatments in the field were: solarization (s), non-solarization (ns), and solarized soil added to crop mulch (ps). sclerotia samples were collected every 30 days to observe the viability and presence of contaminants in neon medium. the oven heating of the soil at 50 and 60o c and the use of diverse crop mulch inactivated the sclerotia, which had a higher incidence of contaminants. in the field, the effect of soil solarization was significant. the sclerotia were killed in s after 90 days at three depths in the first experiment and in ps after 60 days at 5 and 10 cm in the other two experiments. the incidence of contaminants in sclerotia in solarized soils was significantly higher in s, followed by ps; however, a greater variability of contaminants was observed in ps. temperatures of the soil in ps were higher when compared to the other treatments at the same depth. this factor reduced the inactivating time of the sclerotia from 90 days in s, to 60 days in ps.
Solariza??o para controle de Phytophthora parasitica em mudas de citros
MAY-DE MIO, LOUISE L.;GHINI, RAQUEL;KIMATI, HIROSHI;
Fitopatologia Brasileira , 2002, DOI: 10.1590/S0100-41582002000300003
Abstract: solarization has been efficient in controlling soil borne pathogens. phytophthora parasitica, the causal agent of root rot in citrus (citrus spp.) nurseries, is usually treated by using methyl bromide for soil disinfestations. this product is highly toxic to man as well as to the soil microbial community. solarization was efficient in both winter and summer p. parasitica pre-colonized substratum. the winter experiment was arranged in a randomized block design with eight treatments (solar collector 24 h and 48 h, plastic bag 24 h and 48 h, solar collector 48 + trichoderma spp., trichoderma spp., inoculated and non-inoculated control at shadow), with four repetitions using 15 plants/parcel. inoculated treatments were solarized and used to fill the containers where seedlings were transplanted. evaluation was made by means of bait test for recovering pathogen and by citrus seedling development three months later. for summer solarization, the effect in plastic bags was evaluated at one, two, seven and 14 days. this evaluation was made by bait test. results showed that the solarization of substratum for seedling production eliminates p. parasitica in solar collectors (10-cm-diameter containers) for 24 h in winter as well as in summer (allowing a better seedling growth), and in plastic bags (20 x 25 x 4 cm3) for 48 h in summer.
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