488 research outputs found
Entretien avec le collectif Catai : de Catai à Berta en passant par Potere al Popolo.
Cet entretien naît du souhait de connaître et de faire connaître l’histoire du collectif padouan Catai, de réfléchir avec ses membres sur leur trajet pendant les quatre ans de vie de l’association, de comprendre la définition des objectifs, l’évolution et les perspectives de ce projet
Bi-level positive airway pressure produces an increase of sympathetic response in healthy young men
Intervista con il Catai: dal Catai a Berta passando per l’adesione a Potere al popolo.
Questa intervista nasce dal desiderio di conoscere e far conoscere la storia del collettivo padovano Catai, di riflettere con i suoi membri sul loro percorso durante i quattro anni di vita del gruppo, di capire la definizione degli obiettivi l’evoluzione e le prospettive del gruppo
Reproducibility of peripapillary retinal nerve fiber layer thickness measurements using Spectral Domain OCT in Brazilian patients
Cardiovascular responses to postural change and aerobic capacity among middle-aged men and women before and after aerobic physical training
OBJETIVO: Comparar respostas cardiovasculares a Manobra Postural Passiva (Tilt Test) e capacidade cardiorrespiratória em homens e mulheres de meia-idade antes e após treinamento físico aeróbio. MATERIAIS E MÉTODOS: Sete homens - GH (44,6±2,1 anos) e sete mulheres - GM (51,7±4,8 anos), participaram de treinamento físico aeróbio por 12 semanas. Foi realizado protocolo de Tilt Test (cinco minutos supino, dez minutos inclinado 70º, cinco minutos supino), com monitoração da pressão arterial e freqüência cardíaca. Para mensuração da capacidade cardiorrespiratória foi realizado protocolo em cicloergômetro. RESULTADOS: Na condição sedentária, GH mostrou maior influência parassimpática no controle da freqüência cardíaca evidenciada por maior intervalo RR (iRR) durante Tilt Test. Na condição treinada, os valores de iRR de ambos os grupos se assemelham, tendo as mulheres iRR maior em supino, mas na inclinação os homens mantêm iRR mais elevado. Para pressão arterial, as mulheres permanecem com valores superiores após treino, mas a freqüência cardíaca tende a se assemelhar em ambos. Já na capacidade cardiorrespiratória, homens e mulheres têm um padrão de comportamento semelhante após treino. Com exceção dos valores absolutos da freqüência cardíaca, sem diferenças entre os grupos, para todas as outras variáveis os homens obtiveram valores superiores aos das mulheres. Observa-se ainda que, após o treinamento, houve redução significativa dos valores de pressão arterial no GM, mesmo continuando superiores aos dos homens. CONCLUSÃO: O treinamento parece ter reduzido os níveis pressóricos nas mulheres, além de serem observadas melhorias na capacidade cardiorrespiratória de ambos os grupos, permanecendo os homens com melhor desempenho do que as mulheres.OBJECTIVE: To compare the cardiovascular responses to passive postural maneuvers (tilt test) and the cardiorespiratory capacity in middle-aged men and women, before and after aerobic physical training. METHODS: Seven men (44.6±2.1 years old) and seven women (51.7±4.8 years old) participated in aerobic physical training for 12 weeks. The tilt test protocol (five minutes supine, ten minutes tilted at 70º and five minutes supine) was followed, with arterial blood pressure and heart rate monitoring. A cycle ergometer protocol was used to measure cardiorespiratory capacity. RESULTS: In the sedentary condition, men showed greater parasympathetic influence in heart rate control, as demonstrated by their higher RR interval (iRR) during the tilt test. After training, the iRR values became more similar in the two groups, although the women had higher iRR in the supine position and the men continued to present higher iRR under tilted conditions. The women's blood pressures continued to be higher after training, but heart rate tended to become similar in the two groups. The cardiorespiratory capacity patterns in the two groups were similar after training. Except for absolute heart rate values, for which there were no differences between the groups, the men's values were higher than those of the women for all other variables. It was also observed that, after the training, the women's blood pressures were significantly lower, even though their pressures remained higher than the men's. CONCLUSIONS: The training seemed to reduce the women's arterial blood pressure levels and improve both groups' cardiorespiratory capacity, but the men continued to present better performance than the women
Cardiovascular Responses To Postural Change And Aerobic Capacity In Middle-aged Men And Women Before And After Aerobic Physical Training
Objective: To compare the cardiovascular responses to passive postural maneuvers (tilt test) and the cardiorespiratory capacity in middle-aged men and women, before and after aerobic physical training. Methods: Seven men (44.6±2.1 years old) and seven women (51.7±4.8 years old) participated in aerobic physical training for 12 weeks. The tilt test protocol (five minutes supine, ten minutes tilted at 70° and five minutes supine) was followed, with arterial blood pressure and heart rate monitoring. A cycle ergometer protocol was used to measure cardiorespiratory capacity. Results: In the sedentary condition, men showed greater parasympathetic influence in heart rate control, as demonstrated by their higher RR interval (iRR) during the tilt test. After training, the iRR values became more similar in the two groups, although the women had higher iRR in the supine position and the men continued to present higher iRR under tilted conditions. The women's blood pressures continued to be higher after training, but heart rate tended to become similar in the two groups. The cardiorespiratory capacity patterns in the two groups were similar after training. Except for absolute heart rate values, for which there were no differences between the groups, the men's values were higher than those of the women for all other variables. It was also observed that, after the training, the women's blood pressures were significantly lower, even though their pressures remained higher than the men's. Conclusions: The training seemed to reduce the women's arterial blood pressure levels and improve both groups' cardiorespiratory capacity, but the men continued to present better performance than the women.125392400Pollock, M.L., Dawson, G.A., Physiologic responses of men 49 to 65 years of age to endurance training (1976) J Am Geriatr Soc, 24 (3), pp. 97-104Haddock, B.L., Marshak, H.P.H., Mason, J.J., Blix, G., The effect of hormone replacement therapy and exercise on cardiovascular disease risk factors in postmenopausal women (2000) Sports Med, 29 (1), pp. 39-49Liu, C.C., Kuo, T.B., Yang, C.C., Effects of estrogen on gender-related autonomic differences in humans (2003) Am J Physiol Heart Circ Physiol, 285 (5), pp. H2188-H2193Rosano, G.M., Vitale, C., Fini, M., Hormone replacement therapy and cardioprotection: What is good and what is bad for the cardiovascular system? (2006) Ann. N.Y. Acad Sci, 1092, pp. 341-348Ghorayeb N, Baptista CA, Dioguardi GS, Reginatto LE. Atividade física na mulher. Rev Soc Cardiol Est São Paulo, SOCESP.1996;6:540-2Kannel, W.B., Hjortland, M.C., McNamara, P.M., Gordon, T., Menopause and risk of cardiovascular disease: The Framingham study (1976) Ann Intern Med, 85 (4), pp. 447-452Tank, J., Does aging cause women to be more sympathetic than men? (2005) Hypertension, 45 (4), pp. 489-490Kuttenn, F., Gerson, M., Hormone replacement therapy of menopause, heart and blood vessels (2001) Arch Mal Coeur Vaiss, 94 (7), pp. 685-689Vanoli, E., De Ferrari, G.M., Stramba-Badiale, M., Hull Jr, S.S., Foreman, R.D., Schwartz, P.J., Vagal stimulation and prevention of sudden death in conscious dogs with a healed myocardial infarction (1991) Circ Res, 68 (5), pp. 1471-1481Smith, J.J., Kampine, J.P., (1990) Regulation of arterial blood pressure, , editores. Circulatory physiology, the essentials. 3aed. Baltimore: Williams &Wilkins;Kuo, T.B., Lin, T., Yang, C.C., Li, C.L., Chen, C.F., Chou, P., Effect of aging on gender differences in neural control of heart rate (1999) Am J Physiol, 277 (6 PART 2), pp. H2233-H2239Evans, J.M., Ziegler, M.G., Patwardhan, A.R., Ott, J.B., Kim, C.S., Leonelli, F.M., Gender differences in autonomic cardiovascular regulation: Spectral, hormonal, and hemodynamic indexes (2001) J Appl Physiol, 91 (6), pp. 2611-2618Pikkujämsä, S.M., Mäkikallio, T.H., Airaksinen, K.E., Huikuri, H.V., Determinants and interindividual variation of R-R interval dynamics in healthy middle-aged subjects (2001) Am J Physiol Heart Circ Physiol, 280 (3), pp. H1400-H1406Neves, V.F., Silva de, S.M., Gallo Jr, L., Catai, A.M., Martins, L.E., Crescêncio, J.C., Autonomic modulation of heart rate of young and postmenopausal women undergoing estrogen therapy (2007) Braz J Med Biol Res, 40 (4), pp. 491-499(2005) ACSM's guidelines for exercise testing and prescription/ACSM, , American College of Sports Medicine, Philadelphia: Lippincott Williams & Wilkins;Maciel, B.C., Gallo Júnior, L., Marin Neto, J.A., Lima Filho, E.C., Terra Filho, J., Manço, J.C., Parasympathetic contribution to bradycardia induced by endurance training in man (1985) Cardiovasc Res, 19 (10), pp. 642-648Martinelli, F.S., (1996) Respostas da freqüência cardíaca e da pressão arterial sistêmica às manobras postural passiva e de valsalva, em indivíduos sedentários e atletas corredores de longa distância, , dissertação, Campinas: Unicamp;Goldsmith, R.L., Bigger Jr, J.T., Steinman, R.C., Fleiss, J.L., Comparison of 24-hour parasympathetic activity in endurance-trained and untrained young men (1992) J Am Coll. Cardiol, 20 (3), pp. 552-558Shin, K., Minamitani, H., Onishi, S., Yamazaki, H., Lee, M., Autonomic differences between athletes and nonathletes: Spectral analysis approach (1997) Med Sci Sports Exerc, 29 (11), pp. 1482-1490Seals, D.R., Taylor, J.A., Ng, A.V., Esler, M.D., Exercise and aging: Autonomic control of the circulation (1994) Med Sci Sports Exerc, 26 (5), pp. 568-576Chacon-Mikahil, M.P.T., (1998) Estudo da variabilidade da freqüência cardíaca nos domínios do tempo e da freqüência antes e após o treinamento aeróbio em homens de meia idade [tese], , Campinas: Unicamp;Laitinen, T., Niskanen, L., Geelen, G., Länsimies, E., Hartikainen, J., Age dependency of cardiovascular autonomic responses to head-up tilt test in healthy subjects (2004) J Appl Physiol, 96 (6), pp. 2333-2340Gordon, C.C., Chumlea, W.C., Roche, A.F., Stature, Recumbent Length, Weight (1988) Anthropometric standardizing reference manual, pp. 3-8. , Lohman TG et al, editores, Champaign, Illinois: Human Kinetics Books;Wasserman, K., Whipp, B.J., Koyl, S.N., Beaver, W.L., Anaerobic threshold and respiratory gas exchange during exercise (1973) J Appl Physiol, 35 (2), pp. 236-243Montano, N., Ruscone, T.G., Porta, A., Lombardi, F., Pagani, M., Malliani, A., Power spectrum analysis of heart rate variability to assess the changes in sympathovagal balance during graded orthostatic tilt (1994) Circulation, 90 (4), pp. 1826-1831Shoemaker, J.K., Hogeman, C.S., Khan, M., Kimmerly, D.S., Sinoway, L.I., Gender affects sympathetic and hemodynamic response to postural stress (2001) Am J Physiol Heart Circ Physiol, 281 (5), pp. H2028-H2035Bigger Jr, J.T., Fleiss, J.L., Steinman, R.C., Rolnitzky, L.M., Kleiger, R.E., Rottman, J.N., Correlations among time and frequency domain measures of heart period variability two weeks after acute myocardial infarction (1992) Am J Cardiol, 69 (9), pp. 891-898Almeida, M.B.E., Araújo, C.G.S., Effects of aerobic training on heart rate (2003) Rev Bras Med Esporte, 9 (2), pp. 113-120Yataco, A.R., Fleisher, L.A., Katzel, L.I., Heart rate variability and cardiovascular fitness in senior athletes (1997) Am J Cardiol, 80 (10), pp. 1389-1391Rennie, K.L., Hemingway, H., Kumari, M., Brunner, E., Malik, M., Marmot, M., Effects of moderate and vigorous physical activity on heart rate variability in a British study of civil servants (2003) Am J Epidemiol, 158 (2), pp. 135-14
DIMENSIONAMENTO E CLASSIFICAÇÃO DE RISCOS DA COLHEITA FLORESTAL EM RELEVO DECLIVOSO
A busca pela redução dos custos de produção leva as empresas florestais à procura de terras economicamente mais acessíveis para implantar suas atividades, como as áreas com declividade acentuada. Os efeitos potenciais da declividade no dimensionamento e no agravamento de riscos na colheita florestal motivaram este estudo, classificando-os para as ações e ocupações envolvidas no corte e na extração florestal. A classificação considerou as diretrizes das Normas Regulamentadoras número 9, 15, 17 e 31. Os ruídos e as temperaturas foram mensurados quantitativamente, enquanto a análise postural foi feita com auxílio do software Ergolândia 5.0, para dois métodos diferentes. Os riscos de acidentes foram determinados por bibliografia especializada com validação em campo. A ocupação motosserrista foi a que ofereceu mais riscos inerentes e maior gravidade. Para os movimentos parciais, os que apresentaram maiores riscos foram: corte da árvore, derrubada e desgalhamento. Conclui-se que a gestão eficiente de riscos é essencial para a sustentabilidade econômico-social das empresas florestais, reiterada pelos agravantes do trabalho em relevo acidentado.
Influence of the electrokinetic injection conditions on the separation of DNA fragments in capillary electrophoresis
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