Cardiovascular Responses To Postural Change And Aerobic Capacity In Middle-aged Men And Women Before And After Aerobic Physical Training

Abstract

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 &ampWilkins;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