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Dynamic Aerobic Exercise Induces Baroreflex Improvement in Diabetic Rats

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Autor(es):
Jorge, Luciana ; da Pureza, Demilto Y. ; Dias, Danielle da Silva ; Conti, Filipe Fernandes ; Irigoyen, Maria-Claudia ; De Angelis, Katia
Número total de Autores: 6
Tipo de documento: Artigo Científico
Fonte: Experimental Diabetes Research; v. N/A, p. 5-pg., 2012-01-01.
Resumo

The objective of the present study was to investigate the effects of an acute aerobic exercise on arterial pressure (AP), heart rate (HR), and baroreflex sensitivity (BRS) in STZ-induced diabetic rats. Male Wistar rats were divided into control (n = 8) and diabetic (n = 8) groups. AP, HR, and BRS, which were measured by tachycardic and bradycardic (BR) responses to AP changes, were evaluated at rest (R) and postexercise session (PE) on a treadmill. At rest, STZ diabetes induced AP and HR reductions, associated with BR impairment. Attenuation in resting diabetes-induced AP (R: 103 +/- 2 versus PE: 111 +/- 3 mmHg) and HR (R: 290 +/- 7 versus PE:328 +/- 10 bpm) reductions and BR dysfunction (R: -0.70 +/- 0.06 versus PE:-1.21 +/- 0.09 bpm/mmHg) was observed in the postexercise period. In conclusion, the hemodynamic and arterial baro-mediated control of circulation improvement in the postexercise period reinforces the role of exercise in the management of cardiovascular risk in diabetes. (AU)

Processo FAPESP: 07/57595-5 - Efeitos do treinamento físico no controle autônomo cardiovascular em fêmeas saudáveis e submetidas à privação dos hormônios ovarianos: papel do estresse oxidativo
Beneficiário:Kátia de Angelis Lobo D Avila
Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
Processo FAPESP: 07/58942-0 - Da bancada à clínica: desenvolvimento de biomarcadores como preditores da resposta à terapêutica e lesão de órgãos-alvo na hipertensão arterial sistemática
Beneficiário:Eduardo Moacyr Krieger
Modalidade de apoio: Auxílio à Pesquisa - Temático