Curva dose-resposta do exercício em hipertensos: análise do número de sessões para efeito hipotensor

Paulo Ricardo Nazário Viecili, Daiana Cristine Bündchen, Cleusa Maria Richter, Thiago Dipp, Daciano Bastos Lamberti, Angela Maria Reis Pereira, Luciana de Castro Barbosa, Angélica Cunha Rubin, Evanilda Goulart Barbosa, Tiago Facchini Panigas
2009 Arquivos Brasileiros de Cardiologia  
The effect of exercise on blood pressure (BP) is already known; however, the dose-response curve of the hypotensive effect of exercise in hypertensive individuals is yet to be clarified. Objective: To evaluate the dose-response curve of the number of sessions that are necessary to cause a hypotensive effect in hypertensive individuals. Methods: 88 individuals, aged 58 ± 11 years, divided in Experimental group (EG), with 48 that participated in a physical exercise program (PEP), which consisted
more » ... ), which consisted of 40 minutes of aerobic exercises performed 3x/week, for 3 months, at 70% of the VO 2 max, and muscular exercises at 40% of the maximal voluntary contraction (MVC) and Control Group (CG) with 40 individuals that did not participate in the PEP. The systolic (SAP) and diastolic (DAP) arterial pressures were measured before each of the 36 sessions in the EG and assessed by ambulatory blood pressure monitoring (ABPM) in the CG. Differences in BP, the variation rate (D%) and the maximum hypotensive effect (MHE%) were observed between sessions. The data were expressed as means ± SD; the t test and correlation were used, with p<0.05 being considered significant. Results : There was no difference regarding BP values in the CG. The EG showed an important decrease of 15 mmHg in SAP and 7 mmHg in DAP, with a large part of this effect occurring as early as the first session and the majority up to the 5 th session. There was a strong inverse correlation (R:-0.66) with the number of sessions. Conclusion: An important hypotensive effect was observed from the 1 st session on and it was observed that the doseresponse curve can be abrupt and decrescent, instead of flat. (Arq Bras Cardiol 2009;92(5):361-367)
doi:10.1590/s0066-782x2009000500010 pmid:19629292 fatcat:px2hiognlnh77ekmgh3rxbqtsi