Uma única sessão de mat pilates não reduz a pressão arterial após exercício em mulheres na pós menopausa

Abstract

Background: Exercise can provide reductions in blood pressure (BP) after its execution, with values below resting levels. This strategy is important in the treatment and prevention of cardiovascular diseases (CVD), especially in postmenopausal women, who have a higher incidence of CVD in this phase of life. One of the explanations for BP reduction is the bioavailability of substances such as nitric oxide, which plays an important role as a vasodilator. Autonomic system control is also a way of verifying the reduction of BP postexercise. One of the ways to control this variable is to verify the responses of heart rate variability and also Total Protein concentration. These act on autonomic stress responses and as intensity biomarker, respectively. In the Pilates method, cardiovascular responses are still not well understood, and the demand for this type of exercise has been increasing mainly among postmenopausal women. Aim: The aim of this study was to verify hemodynamic responses after Mat Pilates exercises. Material and Methods: The study counted on 16 participants, all normotensive postmenopausal women (55.3 ± 6.9 years, 27,7 ± 3,4 Kg/m2), who were submitted to four experimental sessions in random order and crossover design. These being, PILATES: ten floor exercises during 35 minutes, with a Rate of Perception of Exertion (RPE) between 11 and 14; AEROBIC: 35 minutes on the treadmill between 60 and 70%of heart rate reserve; RESISTANCE: resistance exercises at 60% of 1RM; CONTROL: no physical exercise. BP (Omron - HEM-7200) and heart rate variability (HRV) (Polar® RS800CX) were evaluated at rest and during 60 minutes after the intervention. Samples of saliva were collected at rest and immediately, 30 and 60 minutes after exercise for analysis of nitrite concentration (NO2-) and total proteins (TP). Results: The area under the curve (AUC) of BP variation was used to compare all sessions. Systolic, diastolic and mean BPs AUCs were lower (p<0,05) in both aerobic and resistance exercises sessions but not Pilates session comparing with control session NO2- concentrations in saliva were higher one hour after the end of all exercises sessions comparing with control session, which did not occur in the TP concentration. The HRV was higher after resistance session in relation to all other sessions. Conclusion: These results indicate that acute Mat Pilates session was not capable of decreasing arterial blood pressure after training.