Avaliação dos parâmetros de medida central da pressão arterial de participantes da caminhada ecológica de Goiás

Abstract

In Goiás, the Ecological walk takes place annually and is an unique event for its distance (310km) and dynamics of performance (average of 62km/day for 5 days, average speed 7.6Km/h). Although the beneficial effects of moderate exercise are well known, the effects of intense exercise with long duration, as the Ecological walk, have not been well studied. This study aimed to verify the effects of prolonged exercise in central blood pressure and the correlation of these parameters with age. A total of 25 men were included in the study. The central blood pressure was measure datbaseline (A0), on the 2nd (A2), 3rd (A3) and 4th (A4) days of walk after the daily stop for night rest. The following parameters were measured: peripheral and central systolic and diastolic blood pressure, peripheral and central pulse pressure, pulse pressure amplified, 75% augmentation index, pulse wave velocity and vascular resistance. An oscillometric device from Mobil The Graphi® (IEM Stolber, Germany) was used. To compare the parameters between the daily measurements we used ANOVA for repeated measures followed by Bonferrroni post hoc and Pearson test for correlation. We considered significant p<0.05. We assessed 25 athletes with mean age 45.3±9.1.Central systolic blood pressure, reduced from A0 (113.8±2.1mmHg) to A3 (105.7±1.6mmHg) (p=0.035) and increased from A3 (105.7±1.6mmHg) to A4 (111.5±1.6mmHg) (p=0.006). The central diastolic blood pressure reduced from A0 (80.3±1.9mmHg) to A3 (74.3±1.5mmHg) (p=0.018)and A2 (78.6±1) to A3 (74.3±1.5mmHg) (p=0.036) and increased from A3 (74.3±1.5mmHg) for A4 (78.6±1.7mmHg) (p=0.014). The peripheral systemic blood pressure decreased from A0 (127.9±2.6 mmHg) to A2 (115.6±1.9mmHg) (p=0.002); to A3 (115.6±1.7mmHg) (p=0.003) and A4 (118.6±1.5mmHg) (p=0.007). The peripheral diastolic blood pressure reduced from A0 (78.7±1.9mmHg); from A3 (73.0±1.4mmHg) (p=0.018); A2 (77.4±1.1mmHg) to A3 (73.00±1.4mmHg) (p=0.040); and increased from A3 (73.0±1.4mmHg) to A4 (77.4±1.6mmHg) (p=0.010). The variables correlated with age were the central systemic blood pressure (A0), Peripheral pulse pressure (A3) and pulse wave velocity. Blood pressure decreased in the early days of walking, returning close to baseline at the end of the competition. Pulse wave velocity was strongly correlated with age.