Rodríguez PA, Guirado BO, Paz GHJ, Cárdenas RAE

Language: Spanish
References: 0
Page: 228-237
PDF size: 195.41 Kb.

ABSTRACT

Introduction: a number of adjustments of the cardiovascular system are required during isometric exercise; variations in the components involved in pressor response result controversial.
Objective: to determine hemodynamic variables under basal conditions and during isometric exercise in normotensive, pre-hypertensive and hypertensive young people, as well as, to determine whether differences attributable to the gender exist.
Methods: sample was constituted by 97 young people of both genders, with an average age of 19 years, whom the test of the sustained weight was applied in supine decubitus position with noninvasive hemodynamic monitoring by impedance cardiography.
Results: significantly superior values of heart rate and cardiac index were obtained in prehypertensive and normotensive women in basal conditions, and after the exercise. Resistance index was higher in pre-hypertensive and normotensive men in both conditions. Women achieved higher heart rate increments than men during isometric exercise. Systemic vascular resistance and resistance index were increased in all groups of both genders, mainly in normotensive men.
Conclusions: in basal conditions, women had higher values of hemodynamic variables related to cardiac activity and men related to vascular tone. Differences between both genders remained during isometric exercise, and the increased blood pressure was mainly due to the increase of systemic vascular resistance.