Arterial Function After Two Different Physical Exercise Intensities in Prehypertension

Summary

Individuals with prehypertension, diagnosed according to the 7th Brazilian Guidelines on Hypertension with the presence of systolic blood pressure (SBP) between 121 and 139 and / or diastolic (DBP) between 81 and 89 mmHg, are more likely to become hypertensive and to develop cardiovascular complications. Moreover, they already have alterations in the function of large arteries that may play a role in the development of the disease in the future. An option in the prevention / treatment of hypertension is the moderate intensity physical training, but high intensity interval training offers the possibility of greater exercise adherence, since it can be performed with less volume and less time spent, with the same benefits than moderate exercise, or even higher, being preferred by the population. Among these benefits, the investigators can mention the post-exercise hypotension (PEH) which occurs in normotensive, prehypertensive, and hypertensive individuals, due the decreased in sympathetic nerve activity and improved in vascular function. Also, selected participants with prehypertension can present a profile of masked hypertension, identified only by 24 hours ambulatory BP monitoring (ABPM). Given the possible differences between vascular responses to exercise intensities, the investigators intend to compare, in prehypertensive patients, the vascular responses of large arteries by noninvasive methods and PEH to a session of high intensity exercise and a session of moderate intensity continuous exercise. In addition, to study some of the possible physiological variables involved in this response by measuring heart rate variability. It is expected to find differences in vascular responses according to the presence of masked hypertension. Twenty two prehypertensive individuals aged between 30 and 60 years of both sexes will be studied. Subjects will perform cardiopulmonary testing and baseline vascular measurements (central pressure and pulse wave velocity measurements by three different methods), as well as 24 -hour ABPM. The vascular measurements will be repeated immediately after, and 24 hours after each session. Each participant will perform the session of one type of exercise in one day, and after three days will perform the other, with random distribution to the sequence of exercise type. Participants will perform 24-hour ABPM prior to exercise and for 24 hours after each exercise session. Data will be compared by appropriate statistical analysis.

Conditions

• Prehypertension
• Masked Hypertension

Interventions

BEHAVIORAL

Moderate intensity continuous training - session

Moderate exercise continuous exercise 30 minuts session

BEHAVIORAL

High intensity interval training - session

The high intensity interval exercise sessions are isocaloric to the moderate intensity continuous exercise, therefore, the necessary exercise time equivalent to 30 minutes of the moderate exercise continuous exercise session was calculated.

Sponsors & Collaborators

• Conselho Nacional de Desenvolvimento Científico e Tecnológico

  collaborator OTHER_GOV

• University of Sao Paulo General Hospital

  lead OTHER

Principal Investigators

• Luiz Bortolotto · Heart Institute (InCor), Hospital das Clinicas do HCFMUSP

Study Design

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

NONE

Model

CROSSOVER

Eligibility

Min Age

30 Years

Max Age

60 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2018-07-03

Primary Completion

2021-10-31

Completion

2023-07-31

Countries

• Brazil

Study Locations