Post-Exercise Hypotension in Elderly Hypertensive Men (HPE)

May 29, 2018 updated by: Hospital de Clinicas de Porto Alegre

Effects of Different Exercises on Post-Exercise Blood Pressure in Elderly Hypertensive: A Cross-Over Randomized Clinical Trial

The purpose of this study is to compare the effects of two exercise protocols on post-exercise blood pressure versus a control group in elderly hypertensive men. Participants are allocated to all groups: control group and two experimental exercise protocols, in a random order. In the control group, participants remain resting sitting, and, in the exercise protocols, participants practice exercise bouts of aerobic exercise or a combination of resistance and aerobic exercises. In order to standardize baseline conditions, before the sessions subjects remain sitting quietly for 20 minutes. After each exercise protocol, participants have 60 minutes for recovery and, simultaneously, they have BP measured every 5 minutes. After the exercise sessions or control, an equipment for 24 hours ambulatory BP monitoring is installed in every participant.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Hypertension has high prevalence and low rate of control, and is a major modifiable risk factor and public health problem. Regular physical exercise is a relevant non-pharmacological option for prevention and treatment of hypertension. Several studies demonstrated a reduction in blood pressure (BP) following different exercise protocols, and the decrease may be the result of the summation of hypotensive effects that occur in the hours following the workout. The reduction resulting from a single exercise session is called post-exercise hypotension (PEH) and has been investigated among hypertensive subjects. However, to achieve clinical relevance the PEH should reach a significant magnitude and the reduction should be sustained for a longer period.

Previous studies showed the positive effects of aerobic exercise on post-exercise hypotension in hypertensive subjects. However, there is lacking evidence regarding the effects of a single session of aerobic and resistance exercise combined, and the duration of its effect in 24 hours blood pressure in elderly hypertensive subjects.

The study is an open, crossover randomized clinical trial, with elderly men allocated to three arms, in a random order:

  • Aerobic training session
  • Combined resistance training and aerobic session
  • Control session

After each exercise session, participants have 60 minutes for recovery, performed in the sitting position, with BP measurements every 5 minutes. In addition, participants have measured BP using 24h ambulatory BP monitoring. At the end of the trial, participants will have completed all three experimental protocols: a non-exercise control session, of sitting rest, and two exercise bouts, one of aerobic exercise and a combined resistance and aerobic exercise, with seven days of washout period among sessions. All experiments will be conducted at the same time of day to account for diurnal BP variation. Before the experimental sessions, participants are enrolled in three pre-intervention tests: a familiarization session, cardiopulmonary exercise testing and one maximum repetition strength test (1RM). The aerobic sessions last for 45 minutes, as well as the resistance exercises, and the session of control.

Study Type

Interventional

Enrollment (Actual)

20

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Brazil
    • Rio Grande Do Sul
      • Porto Alegre, Rio Grande Do Sul, Brazil, 90035-903
        • Hospital de Clínicas de Porto Alegre

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

60 years to 70 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Male

Description

Inclusion Criteria:

  • Essential hypertension grade 1 - 2 with or without medical treatment:

resting systolic blood pressure (SBP) ≥ 140 mmHg or diastolic blood pressure (DBP) ≥ 90 mmHg

Exclusion Criteria:

  • Smoking;
  • Bone, joint, or muscle problems that could limit the performance of the exercises.
  • BMI ≥ 30 kg/m2
  • Heart Attack in the last year

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Aerobic exercise
Aerobic exercise on treadmill at 65-70% of the heart rate reserve during a session.
Other: Aerobic exercise
Aerobic exercise on treadmill
Experimental: Combined exercises
A session combines resistance and aerobic exercises, with aerobic exercise on treadmill at 65-70% of the heart rate reserve, followed by 60 minutes for cardiorespiratory recovery, and resistance exercise.
Other: Combined exercises
Combined resistance and aerobic exercise
Sham Comparator: Control
Participants do not exercise and remain sitting for 45 minutes
Other: Control
45 minutes resting sitting

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Ambulatory Blood Pressure Monitoring
Time Frame: 24 hours
Ambulatory blood pressure monitoring following experimental protocols
24 hours

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Office Blood Pressure
Time Frame: 1 hour
Post exercise blood pressure during 60 minutes after experimental sessions
1 hour

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Hospital de Clinicas de Porto Alegre

Collaborators

Federal University of Rio Grande do Sul

Investigators

  • Principal Investigator: Sandra C Fuchs, PhD, Hospital de Clínicas de Porto Alegre

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

March 1, 2014

Primary Completion (Actual)

December 1, 2015

Study Completion (Actual)

December 1, 2015

Study Registration Dates

First Submitted

April 9, 2015

First Submitted That Met QC Criteria

April 13, 2015

First Posted (Estimate)

April 14, 2015

Study Record Updates

Last Update Posted (Actual)

May 31, 2018

Last Update Submitted That Met QC Criteria

May 29, 2018

Last Verified

August 1, 2015

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 130484

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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