Post-Exercise Hypotension After Water Exercise

NCT03112070 | Completed

• 1 other identifier: Water Exercise
• Study Type: interventional
• Target: 24
• Locations: 1 country
• Sites: 1

Brief Summary

Hypertension is the most prevalent cardiovascular disease risk factor among individuals 60 years of age and older. Hypertension can be prevented and modified with lifestyle interventions that include regular exercise. Water exercise is widely recommended for older adults for a variety of health benefits, but few studies have assessed the immediate ambulatory blood pressure (BP) response to water exercise, a response termed postexercise hypotension (PEH). We will assess PEH after a session of water aerobics in physically active, older women with hypertension. Twenty-four women will be randomly assign to participate in a 45 min session of moderate intensity, water aerobics (WATER) and a 45 min land control session (CONTROL). All experimental sessions will start at 9 am sharply with 7 days between them. Subjects will left the experiments wearing an ambulatory BP monitor for the next 21 hr.

Conditions

Postexercise Hypotension

Outcome Measures

Primary Outcomes (1)

• Blood pressure measurements

  BP measurements will take and monitored using a 24-hour ambulatory blood pressure monitoring (ABPM) protocol according to standard procedures. BP monitoring devices (Spacelab, Redmond, WA, USA) will be used to obtain BP over 21 hours that consiste of four measurements per hour over awake period (10 am to 10 pm) and two measurements per hour over sleep period (10 pm to 6 am). For data analysis we will calculate hourly averages for awake and sleep (during the same periods as mentioned above), and over 21 hours. SBP and DBP data are presente in two different manners: readings per hour during the day and the night periods, and the BP response determined as the difference (delta) between each hourly BP measurement from baseline after WATER compared to CONTROL.

  24-hour ambulatory blood pressure monitoring after water exercise

Study Arms (2)

Water aerobic exercise session (WATER)

EXPERIMENTAL

A continuous session of dynamic water aerobic exercise which consist of a dynamic warm-up period (5 minutes), an active exercise period (35 minutes), and a cooldown period (5 minutes) to total 45 minutes. Heart rate (HR) will be continuously measured with heart monitors (Polar) to confirm the intensity of the WATER session. The WATER intensity will be calculated according to the formula proposed by Kruel for exercise in an aquatic environment18 as follows: HR for exercise = % x (HRmax - ΔHR); % is the intensity of exercise; HRmax is the maximum HR (estimated by 220 - age); ΔHR represents the difference between resting HR on land and resting HR in the water environment. Exercise intensities: 55-60% HRmax during warm-up; 70-75% HRmax during active exercise; and 55-60% HRmax during cooldown.

Other: Water aerobic exercise session (WATER)

Control session (CONTROL)

NO INTERVENTION

A 45-min session with no exercise. During this session, participants will remain seated or standing as desired. They will read, talk, and drink water, but do nothing else.

Interventions

Water aerobic exercise session (WATER) OTHER

A continuous session of dynamic water aerobic exercise which consist of a dynamic warm-up period (5 minutes), an active exercise period (35 minutes), and a cooldown period (5 minutes) to total 45 minutes. Heart rate (HR) will be continuously measured with heart monitors (Polar) to confirm the intensity of the WATER session. The WATER intensity will be calculated according to the formula proposed by Kruel for exercise in an aquatic environment18 as follows: HR for exercise = % x (HRmax - ΔHR); % is the intensity of exercise; HRmax is the maximum HR (estimated by 220 - age); ΔHR represents the difference between resting HR on land and resting HR in the water environment. Exercise intensities: 55-60% HRmax during warm-up; 70-75% HRmax during active exercise; and 55-60% HRmax during cooldown.

Water aerobic exercise session (WATER)

Eligibility Criteria

• Age: 65 Years - 80 Years
• Healthy Volunteers: No
• Age Groups: Older Adult (65+)

You may qualify if:

• resting SBP ≤ 160 mmHg and DBP ≤ 100 mmHg documented by a physician;
• to 80 years of age;
• physically active on land but not water (exercising 3 or more days per week as determined by the International Physical Activity Questionnaire long-form).

You may not qualify if:

• any febrile condition and/or infectious diseases;
• no other chronic diseases or conditions other than hypertension;
• body mass index (BMI) \> 35 kg/m2;
• active smoker;
• physical or mental limitations that prevent exercising.

Sponsors & Collaborators

• Instituto de Cardiologia do Rio Grande do Sul: lead

Study Sites (1)

Alexandre Lehnen

Porto Alegre, Rio Grande do Sul, 90620-001, Brazil

Location

MeSH Terms

Conditions

Post-Exercise Hypotension

Condition Hierarchy (Ancestors)

Orthostatic Intolerance; Primary Dysautonomias; Autonomic Nervous System Diseases; Nervous System Diseases; Hypotension; Vascular Diseases; Cardiovascular Diseases

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: OUTCOMES ASSESSOR
• Purpose: TREATMENT
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: April 3, 2017
• First Posted: April 13, 2017
• Study Start: April 4, 2016
• Primary Completion: April 30, 2017
• Study Completion: April 30, 2017
• Last Updated: July 24, 2017

Record last verified: 2017-07

Data Sharing

• IPD Sharing: Will not share

Locations

BR (1)