Post-Exercise Hypotension After Water Exercise

NCT ID: NCT03112070

Last Updated: 2017-07-24

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 24 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2016-04-04
• Study Completion Date: 2017-04-30

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

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: TREATMENT
• Blinding Strategy: SINGLE

Study Groups

Water aerobic exercise session (WATER)

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.

Group Type: EXPERIMENTAL

Water aerobic exercise session (WATER)

Intervention Type: 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.

Control session (CONTROL)

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.

Group Type: NO_INTERVENTION

No interventions assigned to this group

Interventions

Water aerobic exercise session (WATER)

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.

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• resting SBP ≤ 160 mmHg and DBP ≤ 100 mmHg documented by a physician;
• 65 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).

Exclusion Criteria

• 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.

• Minimum Eligible Age: 65 Years
• Maximum Eligible Age: 80 Years
• Eligible Sex: FEMALE
• Accepts Healthy Volunteers: No

Sponsors

Instituto de Cardiologia do Rio Grande do Sul

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

Alexandre Lehnen

Porto Alegre, Rio Grande do Sul, Brazil

Countries

Brazil

Other Identifiers

Water Exercise

Identifier Type: -

Identifier Source: org_study_id