Isometric Exercise for Hypertension

NCT ID: NCT06515054

Last Updated: 2025-12-16

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

50 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-07-20

Study Completion Date

2025-11-30

Brief Summary

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Background: Isometric resistance exercises (IREs) have great potential to improve blood pressure (BP) control.

Methods: This is a pilot randomized controlled trial that will involve 50 patients with hypertension (HT) who do not meet the current physical activity guidelines defined by the World Health Organization. Participants will be randomly assigned in a 1:1 ratio using stratified and blocked randomization to either the IRE (wall squat) group or stretching exercise (active control) group. A well-structured, widely accepted, and validated 24-week wall squat program (2 minutes per exercise, 2 minutes of rest between sets, and 3 sessions per week) will be implemented, as it has been commonly used in previous research. All patients will be followed up for 24 weeks. Control group will receive exact same treatment except that IRE is replaced by frequency-matched and time-matched stretching exercise. The primary outcome measure will be rate of recruitment. Secondary outcomes will include BP parameters from 24-hour ambulatory BP monitoring

Detailed Description

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Conditions

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Hypertension

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

DOUBLE

Investigators Outcome Assessors

Study Groups

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isometric exercise

wall squat exercise. Each exercise session will contain 4 sets of 2-minute wall squat isometric holds with 2 minutes of rest between each set (approximately 14 minutes per session in total), and a total of 3 sessions will be arranged every week (with ideally 48 h between exercises)

Group Type EXPERIMENTAL

wall squat

Intervention Type BEHAVIORAL

self-learnt wall squat exercise to be conducted for totally 24 weeks

passive stretching

A frequency-matched (3x/week) and time-matched (\~14 minutes each session) passive static stretching exercise will be used

Group Type ACTIVE_COMPARATOR

passive stretching

Intervention Type BEHAVIORAL

time-matched passive stretching exercise to be conducted for totally 24 weeks

Interventions

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wall squat

self-learnt wall squat exercise to be conducted for totally 24 weeks

Intervention Type BEHAVIORAL

passive stretching

time-matched passive stretching exercise to be conducted for totally 24 weeks

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* a suboptimal daytime SBP of \>135-160 mmHg on a 24-h ABPM
* reported no regular physical activity or less than that recommended for adults by the World Health Organization (e.g. \<150 minutes of moderate-intensity aerobic exercise per week);
* on stable doses of anti-HT medication(s) for ≥4 weeks if the patient is receiving drug treatments
* agree for no drug changes during the intervention period (24 weeks);

Exclusion Criteria

* cannot provide informed consent
* unwillingness to repeat ABPM
* relative contraindications to ABPM (i.e. diagnosed atrial fibrillation, nighttime workers, occupational drivers, or patients with bleeding tendencies)
* severe osteoarthritis pending knee replacement surgery
* known secondary HT
* use of ≥3 anti-HT medications at maximum doses or ≥4 anti-HT medications
* SBP or DBP are \>160 mmHg or \>100 mmHg, respectively, on ABPM
* pregnancy/breastfeeding
* active malignancy
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Chinese University of Hong Kong

OTHER

Sponsor Role lead

Responsible Party

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Lee Kam Pui

clinical associate professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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School of public health and primary care

Hong Kong, , Hong Kong

Site Status

Countries

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Hong Kong

Other Identifiers

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IRE001

Identifier Type: -

Identifier Source: org_study_id