Effects of Inspiratory Muscle Training on Stroke Rehabilitation Outcomes

NCT ID: NCT06640101

Last Updated: 2025-02-24

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

RECRUITING

Clinical Phase

NA

Total Enrollment

84 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-02-21

Study Completion Date

2026-06-15

Brief Summary

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This study is designed to explore the effects of a 4-week protocol of inspiratory muscle training (IMT) at 50% maximum inspiratory pressure (MIP) on respiratory function, diaphragm thickness, balance control, exercise capacity, and quality of life in people after stroke. To ascertain the effect of IMT on the relationship between diaphragm muscle contraction and activation of other trunk muscles, this study also explores whether any effect of the 4-week IMT protocol on balance control is associated with changes in the anticipatory posture adjustments (APAs) time - the onset time of postural muscles during a required task (e.g., the rapid shoulder flexion test).

Detailed Description

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Conditions

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Stroke

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

DOUBLE

Participants Outcome Assessors

Study Groups

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Group A (sham IMT- stable group)

conventional treatment + sham IMT

Group Type SHAM_COMPARATOR

sham IMT

Intervention Type OTHER

with 10% maximum inspiratory pressure (MIP) as the training intensity, IMT will be conducted on a stable surface

Conventional treatment

Intervention Type OTHER

Participants in all groups will receive a standardised conventional rehabilitation protocol. It includes limb range of motion, muscle tone reduction, strengthening and endurance of limb muscles, transfer skills, task-directed movements, general gait training, and activities of daily living training.

Group B (IMT-stable group)

conventional treatment + target IMT while sitting on a stable surface

Group Type EXPERIMENTAL

IMT-stable group (sitting on a stable surface)

Intervention Type OTHER

50% MIP as the training intensity, IMT will be conducted while sitting on a stable surface

Conventional treatment

Intervention Type OTHER

Participants in all groups will receive a standardised conventional rehabilitation protocol. It includes limb range of motion, muscle tone reduction, strengthening and endurance of limb muscles, transfer skills, task-directed movements, general gait training, and activities of daily living training.

Group C (IMT-unstable group)

conventional treatment + target IMT while sitting on an unstable surface

Group Type EXPERIMENTAL

IMT-unstable group (sitting on an unstable surface)

Intervention Type OTHER

50% MIP as the training intensity, IMT will be conducted while sitting on an unstable surface

Conventional treatment

Intervention Type OTHER

Participants in all groups will receive a standardised conventional rehabilitation protocol. It includes limb range of motion, muscle tone reduction, strengthening and endurance of limb muscles, transfer skills, task-directed movements, general gait training, and activities of daily living training.

Interventions

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sham IMT

with 10% maximum inspiratory pressure (MIP) as the training intensity, IMT will be conducted on a stable surface

Intervention Type OTHER

IMT-stable group (sitting on a stable surface)

50% MIP as the training intensity, IMT will be conducted while sitting on a stable surface

Intervention Type OTHER

IMT-unstable group (sitting on an unstable surface)

50% MIP as the training intensity, IMT will be conducted while sitting on an unstable surface

Intervention Type OTHER

Conventional treatment

Participants in all groups will receive a standardised conventional rehabilitation protocol. It includes limb range of motion, muscle tone reduction, strengthening and endurance of limb muscles, transfer skills, task-directed movements, general gait training, and activities of daily living training.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Age ≥ 40 years and \< 80 years;
* breathing spontaneously;
* clinically diagnosed with ischemic and/or haemorrhagic stroke;
* duration of stroke from onset falls within 1 month to 12 months after diagnosis;
* no thoracic or abdominal surgery within the last 6 months;
* able to understand and follow verbal instructions;
* no facial palsy, or mild facial palsy without limitation of labial occlusion;
* able to maintain a resting sitting posture without feet support for at least 30 seconds;
* no cognitive impairment (Montreal Cognitive Assessment (MoCA) score ≥ 26);
* able to independently walk at least 10 meters with or without an assistive device.

Exclusion Criteria

* acute myocardial infarction or acute heart failure;
* acute pain in any part of the body;
* with respiratory illness or positive clinical signs of impaired respiratory function (such as shortness of breath, hypoxemia, chronic cough and sputum retention);
* with chronic cardiovascular dysfunction;
* Trunk Impairment Scale (TIS) score ≥ 20.
* patient with a nasal feeding tube, tracheal tube and/or any condition that prevents the measurement or the implementation of the study procedure.
Minimum Eligible Age

40 Years

Maximum Eligible Age

80 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Hong Kong Metropolitan University

OTHER

Sponsor Role lead

Responsible Party

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LIU FANG

Principal Investigator

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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Shenzhen Second People's Hospital

Shenzhen, None Selected, China

Site Status RECRUITING

Countries

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China

Central Contacts

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Fang LIU

Role: CONTACT

+86 13603049475

William Wai-nam Tsang

Role: CONTACT

085239708703

Facility Contacts

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Fang LIU

Role: primary

+8613603049475

Provided Documents

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Document Type: Study Protocol and Statistical Analysis Plan

View Document

Document Type: Informed Consent Form

View Document

Other Identifiers

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No.:HE-OT2023/13

Identifier Type: -

Identifier Source: org_study_id

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