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Effects of IMT on Cardiopulmonary Endurance and Functional Mobility in KOA

Inspiratory Muscle Training as an Adjunct to Standard Care: Effects on Cardiopulmonary Endurance and Functional Mobility in Knee Osteoarthritis

Status
Not yet recruiting
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07738627
Acronym
IMT
Enrollment
65
Registered
2026-07-31
Start date
2026-08-01
Completion date
2027-12-11
Last updated
2026-08-27

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Knee Osteoarthritis

Keywords

Knee Osteoarthritis, Inspiratory Muscle Training, Cardiopulmonary Endurance, Aerobic capacity, Respiratory Muscle Strength, Functional Mobility, 6-Minute Walk Test, WOMAC, TUG Test

Brief summary

The purpose of the study is to investigate whether adding Inspiratory Muscle Training (IMT) to the usual treatment of patients with knee osteoarthritis improves their cardiopulmonary endurance and functional mobility more than standard care alone.

Detailed description

Knee osteoarthritis (KOA) is a common degenerative joint disorder associated with pain, stiffness, reduced mobility, and decreased physical activity. Reduced activity levels often result in impaired cardiopulmonary fitness and decreased aerobic capacity. Previous evidence suggests that individuals with severe KOA exhibit diminished inspiratory muscle strength and lower exercise tolerance. Inspiratory Muscle Training (IMT) strengthens respiratory muscles and improves ventilatory efficiency. IMT is a technique in which a person breathes in against resistance using a special device such as POWERbreathe to make the breathing muscles stronger. Since conventional rehabilitation primarily focuses on pain reduction and lower limb strengthening, incorporating IMT may provide additional benefits without imposing extra stress on the knee joint. This study aims to compare conventional KOA treatment combined with IMT against conventional treatment combined with sham IMT over a six-week intervention period.

Interventions

The POWERBREATH devices utilize calibrated resistance valves to force your breathing muscles to work harder, which naturally builds their power, stamina, and efficiency. IMT through POWERbreathe * 30 quick breaths two times a day at an adjustable resistance (equivalent to∼50% of (baseline) MIP). * Increased up to 35 breaths as per patient's tolerance.

DEVICESHAM IMT

* 60 slow breaths once daily at a load setting of 0 (corresponding to∼15% (baseline) MIP). * Training load adjustment was prevented using sticky tape applied to the device's load adjuster.

Sponsors

Riphah International University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
40 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

* Age 40-65 years * Male and Female participants * Bilateral Knee Osteoarthritis * Diagnosed according to American College of Rheumatology criteria * Kellgren and Lawrence Grade II-III * Able to walk independently * Willing to provide informed consent

Exclusion criteria

* Participation in structured physical activity programs * Intra-articular corticosteroid injection within last 3 months * Hyaluronic acid injection within last 6 months * Lower limb trauma or surgery history * Planned surgery during study period * Severe cardiovascular disease * Severe pulmonary disease * Neurological disorders * Psychological disorders

Design outcomes

Primary

MeasureTime frameDescription
Six-Minute Walk Test Assessment of cardiopulmonary endurance and aerobic capacity. Time Frame: Baseline, Week 3, Week 6 Six-Minute Walk Test (6MWT) Assessment of cardiopulmonary endurance and aerobic capacity. Time Frame: Baseline, Week 3, WeeBaseline, Week 3, Week 6Assessment of cardiopulmonary endurance
. Timed Up and Go Test (TUG)Time Frame: Baseline, Week 3, Week 6Assessment of funcional mobility.

Secondary

MeasureTime frameDescription
Visual Analogue Scale (VAS): Baseline, Week 3, Week 6Pain intensity was measured using the Visual Analog Scale (VAS), with scores ranging from 0 (no pain) to 10 (worst imaginable pain). The minimum possible score is 0, the maximum possible score is 10, and higher scores represent greater pain intensity (worse outcome).
Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC)Baseline, Week 3, Week 6Assessment of pain, stiffness, physical function, and quality of life. Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Total Score: The WOMAC is a self-reported questionnaire assessing pain, stiffness, and physical function in individuals with osteoarthritis. The total score ranges from 0 to 96, where 0 indicates no symptoms or functional impairment and 96 indicates the most severe symptoms and functional impairment. Higher scores indicate a worse outcome.

Countries

Pakistan

Contacts

CONTACTDr. Suman Sheraz, Phd
suman.sheraz@riphah.edu.pk03335646361
CONTACTDr. Imran Amjad, Phd
imran.amjad@riphah.edu.pk03324390125
PRINCIPAL_INVESTIGATORDr. Suman Sheraz, PhD

Riphah International University

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 28, 2026