NCT07649291

Brief Summary

Knee osteoarthritis (KOA) is one of the most common causes of chronic pain, mobility problems, and disability among United States Veterans. Many Veterans with KOA also experience depressive symptoms, which can worsen pain, reduce motivation to exercise, and make recovery more difficult. This study will test whether a structured hybrid aerobic exercise program that combines supervised and home-based walking with the medication duloxetine can improve physical function, reduce pain, lessen depressive symptoms, and improve overall health-related outcomes in Veterans with KOA. The goal of this research is to develop a practical and scalable treatment strategy that could improve rehabilitation and quality of life for Veterans with chronic knee pain and depressive symptoms and potentially be adapted for other chronic musculoskeletal conditions treated within the VA healthcare system.

Trial Health

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Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
102

participants targeted

Target at P50-P75 for phase_2 knee-osteoarthritis

Timeline
67mo left

Started Mar 2027

Longer than P75 for phase_2 knee-osteoarthritis

Geographic Reach
1 country

1 active site

Status
not yet recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

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Study Timeline

Key milestones and dates

First Submitted

Initial submission to the registry

June 10, 2026

Completed
6 days until next milestone

First Posted

Study publicly available on registry

June 16, 2026

Completed
9 months until next milestone

Study Start

First participant enrolled

March 1, 2027

Expected
4.5 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

September 1, 2031

1 year until next milestone

Study Completion

Last participant's last visit for all outcomes

September 1, 2032

Last Updated

June 16, 2026

Status Verified

June 1, 2026

Enrollment Period

4.5 years

First QC Date

June 10, 2026

Last Update Submit

June 10, 2026

Conditions

Keywords

ExercisePainDepressive symptomsPhysical FunctionDuloxetine

Outcome Measures

Primary Outcomes (1)

  • 20-Meter Walk Test

    20m WT (average time to walk 20 meters at usual pace across two trials) from baseline to 12 weeks, and between-group comparison (aerobic exercise + duloxetine vs. PT referral + duloxetine)

    baseline, 12-week follow-up

Secondary Outcomes (2)

  • Pain severity

    baseline, 12-week follow-up

  • Depressive symptoms

    baseline, 12-week follow-up

Study Arms (3)

Exercise+Duloxetine

ACTIVE COMPARATOR

hybrid supervised aerobic exercise plus duloxetine

Behavioral: ExerciseDrug: Duloxetine

Duloxetine+PT referral

ACTIVE COMPARATOR

duloxetine plus physical therapy (PT) referral

Drug: DuloxetineBehavioral: PT referral

Exercise+Placebo

ACTIVE COMPARATOR

hybrid supervised aerobic exercise plus placebo

Behavioral: ExerciseDrug: Placebo

Interventions

ExerciseBEHAVIORAL

Participants will be asked to participate in a 1x/week center-based exercise session and 2x/week walking session conducted on their own for \~12 weeks.

Exercise+DuloxetineExercise+Placebo

Participants will receive study medication - duloxetine - and take medication as directed.

Duloxetine+PT referralExercise+Duloxetine

Participants will receive study medication - matched placebo- and take as directed.

Exercise+Placebo
PT referralBEHAVIORAL

Participants will be referred to physical therapy with treatment as part of usual care and individualized to the Veteran's needs.

Duloxetine+PT referral

Eligibility Criteria

Age40 Years+
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • Veterans aged ≥40 years
  • English-speaking
  • symptomatic KOA based on American College of Rheumatology (ACR) criteria
  • Patient Health Questionnaire-9 (PHQ-9) scores indicating mild to severe depressive symptoms
  • no planned knee surgery within the next 6 months
  • ability to participate in supervised aerobic exercise

You may not qualify if:

  • current use of antidepressants, opioids, benzodiazepines, or antipsychotics
  • engaging in structured aerobic or resistance exercise ≥3 times per week
  • cognitive impairment defined as a Mini-Mental State Examination (MMSE) score \<20
  • diagnosis of bipolar disorder, psychosis, recent substance use disorder, or suicidal ideation per the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5)
  • medical conditions contraindicating exercise (e.g., recent myocardial infarction, unstable angina, peripheral arterial disease with ulcers, -uncontrolled hypertension \>190/110, or New York Heart Association class ≥3 cardiac or pulmonary disease)
  • pregnant or lactating individuals
  • active cancer that is currently undergoing treatment (receiving chemotherapy and/or radiation therapy
  • other conditions deemed by study team to endanger the health of the participant

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Baltimore VA Medical Center VA Maryland Health Care System, Baltimore, MD

Baltimore, Maryland, 21201, United States

Location

MeSH Terms

Conditions

Osteoarthritis, KneePainDepressionMotor Activity

Interventions

ExerciseDuloxetine Hydrochloride

Condition Hierarchy (Ancestors)

OsteoarthritisArthritisJoint DiseasesMusculoskeletal DiseasesRheumatic DiseasesNeurologic ManifestationsSigns and SymptomsPathological Conditions, Signs and SymptomsBehavioral SymptomsBehavior

Intervention Hierarchy (Ancestors)

Motor ActivityMovementMusculoskeletal Physiological PhenomenaMusculoskeletal and Neural Physiological PhenomenaThiophenesSulfur CompoundsOrganic ChemicalsHeterocyclic Compounds, 1-RingHeterocyclic Compounds

Study Officials

  • Alan M Rathbun, PhD MPH

    Baltimore VA Medical Center VA Maryland Health Care System, Baltimore, MD

    PRINCIPAL INVESTIGATOR
  • Alice S. Ryan, PhD

    Baltimore VA Medical Center VA Maryland Health Care System, Baltimore, MD

    PRINCIPAL INVESTIGATOR

Central Study Contacts

Alice S Ryan, PhD

CONTACT

Kristina Marcus, MS

CONTACT

Study Design

Study Type
interventional
Phase
phase 2
Allocation
RANDOMIZED
Masking
DOUBLE
Who Masked
PARTICIPANT, OUTCOMES ASSESSOR
Masking Details
Participants randomized to receive the exercise program will be blinded to duloxetine or placebo. Outcome assessors will be blinded to treatment allocation/group assignment.
Purpose
TREATMENT
Intervention Model
PARALLEL
Model Details: * (1) hybrid supervised aerobic exercise plus duloxetine * (2) duloxetine plus physical therapy (PT) referral representing a usual care comparator condition, or * (3) hybrid supervised aerobic exercise plus placebo
Sponsor Type
FED
Responsible Party
SPONSOR

Study Record Dates

First Submitted

June 10, 2026

First Posted

June 16, 2026

Study Start (Estimated)

March 1, 2027

Primary Completion (Estimated)

September 1, 2031

Study Completion (Estimated)

September 1, 2032

Last Updated

June 16, 2026

Record last verified: 2026-06

Data Sharing

IPD Sharing
Will not share

Locations