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Knee replacement patients get a push to move more

NCT ID NCT04107649

Symptom relief Sponsor: Brigham and Women's Hospital Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tests whether phone coaching and financial rewards can help people become more active after total knee replacement. 600 adults aged 40-85 will be split into three groups: usual care, activity tracker only, or activity tracker plus coaching and rewards. The goal is to see if these strategies increase moderate-to-vigorous physical activity to at least 150 minutes per week.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Telephonic coaching and financial incentives
What this could lead to
If successful, this approach could help people recovering from knee replacement become more active, improving their long-term health and quality of life.
What could go wrong
This is a behavioral intervention, not a drug or surgery. Results depend on participants' motivation and may not apply to everyone. The trial is still ongoing, so outcomes are not yet known.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 600 people

The number the study aims to enrol. It can still change while the study runs.

Started

Apr 2023

Expected to finish

Jun 2028

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

40 to 85 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age 40-85 years * English-speaking * Scheduled to undergo primary, unilateral total knee replacement (TKR) at one of the 4 recruitment centers * OA is principal underlying indication for TKR * During an accelerometer run-in period lasting one week at baseline (prior to surgery), subjects must show that they can comply with waist-worn physical activity tracker protocols by wearing the activity tracker for ≥4/7 days of the week for ≥10 hours/day * Regular access to a personal computer, laptop, tablet, or smartphone for wrist-worn activity tracker syncing * Satisfying average baseline steps/day criteria (calculated from waist-worn activity tracker data from the run-in period) Exclusion Criteria: * Non-English speaking * Residence in nursing home * Diagnosis of dementia, epilepsy, Parkinson's Disease, or diabetes with peripheral neuropathy * Inflammatory arthritis (rheumatoid arthritis, ankylosing spondylitis, psoriatic arthritis, reactive arthritis, systemic lupus erythematosus, polymyalgia) * Psychological issues that preclude participation * Inpatient or other musculoskeletal surgery scheduled within six months following index primary TKR * Uses a wheelchair to ambulate (subjects who use a cane will be eligible) * Surgeon-documented other reason for study exclusion * Subject does not have regular access to a device capable of receiving email or text messages

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Conditions

The condition(s) this trial relates to.

Motor Activity osteoarthritis, knee

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Knee osteoarthritis Total knee replacement

Contacts and locations

Locations

  • Brigham and Women's Hospital

    Boston, Massachusetts, 02115, United States

  • Northwestern Memorial Hospital

    Chicago, Illinois, 60611, United States

  • University at Buffalo

    Buffalo, New York, 14215, United States

  • University of Kansas Medical Center

    Kansas City, Kansas, 66160, United States

  • University of Nebraska Medical Center

    Omaha, Nebraska, 68198, United States

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