Companies Yellow_Right_Arrow
Companies Yellow_Right_Arrow
Products Yellow_Right_Arrow
menu
About Us
Healthcare Professionals
Patient Care
close-button-yellow
  • home-yellow-iconhome-white-icon
  • Blogs

Blogs

Making a positive impact with meaningful innovations for our patients, healthcare providers, and communities.

7 Best Knee and Hip Motion Restoration Devices

Knee and hip motion restoration devices can help people work on stiffness, range of motion, and gentle movement at home or during rehabilitation. The options are not interchangeable. Some provide continuous passive motion, while others support active pedaling or controlled stretching. As orthopedic surgeon Howard Luks, MD, puts it, “Motion is lotion.” The phrase is memorable, but it is not a treatment plan. Your diagnosis, surgical instructions, pain level, and mobility goals should guide device selection.

Small gains matter. A few degrees of movement may make getting into a car or climbing stairs feel less difficult. Still, a machine cannot guarantee recovery, and more movement is not always better. A device that feels helpful to one person may aggravate another person’s symptoms. Ask your physical therapist or surgeon about safe motion limits, session length, and warning signs before use. Check that controls are easy to reach, straps fit securely, and the frame suits your space. These details are less exciting than advertised features, but they can shape everyday use.

This guide compares seven Knee and hip motion restoration devices, including what each is designed to do and where it may fit into rehabilitation. It also considers comfort, adjustability, and practical limitations. No single pick suits everyone. That is worth remembering. A device can support consistent practice, but it cannot replace an individualized recovery plan or professional assessment.

7 Best Knee and Hip Motion Restoration Devices
Table of Contents [Hide]
1 How Knee and Hip Motion-Restoration Devices Support Rehabilitation
2 Seven Device Types: CPM, Active-Assist ROM, Flexion, Pedaling, NMES, Braces, Robotics
3 WHO: Knee Osteoarthritis Affected 365 Million People in 2019
4 Clinical Evidence, Contraindications, and FDA-Clearance Basics
5 Choosing a Device by Joint, Recovery Stage, Fit, and Clinician Guidance

How Knee and Hip Motion-Restoration Devices Support Rehabilitation

Motion-restoration devices can help patients practice movement when pain, swelling, or weakness makes ordinary exercise difficult. A continuous passive motion (CPM) unit slowly bends and straightens the knee while the user lies supported. Other systems assist guided knee or hip movement, helping people rehearse a comfortable range without bearing full weight. The goal is measured motion, not forcing a joint past pain.

Evidence calls for realistic expectations. A 2014 Cochrane review of CPM after knee replacement found an average improvement of about 2 degrees in active knee flexion, a small change that may not matter in daily life. The American Physical Therapy Association’s 2020 guideline advises against routine CPM use after uncomplicated total knee replacement. Devices may still have a role when a clinician identifies a specific need, but they do not replace individualized exercise, strength work, or regular reassessment. A smooth machine cycle is not proof of recovery.

Fit and routine matter. A device should support the joint without pinching skin, pulling at an incision, or increasing pain; users should follow their care team’s settings and stop if symptoms worsen. The World Health Organization’s 2019 estimates report that 528 million people lived with osteoarthritis worldwide, including 365 million with knee osteoarthritis. That burden makes accessible rehabilitation important, though one device cannot suit every body or recovery. Progress can feel uneven. A patient may gain motion one day and lose some after swelling returns. The plan needs room for that reality.

7 Best Knee and Hip Motion Restoration Devices - How Knee and Hip Motion-Restoration Devices Support Rehabilitation

A practical comparison of device types used to support movement, strength, and functional mobility during knee or hip rehabilitation. Suitability depends on the procedure, diagnosis, healing stage, and clinician guidance.

Device type How it supports movement Common rehabilitation use Key considerations
Continuous passive motion (CPM) machine Moves the knee through a preset range while the user remains relaxed. May be prescribed after selected knee procedures when a clinician wants supported, repetitive motion. It does not replace active exercise or walking. Routine use after uncomplicated knee replacement is not generally required; follow the treating team's protocol and prescribed range.
Motor-assisted cycle ergometer Provides assisted or low-resistance pedaling to help practice repeated knee and hip flexion and extension. Useful when independent pedaling is initially difficult or when a controlled, low-load movement session is appropriate. Seat position, range, assistance, and resistance should be adjusted to comfort and clinical instructions. Stop if movement causes sharp or increasing pain.
Recumbent stationary bike Allows repetitive cycling with the back supported and body weight off the feet. Often used to build comfortable range of motion and endurance as recovery permits, including in many knee and hip exercise programs. Begin with a seat position that allows a comfortable pedal stroke and little or no resistance. The ability to complete a full revolution depends on available joint motion.
Seated pedal exerciser Provides low-impact, short-range pedaling from a chair or wheelchair. Can offer a compact option for gentle movement practice when mounting a full-size bike is inconvenient. Use a stable chair and secure the unit to prevent it from sliding. It may not provide the same positioning or resistance control as a clinical ergometer.
Adjustable-resistance stationary bike Combines repeated joint movement with adjustable resistance for progressive conditioning. May support endurance and strengthening later in rehabilitation, once the user can pedal comfortably and has clearance to increase load. Resistance should be progressed gradually. A high seat and low initial resistance can reduce the demand on the knee; follow clinician advice for hip precautions.
Body-weight-support treadmill Uses a harness system to reduce some of the load placed through the legs during supervised walking practice. Can help selected patients practice gait, step timing, and walking endurance when full weight-bearing is difficult. Typically requires trained supervision and suitable equipment. The amount of support and walking speed must be set for the individual and any weight-bearing restrictions.
Robotic gait-training system Guides or assists repeated stepping while providing structured support and feedback. Used in some specialist rehabilitation settings to practice walking when neurological or mobility limitations affect gait. Availability and treatment protocols vary. It is not necessary for every knee or hip rehabilitation program and does not replace individualized assessment or functional practice.

Safety note: Device choice, motion range, weight-bearing, and exercise intensity should be guided by a qualified healthcare professional. Follow post-operative precautions and stop to seek advice if you experience severe pain, unusual swelling, or other concerning symptoms.

Seven Device Types: CPM, Active-Assist ROM, Flexion, Pedaling, NMES, Braces, Robotics

Knee and hip motion devices solve different problems.

The World Health Organization’s 2023 osteoarthritis fact sheet reports that 528 million people lived with osteoarthritis in 2019; 365 million had knee osteoarthritis.

That scale makes practical rehabilitation important, but a device should match the person’s movement limits, surgery, and clinician’s plan. Continuous passive motion (CPM) gently cycles a joint while the user relaxes. An AHRQ evidence review found CPM improved knee flexion by about 2 degrees at six weeks after knee replacement, a small change that may not matter to every patient. Evidence is uneven.

Active-assist range-of-motion devices let users contribute effort while receiving mechanical support.

Flexion devices hold a bent position to gradually increase range; careful adjustment matters, since excessive pressure can irritate a healing joint.

Pedaling units provide repeated, low-impact movement, often in a chair beside the bed.

NMES uses electrical pulses to prompt muscle contractions when voluntary activation is difficult.

Braces stabilize or limit motion, but poor fit can cause rubbing behind the knee.

Robotic systems guide repeated movements and can track performance, though access and setup vary.

Small details matter: a strap slipping, a foot that cannot reach the pedal, or a session that feels tiring. Rehabilitation is not perfectly linear. A therapist can help decide whether the device is improving useful daily movement, rather than simply increasing a number on a screen.

WHO: Knee Osteoarthritis Affected 365 Million People in 2019

In 2019, an estimated 365 million people worldwide were affected by knee osteoarthritis, according to figures cited by the World Health Organization. That number represents people dealing with ordinary tasks: standing from a low chair, walking across a grocery store, or climbing a few steps. Knee osteoarthritis can cause pain and stiffness, which may make movement feel less appealing. Yet gentle, regular activity is often part of managing symptoms.

Knee and hip motion devices can support controlled movement at home. Options include pedal exercisers, seated cycles, and clinician-prescribed continuous passive motion machines. They differ in how much effort they require and how they guide a joint. A device may help someone move within a comfortable range, but it does not repair worn cartilage or replace medical care. Results vary. Even a smooth session may be followed by soreness, so progress can take patience.

Tips: Start with a low setting and a short session, such as five minutes. Keep movements comfortable, not forced. Note pain or swelling later that day. Ask a physiotherapist or other qualified clinician which device suits your joint, health, and recovery goals. Stop and seek advice if symptoms worsen or new pain appears.

Clinical Evidence, Contraindications, and FDA-Clearance Basics

When comparing seven knee and hip motion restoration devices, match the evidence to the condition and recovery stage. Studies may measure range of motion, pain, walking ability, or complications. Those outcomes are not interchangeable. Evidence from people recovering after surgery may not apply to someone with chronic arthritis. Evidence varies. Look for peer-reviewed studies, clear methods, and follow-up long enough to show whether benefits lasted. A device’s polished screen is not proof of better recovery.

Contraindications depend on the device and the person. Recent surgery, unstable fractures, severe swelling, or certain implanted electrical devices may require extra screening. Ask a clinician to review your medical history and the device instructions. Stop use and seek advice if pain, numbness, or swelling worsens. FDA clearance is specific to a device and its stated use. Clearance does not prove that a device is superior, guarantee results, or mean every version has the same status. Check the exact model and indication in FDA records. Labels matter.

Tips: Before a trial, note your baseline pain and how far your knee or hip bends. Bring those notes, your medication list, and questions to the appointment. Small daily changes can be hard to judge from memory.

Knee and Hip Motion Restoration: Typical Adult Range-of-Motion Benchmarks

Reference joint-motion values in degrees—not device performance or treatment targets.

These commonly cited goniometric reference values vary with age, measurement method, and individual anatomy. They are not a diagnosis or a prescribed goal. FDA clearance applies to a specific device and its cleared intended use; it does not establish that every device in a category restores motion.

Reference: Norkin & White, Measurement of Joint Motion: A Guide to Goniometry.

Choosing a Device by Joint, Recovery Stage, Fit, and Clinician Guidance

7 Best Knee and Hip Motion Restoration Devices

Choosing a device starts with the joint and the recovery plan. Knee motion devices may support gentle bending and straightening, while hip equipment must respect any movement restrictions after surgery. The same device is not right for every patient. Early recovery may call for clinician-guided passive movement; later, active exercises may be more suitable. Follow the prescribed range and duration rather than aiming for the biggest movement. More is not always better.

Fit matters. Check that straps sit securely without pinching, and that the moving arm aligns with the joint. A sliding heel, pressure behind the knee, or a hip support that shifts can make a session uncomfortable and less useful. Device instructions help, but they cannot replace a clinician’s assessment. Ask a physical therapist or surgeon to confirm the model, settings, and timing, especially after surgery or when pain changes. It is easy to focus on the machine and overlook whether the setup feels right.

Tips: Keep the treatment area clear, note the settings used, and stop if you notice sharp pain, new numbness, or unusual swelling. Contact your care team for guidance.

Small adjustments can matter. Recovery rarely follows a perfectly neat schedule.

Blog Tags:

volume-unmute-yellow-icon volume-unmute-blue-icon