care & love
Recovering from a hip or knee replacement is a major milestone — but the journey doesn't end when you leave the operating room. Regaining the ability to walk smoothly, confidently, and without pain takes time, patience, and the right support. For many patients, a lower limb exoskeleton robot — also known as a walking robot — has become a powerful ally in post-surgery rehabilitation, helping people get back on their feet faster and more safely than traditional methods alone.
After a total hip arthroplasty (THA) or total knee arthroplasty (TKA), patients often face a temporary but significant decline in mobility. Swelling, stiffness, and muscle weakness are common in the first few weeks. Many people develop protective limping patterns — the body's natural way of avoiding pain — but these can become ingrained habits that are hard to break later. In fact, studies have shown that walking speed and knee range of motion can ｄｒｏｐ substantially in the first two weeks after knee replacement surgery, and patients are frequently discharged from the hospital before their walking ability has fully recovered.
Traditional physical therapy — including range-of-motion exercises, muscle strengthening, and balance training — remains essential. But increasingly, rehabilitation specialists are turning to robotic gait training to bridge the gap between early post-surgery fragility and full, independent mobility.
A lower limb rehabilitation exoskeleton is a wearable robotic device that wraps around the legs, from the hip down to the ankle. Unlike a rigid brace or crutch, it actively assists with movement — using motors, sensors, and intelligent software to guide the legs through a natural walking motion. Here is how it helps patients recovering from hip or knee replacement:
One of the biggest risks after joint replacement is putting too much load on the surgical site too soon. A walking robot redistributes body weight and provides powered assistance, so the new hip or knee joint is not forced to bear full weight during each step. This creates a safer environment for tissues to heal while still allowing the patient to practice standing and walking.
After surgery, the brain and body can "forget" how to walk properly. Uneven strides, reduced step length, and asymmetrical weight distribution are common. Walking robots use multi-sensor fusion to detect movement intentions and gently correct the gait — guiding the hip, knee, and ankle through the proper range of motion with each step. Over time, this repetitive, high-frequency training helps the nervous system relearn a balanced, symmetrical walking pattern.
Building muscle strength and coordination after surgery requires hundreds — even thousands — of repetitions. But pain and fatigue often limit how much a patient can do in a single session. The powered assist from a walking robot reduces the effort required for each step, allowing patients to complete more walking cycles without becoming exhausted. More repetitions mean faster progress in rebuilding strength and endurance.
The psychological side of recovery is just as important as the physical. Many patients are afraid of stumbling or falling, which makes them hesitant to move — and that hesitation can slow recovery. Knowing that a walking robot provides stable, responsive support helps patients feel secure enough to push their limits safely, building confidence with every step.
At Mona Care, we offer a range of advanced lower limb exoskeleton robots designed to support patients at different stages of recovery and across different age groups. All our walking robots are IEC 60601 certified for safety and reliability, and they are built with biomechanical modeling that simulates the natural human gait for precise, effective rehabilitation.
The Bear Adult is designed for adults recovering from lower limb motor dysfunction caused by stroke, spinal injuries, or — importantly — post-surgery rehabilitation following hip or knee replacement. It delivers a continuous output of up to 50 Nm of torque, enabling training in various functional modes that comprehensively improve lower limb mobility. The Bear Adult is suitable for use in rehabilitation departments, neurology departments, neurosurgery departments, and intensive care units under the supervision of professional medical staff.
The Gait Assist is a more personalized walking robot equipped with multi-sensor fusion technology that identifies the user's movement intentions in real time. This means the device can adapt to the individual's unique walking pattern — providing assistance exactly when and where it is needed. Key features include motion intention recognition for active walking, comfortable human-machine interaction, personalized parameter adjustment for precise rehabilitation, and training data export for medical, educational, and research purposes. It is ideal for patients who need tailored, adaptive support during their recovery journey.
Recovery is not just for adults. The Rabbit Kid is a children's lower limb exoskeleton robot designed for younger patients with lower limb motor function disorders. It features safe and comfortable human-machine interaction design and multiple training modes to enhance active motor skills. The Rabbit Kid has already been used in respected institutions such as the Hong Kong Christian Service's Pui Yi School, the Hong Kong Red Cross' Margaret Trench School, and the Duchess of Kent Children's Hospital.
Clinical research supports the effectiveness of walking robots in post-surgery recovery. A case-controlled clinical trial published in Geriatric Orthopaedic Surgery & Rehabilitation examined the use of a hip-wearable exoskeleton robot for gait training in patients who underwent total knee arthroplasty. The study found that patients who used the exoskeleton robot did not experience the temporary decline in walking speed that typically occurs two weeks after surgery — unlike the control group, which showed a significant ｄｒｏｐ. The researchers concluded that exoskeleton-assisted gait training was safe, feasible, and effective for promoting early improvement in walking ability after TKA.
Another study published in the Journal of Clinical Medicine found that mobile robot-based gait training after total hip arthroplasty resulted in significantly higher walking speeds, suggesting that such interventions may help shorten the length of hospital stays. These findings reinforce what rehabilitation professionals have observed in practice: walking robots are not just a futuristic concept — they are a practical, evidence-backed tool for faster, safer recovery.
Start Under Professional Supervision
Always begin using a walking robot under the guidance of a qualified physical therapist or rehabilitation specialist. They will adjust the device settings to match your specific recovery stage, joint condition, and mobility goals.
Consistency Matters More Than Intensity
Even 15 to 20 minutes of robot-assisted walking per session, done consistently over several weeks, can produce meaningful improvements. Clinical protocols often involve 4 to 5 sessions per week during the early post-surgery phase. Do not rush — quality of movement is more important than quantity.
Listen to Your Body
Mild discomfort during rehabilitation is normal, but sharp pain, increased swelling, or unusual numbness are signs that you should stop and consult your therapist. The walking robot should support your movement, not cause new problems.
Combine with Traditional Therapy
Walking robots work best as part of a comprehensive rehabilitation program that includes muscle strengthening, range-of-motion exercises, and balance training. They are designed to complement — not ｒｅｐｌａｃｅ — the hands-on care provided by your physical therapist.
Track Your Progress
Many modern walking robots, including the Gait Assist from Mona Care, can export training data. Share this information with your therapy team to monitor improvements in walking speed, step symmetry, and joint range of motion over time. Data-driven insights help tailor the rehabilitation plan to your evolving needs.
Recovering from a hip or knee replacement is a deeply personal journey, but you do not have to walk it alone. Walking robots — or lower limb exoskeleton robots — represent a new chapter in rehabilitation: one where technology works hand-in-hand with the human body to restore mobility, rebuild confidence, and help patients return to the activities they love. Whether you are a rehabilitation professional looking to equip your facility or a patient exploring your options, Mona Care is here to help. Our walking robot solutions — the Bear Adult, Gait Assist, and Rabbit Kid — are designed with safety, precision, and real-world effectiveness in mind. Reach out to our team to learn more about how robotic gait training can support your recovery or your patients' rehabilitation journey.
If you have questions about our walking robot products or would like to discuss how they can fit into your rehabilitation program, please contact us — we are happy to help.