Every year, hundreds of thousands of people survive a stroke, but recovery is often a long and difficult process. One of the biggest challenges is learning to walk again.
Weak muscles, poor balance, and reduced control of the legs can make even simple movements exhausting, meaning many survivors need months of physical therapy before they regain confidence and independence. A new study published in Science Robotics may offer a promising new way to improve this rehabilitation.
Researchers from Shirley Ryan AbilityLab and Northwestern University have developed an innovative system that combines human expertise with robotic technology.
Instead of replacing physical therapists, the new approach is designed to help therapists provide more effective and personalized treatment. The researchers call the system therapist-exoskeleton-patient interaction, or TEPI.
In traditional stroke rehabilitation, therapists often use their hands to guide a patient’s legs and body during walking practice.
This hands-on support is highly valuable, but one therapist can only assist with a limited number of movements at the same time. More complex walking exercises may require several therapists, making rehabilitation physically demanding and time-consuming.
Robotic exoskeletons have already been introduced into rehabilitation, but many current systems guide patients through fixed movement patterns. While they can help patients walk longer distances, they often cannot respond quickly enough to a person’s changing needs during therapy. This can reduce the flexibility that skilled therapists provide.
The TEPI system takes a different approach. Both the therapist and the stroke survivor wear lower-body robotic exoskeletons while walking on a treadmill. The two devices are connected through a virtual link that allows the therapist’s movements to influence the patient’s movements in real time, while also allowing the therapist to feel how the patient is moving.
This two-way connection creates a more natural interaction between therapist and patient. Therapists can instantly increase support, reduce assistance, or gently challenge patients depending on their performance. This makes the training more personalized while reducing the physical strain on therapists.
The research team tested the system in eight people recovering from stroke. They compared TEPI with standard therapist-guided treadmill training. Patients using the new system showed greater movement at their joints, took longer and higher steps, and achieved muscle activity similar to conventional therapy. Many participants also reported enjoying the sessions and feeling motivated.
Researchers believe these improvements are encouraging because motivation is an important part of successful rehabilitation.
People who enjoy therapy are often more willing to continue practicing, which can improve long-term recovery. The technology may therefore benefit both physical performance and patient engagement.
The scientists now plan to test the system in more everyday activities, including walking on regular ground, climbing stairs, and standing up from a chair. They also hope to develop simpler versions that could eventually support rehabilitation at home or allow therapists to guide patients remotely.
In review, this early study involved only a small number of participants, so larger clinical trials are still needed before TEPI becomes part of routine care. Nevertheless, the results suggest that combining robotic technology with the experience of physical therapists could make stroke rehabilitation more effective, less physically demanding for clinicians, and more enjoyable for patients.
If you care about stroke, please read studies about how to eat to prevent stroke, and diets high in flavonoids could help reduce stroke risk.
For more health information, please see recent studies about how Mediterranean diet could protect your brain health, and wild blueberries can benefit your heart and brain.
Source: Shirley Ryan AbilityLab.
