A3 Gait Training and Assessment System

The A3 Gait Training and Assessment System represents Yeecon’s flagship lower limb rehabilitation robot, designed to help patients with gait dysfunction relearn proper walking patterns through repetitive, robot-assisted training based on neuroplasticity principles.

Product Overview

Built as an electromechanical gait orthosis system, the A3 combines robotic leg supports with dynamic body weight support and a synchronized medical treadmill. The system targets patients who have lost walking ability due to stroke, traumatic brain injury, spinal cord injury, or other central nervous system disorders, providing guided locomotor training to stimulate neural pathway reorganization.

Unlike conventional gait training that relies primarily on therapist-assisted walking, the A3 enables consistent, reproducible stepping patterns with precisely controlled parameters—addressing the challenge of providing high-intensity, repetitive training that would otherwise exhaust human therapists.

Key Features

Designed for locomotor retraining in stroke and spinal cord injury patients, the A3 pairs robotic leg orthoses with a synchronized treadmill starting at 0.1 km/h minimum speed.

• Dual Gait Orthosis Design: Two independent leg units, each equipped with hip and knee joint drive systems mounted on a parallelogram frame structure
• Asian-Optimized Gait Curves: Step length, stride, and step width parameters designed specifically for Asian patient populations based on normative gait data
• Imported Servo Motors: Precision control of joint angles and walking speed using high-quality servo motor systems
• Active and Passive Training Modes: Adjustable guidance force allowing progression from fully passive to patient-initiated movement
• Spasticity Detection and Protection: Built-in safety features that detect muscle spasticity and provide protective responses
• Gait Offset Adjustment: Customization options to accommodate individual patient walking habits and asymmetries

Technical Specifications

Designed for stroke and neurological gait rehabilitation, the A3 supports passive, active-assisted, and active training modes on a synchronized medical treadmill with minimum speed of 0.1 km/h.

Body Weight Support System

The integrated weight support system operates in two modes:

Static Support: Enables vertical lifting and lowering of patients, facilitating transfer from wheelchair to standing position on the treadmill.

Dynamic Support: Provides real-time body weight adjustment throughout the gait cycle, reducing effective body weight during training while maintaining natural weight-shifting patterns essential for proper gait mechanics.

The dynamic support capability is particularly valuable for early-stage patients with minimal muscle strength, allowing them to practice stepping movements under reduced gravitational load.

Clinical Applications

The A3 system addresses rehabilitation needs across multiple neurological conditions:

• Post-stroke hemiplegia: Repetitive locomotor training to restore walking patterns in patients with one-sided weakness
• Incomplete spinal cord injury: Gait retraining for patients retaining some lower limb function
• Traumatic brain injury: Motor function recovery through intensive stepping practice
• Other neurological disorders: Parkinson’s disease, multiple sclerosis, and other conditions affecting gait

Clinical evidence supporting robot-assisted gait training indicates that task-specific, repetitive practice with appropriate sensory feedback can support motor learning and functional recovery in neurological patients.

Assessment Functions

Beyond training, the A3 provides evaluation capabilities:

• Patient performance tracking and data recording
• Training session documentation with stored user databases
• Progress analysis tools for therapists
• Printable assessment reports for clinical documentation

The software interface features virtual scenario environments designed to enhance patient engagement during repetitive training sessions.

Regulatory Status

Frequently Asked Questions

What patients are suitable for A3 gait training?

The A3 is designed for patients with lower limb dysfunction caused by central nervous system damage including stroke, traumatic brain injury, and spinal cord injury. Patients should have sufficient cognitive function to participate in training and no severe orthopedic contraindications that would prevent use of robotic leg orthoses.

How does the A3 differ from conventional treadmill training?

Unlike standard treadmill walking with manual therapist support, the A3 provides computer-controlled, reproducible gait patterns with precisely adjustable parameters. The robotic orthoses guide leg movements through physiologically normal stepping trajectories while the body weight support system enables patients with significant weakness to practice walking before they can bear full body weight.

What training intensity can the A3 provide?

The A3 enables high-repetition gait training that would be difficult to achieve through manual therapy alone. Treadmill speeds start as low as 0.1 km/h, and guidance force levels can be adjusted from fully passive movement to minimal assistance as patients recover function.