The ExoMotus M4 is Fourier Rehab's flagship lower-limb gait-rehabilitation exoskeleton: a powered hip-and-knee exoskeleton integrated with a balance support frame and dynamic weight support. It delivers repetitive, physiological gait training for patients with stroke, spinal cord injury and other neurological or musculoskeletal disorders, with gait parameters such as speed, stride length and guidance force tuned per patient. Real-time gait, joint-angle and step-count feedback support objective rehabilitation reporting.
Highlights
- 6 degrees of freedom: 4 active hip/knee joints plus 2 passive ankle joints
- Programmable walking speed of 0.44-1.3 km/h with adjustable stride length and step height
- Fits patients 150-190 cm tall and up to 100 kg, with automated leg-length matching
- Up to 8 hours of continuous walking per battery charge
- 84 x 112 x 150 cm (+/-5 cm) frame with built-in balance support and fall prevention
- Two gait modes (Walk on the Spot and Ground Walking) plus sit-to-stand training
Technical parameters
Mechanics
| Degrees of freedom | 6 total (4 active + 2 passive) |
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| Active joints | 4 active DOF - bilateral hip and knee |
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| Passive joints | 2 passive DOF - bilateral ankle with anti-foot-drop spring mechanism |
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| Device dimensions (L x W x H) | 84 cm x 112 cm x 150 cm (+/-5 cm) |
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| Patient fit adjustment | Adjustable thigh and shank length, hip width and support height with automated leg-length matching |
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| Support structure | Built-in ergonomic balance support frame with dynamic weight support and integrated seat |
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Motion
| Walking speed | 0.44-1.3 km/h (adjustable) |
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| Vertical motion | Vertical degree of freedom for realistic weight shifting and elevation change |
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| Patient positions | Sitting, standing and walking |
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Performance
| Training modes | 2 primary gait modes - Walk on the Spot and Ground Walking - plus sit-to-stand transfer |
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| Adjustable gait parameters | Stride length, step height, speed and guidance force |
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| Real-time feedback | Gait pattern, joint angles and step count with automated reports |
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| Continuous walking time | Up to 8 hours per charge |
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Physical
| Patient height range | 150-190 cm |
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| Maximum patient weight | 100 kg |
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Display
| Display | Touchscreen tablet for selecting training modes and gait parameters |
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Power
| Battery | Intelligent modular rechargeable battery (about 8 h continuous walking) |
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Safety
| Safety systems | Emergency stop, automatic calibration, speed and position limitation, joint overload protection and fall prevention |
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| Peripheral stimulation | Foot plantar sensory feedback during training |
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Connectivity
| Connectivity | WiFi for training control and monitoring |
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Regulatory
| EU market access | CE MDR (TUV SUD) obtained at Fourier Rehab portfolio level, announced June 2024 |
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Applications
- Early standing and verticalisation training after stroke or spinal cord injury
- Overground gait training on flat terrain and gentle inclines
- On-the-spot stepping (Walk on the Spot) training
- Sit-to-stand transfer training
- Gait symmetry, balance and coordination training
- Spasticity management and abnormal gait-pattern correction
- Post-orthopaedic lower-limb gait rehabilitation
- Gait biomechanics and neuroplasticity research
Manufacturer
Fourier Intelligence (Fourier Rehab), Shanghai, Shanghai · https://www.fftai.com
Fourier Intelligence is a private Shanghai robotics company founded in 2015 that develops rehabilitation robotics and general-purpose humanoid robots. Its Fourier Rehab division makes upper- and lower-limb rehabilitation robots and reports installations in more than 60 countries, with corporate offices in Shanghai, Singapore and Kuala Lumpur. The company raised a Series E round led by SoftBank Vision Fund 2 with Saudi Aramco's Prosperity7 Ventures.
Sources
- https://www.fftai.com/en/rehab/solution/exoMotusM4
- https://www.healthlinkholdings.com/products/healthlink-gies-products/exomotus-m4
- https://www.madisson.cz/produkt/370-exomotustm-m4
- https://www.youtube.com/watch?v=0uhC-4KiIDo