Equipment
Power-Assist Devices
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For many people living with a spinal cord injury (SCI), a manual wheelchair provides freedom, flexibility, and the ability to stay active. However, the physical demands of propelling a wheelchair every day can take a toll on your body. Whether you’re travelling to work, pushing up ramps, navigating uneven sidewalks, or simply moving around your home, repetitive wheelchair propulsion can lead to fatigue, muscle strain, and shoulder pain.
In fact, research shows that approximately 71% of manual wheelchair users experience shoulder pain during their lifetime. Because your shoulders play such an important role in mobility, protecting them is essential for maintaining your independence and quality of life.
Power-assist devices are designed to help reduce the effort required to propel a manual wheelchair while allowing you to maintain the flexibility and benefits of using a manual chair. For many people with SCI, they provide the perfect balance between independence, efficiency, and preserving upper limb health.
What Is a Power-Assist Device?
A power-assist device is a motorized attachment that connects to a manual wheelchair and can supplement or replace the physical effort needed to propel your wheelchair. Instead of replacing your manual wheelchair, it enhances it by reducing the amount of force you need to push.
Power assist can make everyday activities easier by helping you:
- Travel longer distances with less fatigue
- Climb ramps and hills more easily
- Navigate curbs and uneven terrain
- Reduce wear and tear on your shoulders and arms
- Maintain the lightweight feel and portability of a manual wheelchair
For many wheelchair users, power assist offers the convenience of powered mobility while preserving the independence and exercise benefits of self-propelling.
Why Protecting Your Shoulders Matters
- Shoulder pain
- Tendon injuries
- Rotator cuff problems
- Muscle imbalance
- Muscle fatigue
- Reduced ability to propel your wheelchair independently
How Do Power-Assist Devices Work?
Power-assist devices use an electric motor to supplement your pushing effort. Depending on the model, the motor activates either when you push on the hand rims or when you use an alternative control system.
Many modern devices can be operated using:
- Push-rim sensors
- Joysticks
- Switch controls
- Bluetooth-connected wristbands or smartwatches
- Smartphone apps
Many systems also allow users to customize settings such as speed, acceleration, assistance level, traction control, and battery monitoring to match their lifestyle and mobility needs.
Types of Power-Assist Devices
Rear-Mounted Devices
Rear-mounted devices attach near the wheelchair’s rear axle and provide power through a motorized drive wheel.
Benefits
- Lightweight and portable
- Easy to remove for transportation
- Excellent for travel
- Suitable for indoor and outdoor use
- Programmable speed and performance
- Minimal drag when turned off
Things to Consider
- May require learning a new control method
- Performance can vary on very steep or loose surfaces
- Battery life depends on terrain, user weight, and settings
Rear-mounted systems are an excellent choice for many users who want a balance between portability and everyday performance.
Front-Mounted Devices
Front-mounted devices attach to the front of the wheelchair, lifting the front casters off the ground and creating a three-wheel configuration.
Benefits
- Handles grass, gravel, snow, and uneven terrain more easily
- Excellent for outdoor recreation
- Helps navigate curbs and rough sidewalks
- Quick to attach and remove
Things to Consider
- Makes the wheelchair longer
- Can be more difficult to manoeuvre indoors
- Generally larger and heavier to transport
If you spend a lot of time outdoors or enjoy trails and community activities, a front-mounted device may provide the extra capability you need.
Powered Wheels (Hub-Mounted Systems)
Powered wheels replace your standard rear wheels with motorized wheels that contain built-in batteries and motors.
Sensors detect each push on the hand rims and automatically provide additional assistance.
Benefits
- Smooth, natural propulsion
- Assistance with every push
- Highly customizable
- Excellent performance on a variety of surfaces
Things to Consider
- Heavier than other systems
- Wheels may need to be removed during transport
- Additional wheelchair adjustments may be required
Powered wheels are often a good option for users who want power assistance while maintaining a familiar pushing technique.
Benefits of Power Assist
Choosing the right wheelchair involves much more than selecting a seat. Proper fit and configuration can significantly impact comfort, mobility, and long-term health.
Reduced Physical Strain
Power assist reduces the effort needed to propel your wheelchair, helping protect your shoulders, arms, and wrists from repetitive strain.
Increased Energy
Using less energy for mobility means having more energy available for work, hobbies, family, and the activities you enjoy.
Flexible and Portable
Many systems are designed to be removed quickly for transportation, allowing users to continue benefiting from the portability of a manual wheelchair.
Is Power Assist Right for You?
Power assist may be worth considering if you:
- Experience shoulder pain or fatigue while propelling your wheelchair
- Want to travel longer distances independently
- Need assistance on hills or uneven terrain
- Wish to stay active while reducing physical effort
- Want to preserve your shoulder health for the future
An occupational therapist or physiotherapist specializing in seating and mobility can assess your needs and recommend the most appropriate equipment.
Questions to Ask Before Choosing a Device
Every person’s mobility goals are different. Before purchasing a power-assist device, consider asking:
- Where will I use it most—indoors, outdoors, or both?
- Will it fit my current wheelchair?
- How much does it weigh?
- Can I lift it into my vehicle independently?
- How easy is it to attach and remove?
- What is the battery range?
- What maintenance does it require?
- What control method works best for my hand function?
- Is training available?
- How much does it cost?
- What funding programs can help cover the cost?
Trying different models through a seating clinic or equipment vendor can help you identify the option that best suits your lifestyle.
Every individual’s mobility needs are different.
This is why professional assessment and personalized equipment selection are so important. Our SCIO Service Navigation Coordinators can assist you in connecting with occupational therapists as well as reviewing funding options. Our Peer Support Coordinators can connect you with a Peer Mentor to help provide practical advice for daily living.
Power-assist devices are helping many people with spinal cord injuries stay active, independent, and engaged in their communities. By reducing the physical demands of manual wheelchair propulsion, they can help protect shoulder health, decrease fatigue, and make everyday travel more comfortable.
The best power-assist device is the one that fits your lifestyle, budget, mobility goals, and physical needs. Whether you’re looking to travel farther, reduce pain, or simply make everyday mobility easier, there are a variety of options available.
