Mobility, independence and adaptations in Hurler syndrome (MPS I-H)
Hurler syndrome (severe MPS I, MPS I-H) often affects bones, joints and muscles. Stiffness, pain, spinal changes and hip problems can make walking and everyday movements harder over time, even after haematopoietic stem cell transplantation (HSCT) or enzyme replacement therapy (ERT).
This page explains how Hurler syndrome affects mobility, the supports and equipment that can help, and how families, therapists and doctors can work together to keep children and adults as independent and active as possible.
Bones, joints and muscles
Hurler syndrome causes glycosaminoglycan (GAG) storage in bones, cartilage, ligaments and soft tissues. This can lead to:
- Short stature and altered body proportions
- Stiff joints and reduced range of movement
- Spinal curvature (kyphosis, scoliosis)
- Hip dysplasia and knee or ankle deformities
- Tight tendons and carpal tunnel syndrome
These changes can make walking, climbing stairs, running, standing for long periods and fine hand movements more difficult. Mobility needs usually change with age, surgery history and overall health.
What mobility difficulties can look like day to day
Children, teenagers and adults with Hurler syndrome may:
- Tire quickly when walking, especially uphill or over long distances
- Have difficulty keeping up with peers in school, playground or work settings
- Find stairs, uneven ground and long corridors challenging
- Struggle with floor sitting, low chairs or deep sofas
- Have trouble getting in and out of cars, baths or bed without help
- Experience hand weakness or stiffness, making buttons, zips and writing harder
These difficulties are not always obvious. People may appear to walk well over a short distance but be exhausted or in pain afterwards. It is important to listen carefully to what the child or adult says about their comfort and stamina.
Keeping joints moving and muscles strong
Physiotherapists play a central role in mobility and independence for people with Hurler syndrome. They can:
- Assess posture, gait, joint range and muscle strength
- Provide tailored exercise and stretching programmes that are safe for the spine and joints
- Advise on pain management, warm up and cool down routines
- Support early mobilisation after orthopaedic or spinal surgery
- Help decide when walking aids or wheelchairs would reduce strain and improve stamina
Programmes should be realistic and flexible. On some days, a child or adult may manage more activity. On others, pain or fatigue may mean a lighter plan is needed.
Adapting everyday tasks and environments
Occupational therapists (OTs) focus on helping people do the activities that matter to them, at home, school, work and in the community. For Hurler syndrome this may include:
- Assessing how a person manages dressing, bathing, toileting, feeding, writing and using technology
- Suggesting adaptive equipment such as grab rails, raised toilet seats, bath boards, long handled sponges, adapted cutlery and writing tools
- Recommending seating and desk solutions that support posture and reduce pain
- Advising on energy conservation, for example pacing tasks and alternating heavy and light activities
- Supporting applications for housing adaptations, equipment funding or disability benefits
OTs can also help identify when personal assistance or care support would improve safety and independence.
Braces, splints and shoes
Many people with Hurler syndrome benefit from orthotic devices, prescribed by orthotists together with physio and orthopaedic teams. Examples include:
Lower limb orthotics
- Ankle foot orthoses (AFOs) to improve stability and walking pattern
- Knee or hip braces in selected situations, for example after surgery
Upper limb splints
- Hand and wrist splints to support weak or stiff joints and help with function
- Comfort-focused designs that support daily tasks
Footwear and insoles
- Insoles or custom footwear to accommodate foot shape and improve comfort
- Regular review as needs change with growth and surgeries
The aim is to improve function and comfort, not to force the body into uncomfortable positions. Orthotics may need regular review as the child grows or adult needs change.
Tools for independence, not signs of failure
Mobility aids can reduce pain and fatigue and allow people with Hurler syndrome to participate fully at school, work and in the community.
- Using a wheelchair or scooter can increase independence, not reduce it.
- Many children choose a mix of walking for short distances and wheels for longer ones.
- Equipment should be individually assessed and fitted, taking into account home, school and transport.
Buggies and strollers
- For younger children who cannot manage long distances
- Helpful on busy days and long appointments
Walking frames and rollators
- Extra stability and confidence outdoors
- Can reduce falls and conserve energy
Manual wheelchairs
- Useful for longer distances or pain flare-ups
- Supports participation without overexertion
Powered chairs and scooters
- For covering larger distances independently
- Often helpful for teens and adults
OTs, physiotherapists and wheelchair services can advise on funding, choice and training.
Making home safer and easier
Practical changes at home can reduce strain and improve safety for the person with Hurler syndrome and their family. Depending on local systems, funding may be available for:
Bigger changes
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Access changes
- Ramps instead of steps, wider doorways for wheelchairs
- Handrails on stairs and external steps
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Bathroom adaptations
- Level access showers, shower chairs, non slip flooring
- Grab rails and raised toilets
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Bedroom and living space
- Adjustable height beds
- Suitable chairs with good support and appropriate seat height
- Thoughtful furniture layout to create clear paths for walking aids or wheelchairs
Smaller, low cost changes
- Moving frequently used items to easy reach
- Using long handled tools and kitchen aids
- Adding good lighting and contrasting edges on steps or thresholds
Small changes can reduce daily strain and protect energy for the things that matter most.
School and education
For school, adaptations may include:
- Step free access, lifts and accessible toilets
- Shorter walking routes between classrooms
- Permission to use lifts even if reserved for staff or emergencies
- A parking space close to the entrance or safe drop off area
- Adjusted timetables to reduce movement between far apart rooms
Work and community
In the community, families and adults can:
- Ask about accessible entrances and seating when booking activities or travel
- Use disabled parking schemes and transport assistance where available
- Plan outings with rest breaks and realistic walking distances
Reasonable adjustments for education and employment are often protected in law, though details vary by country.
Balancing activity and rest
Pain and fatigue are tightly linked to mobility. Overdoing activity on a good day can lead to significant pain and exhaustion later. Helpful principles:
- Encourage regular, moderate activity rather than boom and bust patterns
- Build in planned rest breaks, not only when pain is severe
- Use mobility aids proactively to conserve energy for activities that matter most (for example school, social events, hobbies)
- Review pain management regularly with the medical team, including both medicines and non drug strategies
Families and adults should feel comfortable raising concerns about pain or worsening fatigue. These may signal that orthopaedic problems need reassessment or that equipment needs updating.
Everyday strategies that can help
- Keep a simple mobility diary for a week to see when pain or fatigue are worst and which activities are most demanding.
- Involve children and teenagers in choosing equipment colours and styles so it feels personal and acceptable.
- Ask your team directly: "Would a walking aid or wheelchair help protect joints and energy rather than waiting until things get worse?"
- Review home and school environments each year, or after surgery or growth spurts, to check adaptations are still appropriate.
- Remember that needing more support over time is a natural part of the condition, not a failure by you or your child.
Clinical considerations
Professionals can support mobility and independence by:
- Recognising that skeletal disease in Hurler syndrome often progresses despite HSCT and ERT, and planning ahead for likely mobility changes.
- Referring early to physiotherapy, occupational therapy, orthotics and wheelchair services rather than waiting for crisis.
- Coordinating with orthopaedic surgeons so that surgery, rehabilitation and equipment needs are aligned.
- Asking specifically about pain, fatigue and participation at school, work and in the community, not only about walking distance in clinic.
- Writing clear letters that support applications for housing, equipment funding, education plans and disability benefits.
Key points about mobility and adaptations in Hurler syndrome
- Hurler syndrome commonly affects bones and joints, leading to increased pain, stiffness and mobility difficulties over time.
- Physiotherapy, occupational therapy, orthotics and appropriate mobility aids can significantly improve comfort, independence and participation.
- Wheelchairs, scooters and home adaptations are tools for independence, not signs of giving up.
- Regular review of mobility, pain and fatigue helps teams adjust supports as needs change with age and treatment.
- Thoughtful adaptations at home, school, work and in the community allow children and adults with Hurler syndrome to focus their energy on the activities that matter most.