For someone who spends much of the day seated, the right seating is about far more than a comfortable chair. Complex seating is a customised system that supports posture, protects the skin, and makes everyday activities easier. This article explains what complex seating is, how it supports good posture, comfort and daily function, who tends to benefit, how an occupational therapist prescribes it, and how it is funded and reviewed over time.
TLDR
- Complex seating is customised postural support built around the individual, not a standard wheelchair seat.
- It stabilises the pelvis, trunk and head, giving a steady base for movement and hand use.
- Pressure-relieving cushions and tilt-in-space help reduce the risk of pressure injuries.
- Better comfort means people can often sit for longer with less pain and fatigue.
- A stable, comfortable seated position supports eating, communication, breathing and daily activities.
- An occupational therapist assesses, measures, trials and prescribes the right seating system.
- Phase One Therapy supports adults across Brisbane with complex seating and assistive technology.
What complex seating is
Complex seating is a customised seating system designed around a person’s individual body and postural needs. It goes well beyond a standard wheelchair seat, using shaped supports, specialised cushions and adjustable features to hold the body in a safe, comfortable position. Because these systems are highly individual, they form part of complex assistive technology. Phase One Therapy supports adults with complex seating and assistive technology as part of its NDIS services.
A complex seating system is made up of several parts that work together. The table below shows some common components and what each one helps with.
| Component | What it helps with |
| Pressure-relieving cushion | Spreads load to protect the skin and add comfort |
| Contoured back support | Supports the spine and trunk alignment |
| Headrest | Steadies the head and neck |
| Lateral supports | Keep the trunk centred and upright |
| Tilt-in-space | Changes seat angle to redistribute pressure and rest |
| Positioning belts | Help hold the pelvis in a stable position |
How it supports good posture
Good seated posture starts at the pelvis. When the pelvis is stable and level, the spine, trunk and head can align more naturally above it. Complex seating supports this alignment, accommodates differences in muscle tone, and can help manage the effect of postural changes over time. A well-aligned, supported position also gives the person a steady base, so they can move their arms and head more freely.
Comfort and pressure care
Comfort is not a luxury when someone spends much of the day seated. Poor support can lead to pain, fatigue and sliding, while prolonged pressure on the skin raises the risk of pressure injuries. Complex seating helps in several ways, as set out below.
- Pressure-relieving cushions spread load across a wider area
- Tilt-in-space shifts weight to give the skin regular relief
- Better support reduces pain and the effort of staying upright
- Improved comfort can increase how long a person sits comfortably
Supporting everyday function
When posture and comfort are managed well, everyday function often improves too. A stable, supported seated position frees the hands for tasks and gives a steady base for activities. Many people find it easier to eat, drink, communicate and engage with those around them. Good positioning can also support breathing and swallowing, and reduce fatigue, making it easier to take part in daily life at home and in the community.
Who can benefit from it
Complex seating tends to suit people with more involved physical or postural needs. This might include limited trunk or head control, changes in muscle tone, spinal differences, or a high risk of pressure injuries. To understand how these needs affect daily life, an occupational therapist may complete a functional capacity evaluation alongside the seating assessment. Common situations include those below.
- Neurological and progressive conditions such as MS, MND or Parkinson’s
- Cerebral palsy or acquired brain injury
- Spinal cord injury or significant spinal changes
- Reduced sitting tolerance or ongoing discomfort
- A history of, or high risk of, pressure injuries
How an OT gets it right
Getting complex seating right takes careful assessment. An occupational therapist looks at the person’s posture, movement, muscle tone, skin and pressure risk, along with their goals and daily routines. They take measurements, often complete a hands-on mat assessment, and trial options with an equipment supplier before recommending a system. This work is carried out by occupational therapists who prescribe seating, who then help oversee fitting and adjustment.
Funding and ongoing review
Complex seating usually sits within the complex assistive technology part of an NDIS plan, so it needs a detailed assessment and a report showing it is reasonable and necessary. Needs also change over time, with growth, weight change or a shifting condition, so seating should be reviewed and adjusted rather than set and forgotten. Phase One Therapy offers in-home and telehealth appointments, which makes it easier to check that seating still fits day-to-day life.
Ready to explore seating options?
The right complex seating can make a real difference to posture, comfort and the activities that fill a person’s day. Understanding what it does, and how it is assessed, makes the process much easier to approach. Phase One Therapy provides occupational therapy for adults across Brisbane and surrounds, including complex seating and assistive technology. A conversation with an occupational therapist can help you work out what might suit your goals.
This article is intended for general information purposes only and does not constitute medical advice. NDIS categories and requirements can change, so please check current NDIS guidance and consult a qualified health professional for advice tailored to your individual needs.
