Region affected
Spine / Sacroiliac joints
Common in
Adults under 40, male predominance
Onset
Gradual (inflammatory)
Related conditions
SIJ Dysfunction, Spinal Stenosis, Facet Joint Syndrome
Ankylosing spondylitis (AS) is a form of inflammatory arthritis that primarily affects the spine and sacroiliac joints. It belongs to a broader group of conditions known as axial spondyloarthritis, and causes inflammation within the spinal joints and ligaments that, over time, can lead to stiffness, reduced mobility and in some cases fusion of spinal segments.
AS typically begins in early adulthood, usually before the age of 40, and often goes undiagnosed for years because its early symptoms closely resemble common mechanical back pain. Unlike mechanical back pain, however, ankylosing spondylitis follows an inflammatory pattern: symptoms are typically worse after rest and improve with movement. Morning stiffness lasting more than 30 to 60 minutes is a characteristic feature. There is also a strong genetic association, the HLA-B27 gene is present in the majority of people with AS, though most HLA-B27 carriers do not develop the condition.
Physiotherapy is a cornerstone of AS management at all stages, alongside medical treatment coordinated by a rheumatologist.
The exact cause of ankylosing spondylitis is not fully understood, but key factors include:
AS symptoms typically develop gradually and may include:
The exact cause of ankylosing spondylitis is not fully understood, but key factors include:
AS symptoms typically develop gradually and may include:
At The MSK Studio in Adelaide, physiotherapy management of ankylosing spondylitis focuses on maintaining spinal mobility, preserving posture, managing pain and stiffness, and building the physical capacity to support long-term spinal function. We work closely with treating rheumatologists and GPs to ensure our physiotherapy program aligns with the medical management of the condition.
See our low back pain physiotherapy service below:
Related Conditions