What is kyphosis in ankylosing spondylitis (AS)?
Kyphosis is a forward curvature of the spine that develops when AS progresses to more advanced stages. It occurs when new bone formation causes spinal fusion, leading to a bent-forward or "humpbacked" appearance. While a normal spine can bend up to 45 degrees, kyphosis is Show Full Answer
What is kyphosis in ankylosing spondylitis (AS)?
Kyphosis is a forward curvature of the spine that develops when AS progresses to more advanced stages. It occurs when new bone formation causes spinal fusion, leading to a bent-forward or "humpbacked" appearance. While a normal spine can bend up to 45 degrees, kyphosis is defined by curvature of 50 degrees or more on an X-ray. How does kyphosis affect the body?
Kyphosis can significantly impact breathing and muscle function. When the rib cage stiffens due to spinal fusion, it becomes harder for the chest to expand properly during breathing. The muscles of the heart and lungs may weaken because they cannot expand as much as they should. Additionally, postural muscles that help with balance, endurance, and coordination can become weaker. Managing kyphosis with AS:
To help maintain good posture and potentially slow progression:
- Take prescribed AS medications consistently
- Participate in physical therapy
- Practice range-of-motion and stretching exercises
- Use proper posture when sitting (feet flat, back supported, avoid crossing legs)
- When standing, keep knees slightly bent with feet shoulder-width apart
- Avoid sleeping on your stomach
March 27, 2025
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