Spondylolisthesis

Spondylolisthesis: vertebral slippage — causes, grades, and what helps

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Could spondylolisthesis be causing your back or leg pain?

The myBackPain assessment identifies the spondylolisthesis pattern and grades of severity — and distinguishes it from disc herniation and stenosis. Results in minutes.

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Grade I
accounts for the majority of cases — 0–25% slippage — usually manageable without surgery
L4/L5
is the most common level for degenerative spondylolisthesis in adults over 50
Often
asymptomatic — found incidentally on imaging performed for another reason

What is spondylolisthesis?

Spondylolisthesis occurs when one vertebra slips forward on the vertebra below it. It is more common than most people realise, affects a wide age range, and is frequently present without causing any symptoms. When it does cause pain, the nature of that pain and the appropriate management depend significantly on the type, grade, and individual circumstances.

Seek prompt assessment if you have:

Significant leg pain, tingling, or weakness alongside back pain • Any bladder or bowel changes • Rapidly worsening neurological symptoms • High-grade slippage (grade 3 or 4) on imaging • Back pain in a young person that is worsening despite rest.

Types and grades

Isthmic (Type II)
Results from spondylolysis — a pars interarticularis stress fracture. Most common in young athletes and adolescents. L5 on S1 is the most common level.
Degenerative (Type III)
The most common type overall, in adults typically over 50. Degeneration of the disc and facet joints allows gradual forward slippage. L4 on L5 most common. More common in women.
Grade I — 0–25%
Most common. Usually manageable conservatively. Often asymptomatic or causes only mild symptoms.
Grade II — 25–50%
May cause significant symptoms. Conservative management usually still appropriate.
Grade III — 50–75%
Significant structural change. Increased risk of neurological compromise. Specialist assessment required.
Grade IV — >75%
Severe slippage. Surgical assessment is typically indicated.

What does it feel like?

  • Lower back pain, often with stiffness and a sense of instability
  • Pain that may radiate into the buttocks and thighs
  • Leg pain, tingling, or weakness if neural structures are compressed
  • Worse with extension (leaning back) and prolonged standing — particularly in degenerative type
  • Walking tolerance that reduces as the day progresses
  • A tight, shortened stride in more significant cases as the body compensates

What helps?

Physiotherapy and core rehabilitation

The foundation of conservative management. Core strengthening, pelvic stability, and functional movement rehabilitation reduce the dynamic stress on the slipped segment. Most Grade I and II cases respond well.

Manual therapy

Gentle mobilisation and soft tissue work can reduce muscle spasm and pain. High-velocity manipulation directly over the unstable segment should be avoided. Indirect techniques addressing adjacent levels are safe and effective.

Activity modification

Avoiding sustained extension loading — standing with arched lower back, hyperextension exercises. Flexion-biased activity is generally better tolerated in spondylolisthesis.

Surgery

Spinal fusion is considered for high-grade slippage, significant neurological compromise, or failure of well-managed conservative care. Outcomes for appropriately selected patients are generally good.

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Download the Spondylolisthesis Fact SheetPDF — printable summary to share with your GP or practitioner

Not sure if spondylolisthesis is causing your back pain?

The myBackPain assessment identifies the spondylolisthesis pattern from your specific answers — and guides appropriate next steps based on your presentation.

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