Spondylolisthesis: What It Is, Grades, Symptoms and Treatment

Man holding his lower back with pain from spondylolisthesis

Table of Contents

Spondylolisthesis means one vertebra has slipped forward on the one below it, most often at L4-L5 or L5-S1. It sounds alarming, but most people with a low-grade slip live active lives, and a strength-based programme is the main treatment.

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Most common levels L5-S1 (isthmic) and L4-L5 (degenerative)
Key symptoms Low back pain with standing or arching back, tight hamstrings, sometimes leg symptoms
Main treatment Core and hip strength, activity changes, gradual return to sport
Typical improvement 8 to 12 weeks of consistent rehab
Surgery Mainly for high-grade or progressing slips, or persistent nerve symptoms

Types and causes

  • Isthmic: a stress fracture in the pars interarticularis (spondylolysis) lets the vertebra slip. Common in young athletes in sports with repeated back extension, such as gymnastics, cricket fast bowling, rugby and diving.
  • Degenerative: wear in the discs and facet joints allows slipping, usually over 50 and more often in women. Often occurs with spinal stenosis.
  • Less common types: congenital, traumatic and post-surgical.

Grades

Grade 1 Up to 25% slip
Grade 2 25 to 50%
Grade 3 50 to 75%
Grade 4 Over 75%

Most people have grade 1 or 2, which usually respond well to conservative treatment.

Symptoms

  • Lower back pain, often worse when standing, walking or arching backwards
  • Tight hamstrings and a feeling that the back is unstable or catching
  • Pain, tingling or heaviness into the buttocks or legs
  • Leg symptoms on walking that ease with sitting, when stenosis is also present

Seek urgent medical care if: you have numbness around the groin, bladder or bowel changes, or worsening leg weakness.

How is it diagnosed?

A standing X-ray shows the slip and its grade; flexion and extension X-rays can show if it moves. An MRI is used when there are nerve symptoms. A young athlete with low back pain on extension may need a scan to check for a pars stress fracture.

Treatment

  • Core and hip strengthening to control the spine, progressing to loaded exercises
  • Reducing repeated or heavy back extension while symptoms settle
  • Hamstring and hip mobility work
  • Coached return to sport and lifting, with technique changes where needed
  • Hands-on treatment and, for degenerative cases, walking and weight management

What you can do at home

  • Start with gentle core exercises such as dead bugs, bridges and side planks from the knees
  • Avoid sleeping on your stomach and long periods standing with your back arched
  • Stay active with walking, cycling or swimming

Outlook

The slip itself usually stays the same, and in adults it rarely progresses. Pain and function can improve a lot as strength and control improve.

Frequently asked questions

Can spondylolisthesis be reversed?

No, but most people become pain-free or close to it with the right programme.

Can I go to the gym?

Yes. Strength training is one of the best treatments, with the right exercise choice and technique.

How do I sleep with spondylolisthesis?

On your side with a pillow between your knees, or on your back with a pillow under your knees.

Will it get worse?

In adults it rarely progresses. Teenagers with isthmic slips are monitored while still growing.

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References

  1. Kalichman L, Hunter DJ. Diagnosis and conservative management of degenerative lumbar spondylolisthesis. Eur Spine J. 2008;17(3):327-335. Link
  2. Meyerding HW. Spondylolisthesis. Surg Gynecol Obstet. 1932;54:371-377.
  3. National Institute for Health and Care Excellence (NICE). Low back pain and sciatica in over 16s: assessment and management (NG59). 2016, updated 2020. Link

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