What it is
Spondylolisthesis is the forward slip of a vertebra relative to the one below. In adolescents, it is usually due to a pars defect (isthmic type) and is often of low grade. Symptoms vary from none to back pain with sport. Higher grades or neurological signs require specialist review.
Care aims to calm pain, restore hip and trunk strength, and guide sport safely while monitoring the slip.
What happens when it occurs
The pars defect reduces posterior stability. Extension and rotation loads are provocative early. With conditioning and technique adjustments, most adolescents can manage a low-grade slip effectively.
Common causes and risk factors
- Progression from spondylolysis
- High volumes of extension and rotation sports
- Rapid growth and deconditioning
- Family factors in some cases
Who is most affected
Adolescents in extension-dominant sports in Australia. Screening often follows persistent back pain rather than acute injury.
Typical symptoms
- Achy low back pain with extension or prolonged standing
- Tight hamstrings and reduced hip extension
- Occasionally, leg symptoms with higher grades
When to seek care
Persistent pain, neurological change, or suspected progression. Urgent review for weakness, numbness, or symptoms affecting bladder or bowel function.
How we diagnose
History and movement testing, palpation, flexibility and strength checks, and imaging to classify grade when indicated. Standing lateral X‑ray quantifies slip; MRI assesses tissues; CT is for bony detail.
Management
- Relative rest from provocative extension and rotation
- Hip extension mobility; gluteal and trunk endurance
- Technique coaching for sport skills and lifting
- Graded return-to-play plan with clear criteria
- Surgical consultation for high-grade or progressive slips
Rehabilitation milestones
Phase 1 weeks 0–2: pain control, gentle mobility, walking and biking.
Phase 2 weeks 2–8: progressive strength, anti-rotation control, skill retraining.
Phase 3 months 2–6: full training volumes and competition by criteria.
Readiness to progress
- Pain-free extension and running drills
- Strength and endurance benchmarks met
- Stable imaging and clinical review when required
Prevention
- Monitor training loads during growth spurts
- Keep posterior chain and trunk endurance work year-round
- Use technique checkpoints for extension skills
Australia snapshot
- Seen across school and club sports, most slips are low-grade and managed conservatively.
- Girls are more often represented in dance and gymnastics, while boys are more often found in cricket and AFL pathways.
- Return to play is usual with structured rehabilitation and monitoring
Latest insights
Capacity and coaching keep low‑grade slips quiet.
Progress is paced by symptoms, function, and, when needed, imaging.
