Spondylolysis is a stress fracture or crack in a small part of a spinal vertebra called the pars interarticularis, usually in the lower back. It’s a common cause of lower back pain in young athletes, especially those involved in sports that require repeated bending backward or twisting.

An analogy…

Think of the vertebra like a bridge. The pars is the narrow section in the middle, and if that part weakens or cracks from too much stress, the bridge loses stability, that’s exactly what happens in spondylolysis.

What are other names that spondylolysis can be called?

Pars Defect, Lumbar Spine Stress Fracture, Stress Fracture of the Pars Interarticul

What causes spondylolysis?

Spondylolysis typically affects the L5 vertebra in the lower back. The pars interarticularis is a thin section of bone connecting the front and back parts of the vertebra. When this area is repeatedly stressed, especially with hyperextension movements, it can develop tiny fractures. If the fracture doesn’t heal properly, it can progress to spondylolisthesis, where the vertebra starts to slip forward.

What are the signs and symptoms of spondylolysis?

• Low back pain, especially during or after activity
• Pain with extension movements
• Tight hamstrings or muscle stiffness
• Pain that improves with rest and worsens with sport or movement
• In some cases, pain may refer to the buttocks, but usually not past the knees
• Tenderness when pressing on the lower back bones

What tests are used to diagnose on spondylolysis?

Palpation: The practitioner gently presses along the lower back, especially over the spinous processes to check for tenderness or a noticeable step-off, which may suggest a fracture or slippage of a vertebra. Pain on palpation near L5 is a key finding in spondylolysis.

Spinal Mobility Tests:
These involve assessing flexion, extension, side bending, and rotation to see if any movements reproduce the patient’s symptoms. Pain with spinal extension  is a classic sign of spondylolysis, as it loads the pars interarticularis.

How long does spondylolysis take to heal?

With early diagnosis and proper treatment, healing can occur in 6 to 12 weeks. Return to full sport or activity may take 3 to 4 months, depending on severity. If left untreated, it can lead to spondylolisthesis, requiring longer-term management

How does spondylolysis happen?

• Repetitive hyperextension or twisting
• Sudden increase in training or workload
• Weak glutes and core muscles that fail to support the spine
• Tight hip flexors or hamstrings adding strain to the lower back
• Poor technique in sports or lifting

What treatment can help spondylolysis?

• Rest from aggravating activities, especially sport
• Core and glute strengthening exercises
• Manual therapy for muscle tightness or joint stiffness
• Activity modification and gradual return to sport
• Anti-inflammatory medication for pain management
• Bracing may be recommended in moderate to severe cases to limit spinal extension

What exercises or stretches can I do for spondylolysis?

• Pelvic tilts and deep core activation
• Glute bridges and side-lying leg raises
• Hamstring and hip flexor stretches
• Postural retraining and safe lifting techniques

What products can help with spondylolysis?

• Wheatbag
• KT Pilates Band Pack
• KT Trigger Ball