Recovery Insights Blog | Foundational Rehab

What Is Spondylolisthesis?

Spondylolisthesis is a condition where one vertebra slips forward over the one below it. The word comes from Greek: "spondylo" (vertebra) + "olisthesis" (slipping).

It most commonly occurs in the lower back (lumbar spine), usually at L4-L5 or L5-S1.

Types of Spondylolisthesis

Isthmic

Most common in younger people

Caused by a defect or fracture in the pars interarticularis (a bony bridge in the vertebra)

Often from repetitive extension/rotation (gymnastics, football linemen, dancers)

May have been present since adolescence

Degenerative

Most common in older adults

Results from wear and tear on discs and facet joints

More common in women

Usually L4-L5

Other Types

Congenital (born with abnormal vertebra)

Traumatic (from significant injury)

Pathologic (from bone disease)

Grading

Based on how far the vertebra has slipped:

**Grade I:** 0-25% slip (most common, often asymptomatic)

**Grade II:** 25-50% slip

**Grade III:** 50-75% slip

**Grade IV:** 75-100% slip

**Grade V:** >100% slip (spondyloptosis)

Most people have Grade I or II, which typically respond well to conservative treatment.

Symptoms

May Have No Symptoms

Many people with spondylolisthesis have no idea—it's found incidentally on imaging.

Common Symptoms

Low back pain (worse with extension, standing, walking)

Stiffness

Tight hamstrings (very common)

Muscle spasms

If Nerves Are Compressed

Pain radiating into legs

Numbness or tingling

Weakness

Symptoms worse with standing/walking, better sitting (neurogenic claudication)

In Adolescents

May present during growth spurt

Pain with sports, especially extension activities

Hamstring tightness

Diagnosis

X-rays

Standing flexion/extension views show slip

Oblique views show pars defect (in isthmic type)

First-line imaging

MRI

Shows soft tissue, discs, nerves

Evaluates nerve compression

Done if neurological symptoms or surgery considered

CT

Best for bone detail

Shows pars defect clearly

Used for surgical planning

Conservative Treatment

Most People Do Well Without Surgery

Grade I and II spondylolisthesis usually respond well to:

Activity modification

Physical therapy

Core stabilization

Time

Activity Modification

Avoid:

Repetitive extension (back bends)

Heavy lifting

High-impact activities (when symptomatic)

Prolonged standing

Encouraged:

Walking (within tolerance)

Swimming

Cycling

Low-impact exercise

Physical Therapy Goals

1. Core stabilization

2. Hip flexibility (especially flexors)

3. Hamstring flexibility

4. Lumbar spine stability, not mobility

5. Postural education

Exercises

Core Stabilization (Essential)

Dead bug:

Lie on back, knees bent 90°

Press low back into floor

Slowly lower opposite arm and leg

Maintain spine position

10 each side

Bird-dog:

Hands and knees

Extend opposite arm and leg

Keep spine neutral, don't arch

Hold 5 seconds

10 each side

Plank (modified if needed):

Forearms and toes (or knees)

Straight line from head to heels

Don't let back sag or arch

Hold 20-60 seconds

Side plank:

Forearm and feet (or knees)

Straight line from head to feet

Hold 20-30 seconds each side

Hip Flexor Stretching

Half-kneeling stretch:

One knee down, other foot forward

Tuck pelvis under (flatten low back)

Lean forward slightly

Hold 30 seconds

Critical for reducing lumbar extension stress

Hamstring Stretching

Supine hamstring stretch:

Lie on back

Use strap around foot

Straighten knee, keep back flat

Hold 30 seconds

Tight hamstrings increase stress on the lower back. Flexibility here is important.

Glute Strengthening

Bridges:

Lie on back, knees bent

Squeeze glutes, lift hips

Hold 5 seconds

15 reps

Clamshells:

Side-lying, knees bent

Lift top knee, keeping feet together

15 reps each side

What to Avoid

Lumbar extension exercises:

Prone press-ups

Cobras

Back bends

These can worsen slippage

Heavy spinal loading:

Heavy squats and deadlifts

Overhead pressing with heavy weight

Modify or avoid when symptomatic

Bracing

When Used

Adolescents with pars fracture (to allow healing)

Acute flare-ups

After activity

Types

Lumbosacral orthosis (LSO)

Anti-lordotic brace (prevents extension)

Duration

Variable, typically 3-6 months for healing in adolescents

Intermittent use in adults

When Surgery Is Considered

Indications

Progressive slip

Significant neurological deficit

Severe, disabling symptoms despite 3-6 months conservative treatment

High-grade slip (III-V)

Cauda equina syndrome (emergency)

Surgical Options

Decompression:

Removes pressure on nerves

Sometimes done alone for stenosis

Fusion:

Stabilizes the segment

Prevents further slipping

Often combined with decompression

Outcomes

Surgery effective for appropriate cases

Fusion rates high

Recovery 3-6 months

Living With Spondylolisthesis

Long-Term Management

Maintain core strength (lifelong)

Keep hips and hamstrings flexible

Avoid aggravating activities when symptomatic

Return to most activities when stable

What's Possible

Many people with spondylolisthesis:

Live active, pain-free lives

Participate in sports

Do physical jobs

The key is building stability and avoiding movements that stress the slip.

Spondylolisthesis sounds scary, but most cases are manageable. Low-grade slips usually do well with core strengthening and flexibility work. Avoid extension, build stability, stay active within your limits. Surgery is effective when needed, but most people never get there.

Spondylolisthesis: When One Vertebra Slips on Another