Lower Back Pain on Both Sides: Causes and Exercises for Relief

Back pain that affects both sides of your lower back—rather than one side—often points to different causes than one-sided pain. Understanding what's creating your symmetrical discomfort helps you find the right treatment approach.

What Causes Pain on Both Sides?

Muscle-Related Causes

Paraspinal muscle strain: The muscles running along both sides of your spine can strain together from:

• Heavy lifting
• Prolonged poor posture
• Overuse from exercise
• Sleeping position

Widespread muscle tension: Stress and anxiety cause bilateral muscle tightening across the lower back.

Muscle imbalance: Weak core muscles force the back muscles on both sides to overwork.

Structural Causes

Disc issues: Central disc bulges or herniations can cause bilateral symptoms, though one side is often worse.

Degenerative disc disease: Age-related disc changes affect the spine centrally, causing diffuse discomfort.

Spinal stenosis: Narrowing of the spinal canal creates central or bilateral symptoms, often worse with standing and walking.

Facet joint arthritis: Affects joints on both sides of the spine, especially in older adults.

Spondylolisthesis: When a vertebra slips forward, it can cause bilateral symptoms.

Sacroiliac (SI) Joint Dysfunction

The SI joints connect your spine to your pelvis on both sides. When both joints are affected—which can happen with:

• Pregnancy and postpartum
• Leg length discrepancy
• Hypermobility
• Inflammatory conditions

You may experience pain across the lower back and into both buttocks.

Inflammatory Conditions

Ankylosing spondylitis: An inflammatory arthritis that primarily affects the spine, causing bilateral lower back stiffness and pain, especially in the morning.

Other inflammatory arthritis: Psoriatic arthritis and reactive arthritis can affect the spine symmetrically.

Key signs: Morning stiffness lasting more than 30 minutes, improvement with movement, symptoms that started gradually before age 40.

Other Causes

Kidney problems: Kidney infections or stones can cause bilateral flank/back pain, though usually higher than the lower back.

Abdominal issues: Some abdominal conditions refer pain to the back.

Fibromyalgia: Widespread pain condition that often includes bilateral back pain.

How Bilateral Pain Differs from One-Sided Pain

One-sided pain often suggests:

• Localized muscle strain
• Nerve root compression on one side
• SI joint dysfunction on one side
• Facet joint irritation on one side

Bilateral pain often suggests:

• Central disc issue
• Widespread muscle tension
• Spinal stenosis
• Degenerative changes
• Inflammatory condition
• Postural causes

This isn't absolute—there's overlap—but the pattern provides clues about the source.

Exercises for Bilateral Lower Back Pain

These exercises address the common causes of symmetrical back pain.

Gentle Mobility

Pelvic tilts: Lie on back with knees bent. Flatten lower back to floor, hold 5 seconds, then arch slightly. 15-20 repetitions. Mobilizes the lower spine.

Knee rocks: Lie on back with knees bent. Gently rock knees side to side, keeping shoulders down. 20-30 repetitions. Releases lower back tension.

Cat-cow: On hands and knees, alternate between arching and rounding spine. 15-20 repetitions. Full spine mobility.

Stretching

Double knee-to-chest: Lie on back, pull both knees toward chest, hold 30-45 seconds. Stretches entire lower back.

Child's pose: Sit back toward heels, arms extended forward. Hold 45-60 seconds. Decompresses lower back.

Lower trunk rotation: Lie on back, knees bent, let both knees fall to one side. 30 seconds each side. Stretches rotators.

Hip flexor stretch: Kneel on one knee, push hips forward. 30 seconds each side. Tight hip flexors contribute to bilateral back pain.

Figure-4 stretch: Lie on back, cross one ankle over opposite knee, pull toward chest. 30 seconds each side. Releases glutes and piriformis.

Core Strengthening

A strong core supports the spine from all sides.

Dead bug: Lie on back, arms up, knees bent 90°. Lower opposite arm and leg while keeping back flat. 10 each side.

Bird dog: On hands and knees, extend opposite arm and leg, keep back flat. 10 each side.

Glute bridge: Lie on back, knees bent, lift hips squeezing glutes. Hold 3 seconds. 15-20 reps.

Plank: Forearms and toes (or knees), hold body straight. 20-45 seconds.

Side plank: On forearm and feet (or knees), lift hips. 20 seconds each side.

Symmetrical Strengthening

For bilateral issues, symmetrical exercises help restore balance:

Superman: Lie face down, lift arms and legs together. Hold 3-5 seconds. 10-15 reps.

Back extension: On floor or machine, lift upper body. Controlled movement. 10-15 reps.

Wall sit: Back against wall, slide down to seated position. Hold 30-60 seconds.

Bodyweight squat: Partial depth, weight in heels. 15-20 reps.

Specific Protocols

For Muscle Tension/Strain

Focus on: Stretching, heat therapy, movement

Daily routine:

• Knee-to-chest and child's pose: Morning and evening
• Heat application: 15-20 minutes as needed
• Walking: 15-30 minutes
• Core exercises: 3-4x per week

For Disc-Related Pain

Focus on: Extension exercises (often), core stability

Key exercises:

• Prone press-ups: Lying face down, press upper body up, hips stay down
• Walking: Promotes disc health
• Core stability work
• Avoid prolonged sitting and flexion

For SI Joint Dysfunction

Focus on: Stability and symmetry

Key exercises:

• Glute bridges (both sides equally)
• Clamshells (both sides)
• Single-leg balance work
• Pelvic stability exercises
• Avoid asymmetrical loading

For Spinal Stenosis

Focus on: Flexion-based exercises (opening the spinal canal)

Key exercises:

• Knee-to-chest stretches
• Child's pose
• Cycling (flexed position is comfortable)
• Walking with support if needed
• Avoid prolonged standing and extension

For Inflammatory Conditions

Focus on: Daily movement, flexibility, medical management

Key exercises:

• Daily stretching and mobility
• Swimming or water exercise
• Regular low-impact cardio
• Avoid prolonged static positions

Note: Inflammatory conditions require medical diagnosis and treatment alongside exercise.

Creating Your Routine

Basic Daily Routine (10-15 minutes)

Morning:

• Pelvic tilts: 15 reps
• Knee-to-chest: 30 seconds each side
• Cat-cow: 10 reps
• Walking: 10 minutes

Evening:

• Hip flexor stretch: 30 seconds each side
• Figure-4 stretch: 30 seconds each side
• Child's pose: 45 seconds
• Lower trunk rotation: 30 seconds each side

Strengthening (3-4x per week, add to daily routine)

• Dead bug: 3 x 10 each side
• Bird dog: 3 x 10 each side
• Glute bridge: 3 x 15
• Plank: 3 x 30 seconds
• Side plank: 3 x 20 seconds each side

When to See a Doctor

Bilateral lower back pain warrants medical evaluation if:

• Pain persists beyond 4-6 weeks of self-care
• You have morning stiffness lasting more than 30 minutes (may indicate inflammatory condition)
• Pain is accompanied by leg numbness, tingling, or weakness on both sides
• You have difficulty walking or standing
• Symptoms are progressive
• You have fever, unexplained weight loss, or other systemic symptoms
• You have a history of cancer
• Pain started after age 50 without prior history

Bilateral symptoms, especially with prolonged morning stiffness, can indicate inflammatory conditions that benefit from early diagnosis and treatment.

Prevention

Symmetrical exercise: Balance your workouts—don't always favor one side.

Core strength: A strong core supports both sides of your spine.

Posture awareness: Avoid asymmetrical positions (crossing same leg, carrying bag on same shoulder).

Regular movement: Don't stay in any position too long.

Flexibility maintenance: Keep hips, back, and hamstrings flexible.

Stress management: Reduces bilateral muscle tension.

The Bottom Line

Lower back pain on both sides often indicates central spinal issues, widespread muscle tension, or conditions that affect the spine symmetrically. The good news: most causes respond well to appropriate exercise, including mobility work, stretching, and core strengthening.

Pay attention to your specific pattern—what makes it better or worse—and match your exercises accordingly. Flexion-preferring conditions need different approaches than extension-preferring ones.

If your bilateral pain is accompanied by significant morning stiffness, doesn't improve with exercise, or is getting progressively worse, see a healthcare provider to rule out inflammatory conditions or other issues that need specific treatment.

With consistent attention to mobility, strength, and posture, most bilateral lower back pain improves significantly within weeks.