Tool·Lifes /Everything About Rehab
Apps
Explore Search
🦴 Spine & core

🔙Lower Back

The lumbar spine bears more compressive load than any other spinal region, making low back pain the single most common musculoskeletal complaint worldwide.

Also called: Lumbar Spine · Low Back

OverviewAnatomyConditionsAssessmentExercisesProgressionPrecautionsRecovery

Reviewed 2026-08·Sources & research·Media credits

Illustration of the lumbar spine and lower back musculature
Anatomography · CC BY-SA 2.1 jp

Quick facts

5 (L1–L5)Vertebrae
Most adults experience an episodeLifetime prevalence
Muscular strain, disc irritation, deconditioningCommon cause
4–6 weeks for acute non-specific painTypical recovery
Erector spinae, multifidus, glutealsKey muscles
Saddle numbness, leg weakness, bladder changeRed-flag signs

The lower back, or lumbar spine, consists of five large vertebrae that support most of the body's weight while allowing bending, twisting, and lifting. Because it sits at the junction between the mobile spine above and the relatively fixed pelvis below, the region absorbs substantial mechanical stress during everyday movement.

Low back pain is one of the leading causes of disability and missed work globally, with the World Health Organization identifying it as a top contributor to years lived with disability. The large majority of cases are classified as non-specific, meaning no single structural abnormality fully explains the pain, and most episodes improve within weeks with continued activity.

A minority of cases involve identifiable causes such as disc herniation, spinal stenosis, or spondylolisthesis, and a very small proportion present with red-flag features suggesting infection, fracture, or cauda equina syndrome that require urgent medical attention. This page covers the region's anatomy, common conditions, assessment approaches, and general rehabilitation patterns.

The profile

804050556075
  • Pain frequency80
  • Recovery length40
  • Exercise load50
  • Clinician need55
  • Self-care fit60
  • Recurrence risk75

Clinician need

55 / 100

The lumbar spine bears more compressive load than any other spinal region, making low back pain the single most common musculoskeletal complaint worldwide.

Seven ways into this topic

01

Anatomy

How the lumbar vertebrae, discs, and surrounding muscles support the trunk, and the typical range of motion for the low back.

Read →

 02

Conditions

An overview of frequently diagnosed lower back conditions, their relative severity, and how often each is seen in clinical practice.

Read →

 03

Assessment

How clinicians examine the lumbar spine, including common orthopedic tests and warning signs that warrant urgent care.

Read →

 04

Exercises

Commonly used exercises for the lumbar spine, covering gentle mobility, core stabilization, and progressive strengthening.

Read →

 05

Progression

A typical four-phase progression for lumbar spine rehabilitation, from symptom control to full functional loading.

Read →

 06

Precautions

Common precautions and warning signs to be aware of while recovering from low back pain or injury.

Read →

 07

Recovery

A general timeline for recovery from common low back conditions and the criteria clinicians use to judge readiness to return to full activity.

Read →

Frequently asked questions

How common is low back pain?
Population studies suggest that a large majority of adults will experience at least one episode of low back pain during their lifetime, making it one of the most frequent reasons for clinic visits.
Is bed rest recommended for low back pain?
Current guidelines, including those from the American College of Physicians, generally advise against prolonged bed rest and instead recommend staying as active as tolerated.
Does a disc herniation always require surgery?
Most disc herniations improve with conservative management such as exercise and time; surgery is typically reserved for cases with significant, persistent nerve compression or red-flag features.
What is sciatica?
Sciatica describes pain radiating along the sciatic nerve path into the buttock and leg, usually caused by irritation of a lumbar nerve root rather than the sciatic nerve itself being diseased.
Can core exercises prevent low back pain?
Trunk and hip strengthening is commonly recommended to support the lumbar spine, though research suggests general physical activity and load management play a comparably important role in prevention.
Why does low back pain recur so often?
Recurrence is common because contributing factors such as deconditioning, prolonged sitting, or heavy lifting mechanics often persist after the initial episode resolves.
Is imaging needed for every case of back pain?
Guidelines generally reserve early imaging for cases with red-flag features or that fail to improve after a period of conservative care, since imaging findings often do not correlate well with pain.
What is spondylolisthesis?
Spondylolisthesis is a forward slip of one vertebra relative to the one below it, which can be present without symptoms or can contribute to pain and nerve irritation depending on severity.

Sources & research

  1. Noninvasive treatments for acute, subacute, and chronic low back painQaseem A; et al. · 2017 · Annals of Internal MedicineDOIPubMed
  2. What low back pain is and why we need to pay attentionHartvigsen J; et al. · 2018 · The LancetDOIPubMed

Media credits

More in Spine & core

Neck

The seven cervical vertebrae and the soft tissues that carry the head — posture load, disc and facet pain, and graded mobility work.

Pain frequency 82

Core

The core is the coordinated group of trunk muscles that stabilizes the spine and pelvis, transferring force between the upper and lower body during nearly every movement.

Pain frequency 35