Key Moments
287 ‒ Lower back pain: causes, treatment, and prevention of lower back injuries and pain
Key Moments
Lower back pain expert Stuart McGill discusses causes, anatomy, mechanisms, and personalized treatments for back pain.
Key Insights
Lower back pain stems from specific biomechanical mechanisms, not just 'non-specific' pain.
Spinal anatomy, including discs and facet joints, explains vulnerability to injury under specific loads.
Injuries like disc bulges and nerve impingement have identifiable causes and can often be managed without surgery.
Personalized assessment is crucial for determining effective treatment, distinguishing between pain triggers and general weakness.
Strength, stability, and movement skill are essential for spinal health and injury prevention, not just general fitness.
Psychological factors significantly interplay with physical pain, and understanding the pain mechanism empowers patients.
THE ANATOMY AND BIOMECHANICS OF THE SPINE
The human spine, while a marvel of engineering, has inherent design trade-offs. It's a flexible rod composed of vertebrae separated by discs, allowing movement but also susceptible to injury. The discs, made of collagen fibers surrounding a gel-like nucleus, provide stiffness but can delaminate under simultaneous excessive load and motion. Unlike ball-and-socket joints in hips and shoulders, spinal joints are guided by facet joints, which can wear down if the discs lose their stabilizing function. This intricate structure is why specific movements and stresses can lead to localized pain, particularly in the L4-L5 and L5-S1 areas.
MECHANISMS OF LOW BACK PAIN
Lower back pain often arises from specific mechanical insults rather than being a generalized condition. Peter Attia's personal history illustrates this, detailing acute episodes resulting from disc bulges where a fragment impinged on a nerve root. Dr. McGill explains that a 'free fragment' from a disc can cause severe, acute pain by irritating nerve roots. This is often triggered by specific postures or movements that exacerbate the disc bulge. The pain mechanism can involve direct disc innervation or protective muscle guarding, and understanding this is key to effective treatment.
STRESS VS. STRAIN AND MOVEMENT PATTERNS
Understanding the difference between applied load and deformation, or 'strain,' is crucial. Tissues, including spinal structures, fail at a certain deformation level. The spine's curvature and the shape of the discs contribute to stress concentration, particularly in the lower lumbar regions. Bending stresses are greatest where the spine is thickest. When individuals adapt their spines through intense training like powerlifting or extreme flexibility training like yoga, they alter the collagen structure of their discs. This adaptation dictates how the disc responds to load, potentially leading to posterior bulges during flexion (powerlifters) or anterior bulges during extension (yoga practitioners).
FACET JOINTS AND SPINAL INSTABILITY
Facet joints, located at the back of the spine, guide motion and provide stability. When a disc loses height or stiffness, the facet joints at that level take on more load, potentially becoming irritated and inflamed, leading to a different type of pain – often a slower, aching sensation. This increased workload on the facet joints is a direct consequence of disc degeneration, a cascade often initiated by repeated micro-trauma. Instability, characterized by unwanted shearing motion between vertebrae, further stresses these joints and can contribute to chronic pain if not addressed.
THE 'BIG THREE' EXERCISES AND STABILITY
Dr. McGill's 'Big Three' exercises—modified curl-up, side plank, and bird-dog—are designed to build proximal stiffness and core stability without further stressing a sensitive spine. These exercises are not universal cures but are prescribed based on individual assessment. The goal is to create torso stiffness, enabling efficient force transmission and preventing energy leaks during movement. By engaging specific core muscles and promoting bracing, these exercises enhance resilience and performance, acting as a foundation for spinal health rather than just a treatment for existing pain.
PSYCHOLOGICAL IMPACT AND THE MECHANISM OF HEALING
The psychological toll of chronic back pain is immense, often leading patients to feel invalidated or 'crazy' when told their pain is 'in their head.' Dr. McGill emphasizes that understanding the precise mechanical mechanism of pain is empowering. By demonstrating how specific movements trigger or alleviate pain, patients can regain confidence. The 'virtual surgery' concept and personalized strategies aim to desensitize pain pathways and retune the body, showing that with the right approach, many who are told they need surgery can avoid it. This approach highlights the crucial interplay between the mind and body in healing.
SURGICAL INDICATIONS AND CONTRARIAN APPROACHES
While surgery can be necessary for severe stenosis, significant instability, or specific red flags, Dr. McGill advocates for a thorough mechanical assessment before considering it. Many patients who are told they need surgery can often avoid it with targeted exercises and movement strategies. He highlights that excellent surgeons are often those who are happy to *not* operate. Conditions like nerve root impingement, sciatica, or even some types of spondylolisthesis may be managed non-surgically by identifying and altering the specific movement patterns that provoke symptoms.
LONGEVITY, STRENGTH, AND SUFFICIENCY
True health and longevity involve more than just avoiding injury; it's about maintaining functional capacity. Dr. McGill critiques extreme approaches like 'deadlift till you drop' or complete inactivity, advocating instead for 'sufficient' strength, mobility, and endurance. Grip strength and VO2 max are presented as powerful biomarkers for longevity, integrating years of work and promoting whole-body stability. The emphasis shifts from maximal effort to sustainable movement patterns that preserve joints and enable a higher quality of life, allowing individuals to engage with their families and activities as they age.
ADVICE FOR PREVENTION AND RECOGNIZING PAIN TRIGGERS
For those yet to experience significant back pain, the advice is to build a robust foundation early. This includes understanding personal pain triggers through self-assessment, much like described in Dr. McGill's book 'Back Mechanic.' Simple actions like avoiding prolonged sitting, incorporating strategic movement breaks, and practicing core stability exercises can prevent future issues. The key takeaway is that back pain is not random; it has causes and can often be managed by learning the unique mechanical vulnerabilities of one's own spine and adopting behaviors that mitigate them.
Mentioned in This Episode
●Tools
●Companies
●Organizations
●Books
●Concepts
●People Referenced
Common Questions
Acute pain often results from repeated insults or specific disc injuries. If these insults are stopped, the pain may resolve, making it seem like chronic pain was just many acute episodes. True chronic pain is often unremitting, possibly due to brain changes or trauma, and doesn't always have a strong mechanical trigger.
Topics
Mentioned in this video
A training science technique used for building endurance through repeated short exposures, applied to the McGill Big 3 exercises.
Iconic boxer whose unique footwork and thrust lines are discussed in the context of power generation.
Another statin medication mentioned by Stuart McGill as something his doctor considered prescribing.
A book written by Stuart McGill for the general public, designed to help individuals understand their back pain and perform self-assessments.
Stuart McGill's organization through which he trains clinicians and offers resources for back pain assessment and management.
A book mentioned by Stuart McGill, written by Professor Caldi Willis, discussing the process of back pain progression.
Peter Attia's concept, admired by Stuart McGill, focusing on achieving a broad range of physical capabilities at older ages.
Guest expert on spinal biomechanics, discussing causes, treatments, and prevention of lower back pain.
An exercise mentioned as potentially being a pain trigger for individuals with certain back issues.
A famous powerlifter mentioned by Stuart McGill to illustrate the demands of setting personal bests and the need for recovery.
Stuart McGill's 50-hour online course with a 3-day in-person component for clinicians to learn advanced back pain assessment.
A statin medication mentioned by Stuart McGill as something his doctor considered prescribing for his cholesterol.
Famous Canadian spine surgeon who wrote a book on managing low back pain, describing the progression of pain.
Three core exercises (modified curl-up, side plank, bird-dog) recommended by Stuart McGill for building core stability and sparing the spine.
The company that manufactures the biofidelic spine models used by Stuart McGill for demonstration.
National Hockey League, whose players' spine health and injuries were studied by Stuart McGill, and specific NHL players were aided by McGill's methods.
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