Dr. Stuart McGill: Distinguished professor emeritus of spine biomechanics at the University of Waterloo with 250+ peer-reviewed papers and three decades analyzing injured and healthy spines. Author of 'Back Mechanic' and a leading authority on the causes and rehabilitation of back pain.
What this episode covers
Huberman and McGill dig into the anatomy and physiology of the spine and why there is no single cause or single cure for back pain. McGill frames back pain as a symptom with a hundred-plus pathways, shaped by genetics (spine and disc shape), exposure/load, and the psychosocial state of the person. He walks through his detailed provocative-testing assessment, explains why athletes are genetically suited to certain sports, and argues injuries are dangerously asymmetric so training should protect the joints, not just build muscle. The conversation covers deadlifts and squats, the McGill 'big three,' the 'biblical training week,' walking dosage, disc herniation mechanics, and distal-limb/neck training for long-term resilience.
Recommended on this episode
The Lost Art of Running
Shane Benzie
“a wonderful book to read is the the Lost Art of running but by Shane benzy who studied the Kenyon Runners and how they store and recover elastic energy”— Stuart McGill
The guest's own work
Low Back Disorders
Stuart McGill
“he quotes our work he quotes my low back disorders book as an example of antifragile medicine”— Stuart McGill
Back Mechanic
Stuart McGill
“one one chapter in my back mechanic book it's called well it's about surgery and should you have surgery”— Stuart McGill
Gift of Injury (Brian Carroll book)
Stuart McGill and Brian Carroll
“I've had the current holder of the world's alltime record squat Brian Carroll and I Brian and I have written a book together so I can use his name”— Stuart McGill
Also referenced (named, not recommended)
Antifragile
Nassim Nicholas Taleb
“do you know the book by TB Nasim oh Nim TB Nim an antifragile yeah... he quotes my low back disorders book as an example of antifragile medicine”— Stuart McGill
Heavy Hands
Leonard Schwartz
“I love older exercise books and recently I came across one called heavy hands this must be from the 70s”— Andrew Huberman
Big reveals from this episode
- McGill's core thesis: 'genetics loads the gun, exposure pulls the trigger,' and psychosocial milieu shapes the pain response.
- Says pain corrupted world-record squatter Brian Carroll so badly McGill had to teach him how to get off the toilet and re-learn how to squat.
- Describes 'virtual surgery', faking a post-surgical recovery, with a 95% two-year satisfaction rate in patients who avoided real surgery.
- Reveals that half of his under-30 deadlift clients say their back pain 'started with a deadlift,' calling it an epidemic.
- More than half of harvested disc nuclei in surgery contain broken endplate fragments, evidence of compression overload, not just bending.
- Claims pro golfers who took up heavy Olympic lifting hit the ball farther but wrecked their knees and discs, and got better after backing off.
- Admits he fractured his spine two years ago hitting a rock at 100 mph on a snowmobile and gave up the sport.
- Reframes the deadlift debate: it's not the lift's fault but the progression, bone takes far longer than six months to adapt.
Worth remembering
- A thin willowy spine tolerates many bending cycles (e.g., the sit-up world record holder) while a thick spine bears compression but fails in bending.
- We evolved discs instead of ball-and-socket spinal joints because controlling stacked vertebrae with sockets would be 'mission impossible.'
- A disc is roughly 80% stiff type-1 collagen and 20% elastic collagen, with types 3-10 binding fibers, the main site of genetic variability.
- 100-meter sprinters have far more lordosis (lower-back arch) than distance runners, which boosts extensor power behind the center of mass.
- Injury is economically asymmetric, losing 50 hurts more than gaining 50 feels good, so avoiding injury beats chasing marginal gains.
- For back pain, three 20-minute walks beat one 60-minute walk; dosing under the 'tipping point' guarantees pain-free movement.
- Hanging and inversion increase disc height for only about 15 minutes before hydrostatic pressure pushes the fluid back out.
- McGill swears by PRP for stubborn muscle tears and some joints, but has seen no evidence it helps spinal discs.
- Calf muscle wasting is a reliable visible marker of upper-motor-neuron degeneration, often readable without an EMG.
- McGill's own genetic athletic panel rated him 'ultra' for grip strength and short-burst speed but worst-category for heart-rate recovery.