Peter Attia MD264 ‒ Hip, knee, ankle, and foot: common injuries, prevention, and treatment options
At a glance
WHAT IT’S REALLY ABOUT
Orthopedic surgeon explains lower-body injuries, prevention, biologics, surgery and choosing a surgeon
- Cohen explains that many hip problems, including arthritis in young adults, trace back to how the socket formed early in life (developmental dysplasia) or to bony bumps causing impingement, and that stress fractures of the femoral neck must be ruled out in endurance athletes with groin pain.
- Both speakers stress strengthening the hip abductors, hip flexors and adductors, plus neuromuscular training, as the best-supported way to reduce hip, knee, ACL and fall-related injuries.
- Cohen says PRP shows its best evidence for knee arthritis, tennis elbow and gluteus medius tears, that true stem cell therapies are not available for these uses, and that biologics currently reduce symptoms rather than modify disease.
- For the knee, Cohen covers how ACL tears happen and are reconstructed, why half of ACL-injured knees show arthritis within 15 to 20 years, when to repair or leave meniscus tears, and when knee replacement is appropriate compared with hip replacement.
- The discussion closes with Achilles problems, ankle sprains, fifth metatarsal and other foot fractures, bunions, and advice on judging a surgeon by listening, explaining alternatives and discussing complications and next steps.
IDEAS WORTH REMEMBERING
5 ideasArthritis can start in infancy and appear without warning.
Cohen says a socket that doesn't form properly causes edge loading and eventual arthritis, which is why ultrasound screening and bracing like the Pavlik harness matter. He has seen patients in their late 20s who learn they have arthritis on an X-ray.
Groin pain in a runner needs a stress fracture ruled out.
Femoral neck stress fractures, especially on the tension side, can displace and cut off blood supply to the femoral head, leading to avascular necrosis and hip replacement. MRI is the gold standard for detecting them.
Strong hip abductors and flexors are protective across the lower body.
Cohen would pick the gluteus medius group as the one to train from the early teens, tying it to hip, knee, ACL and fracture risk. He cites a study showing smaller psoas volume in elderly hip fracture patients.
Biologics currently reduce symptoms rather than rebuild tissue.
Cohen says PRP has the best evidence in knee arthritis, tennis elbow and gluteus medius tears, and that injected products marketed as stem cells are not actually stem cells. Trials are hampered by unknown platelet dose and quality, which is why registries are being built.
Mechanical alignment and activity both shape knee health.
Cohen describes an inverted U-shaped activity curve, notes that inactivity harms cartilage, and says a line from hip center to ankle center passing through the knee center predicts good outcomes. Misalignment, meniscus loss and ACL instability overload cartilage.
WORDS WORTH SAVING
5 quotesThe coefficient of friction of cartilage is so smooth, it's smoother than ice on ice. There's no man-made substance. I mean, it's smoother than Teflon.
— Adam Cohen
If I had any muscle that needed to be worked on, and I had to pick one muscle group, it would be that muscle group, starting from early teens.
— Adam Cohen
Nobody wanted to trip on the sidewalk, but what happens when you trip? Are you able to recover quickly, or do you end up with an injury?
— Adam Cohen
I know you didn't know you have arthritis, but now you do.
— Adam Cohen
If you feel like you're being rushed, you probably are being rushed.
— Adam Cohen
High quality AI-generated summary created from speaker-labeled transcript.
