Dr. Stefi Cohen — 25 World Records, Power Training, and More | The Tim Ferriss Show

Tim Ferriss interviews powerlifter and physical therapist Stefi Cohen, who grew up in Venezuela before moving to the US at 17 on a soccer scholarship. They cover what separates elite deadlifters (genetics, leverages, and programming), her competition training blocks, and her evidence-based, anti-mechanistic view of back pain and injury. Cohen explains that pain is not a reliable sign of tissue damage, that most back pain has no discernible cause, and walks through a practical six-step protocol for dealing with any injury. The conversation also explores visualization (including rehearsing negative outcomes), sports psychology after bombing out of a meet, her near-dismissal from PT school, and her philosophy that strategic quitting and finding the balance of skills, talents, and passions beats 'do what you love.'

• Cohen was the first woman to deadlift four times her body weight, pulling over 500 pounds at 120-pound body weight, then beating it with a 545-pound deadlift.
  00:15:09
• She describes a Roger-Bannister-style phenomenon: as soon as she proved a 500-pound deadlift was humanly possible, several other women suddenly achieved the same mark.
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• Cohen states there is no discernible cause for back pain in 95-99 percent of cases, yet it remains the leading cause of disability worldwide.
  00:52:00
• Pain is not a reliable sign of damage; 37 percent of 20-year-olds have asymptomatic disc degeneration, rising to 84-94 percent in people over 80, framed as 'wrinkles on the inside.'
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• After bombing out of a meet, she worked with a sports psychologist and began visualizing negative outcomes, rehearsing how to react when a lift fails on the platform.
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• Cohen was kicked out of her top-10 PT program for scoring a 74 on a single test and had to appeal before a round table of 15-20 professors to be reinstated.
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• She delivers a six-step protocol for any injury: stop doing what hurts, use isometrics for positive movement, increase aerobic activity, use pain as a stoplight guide, turn off the pain alarm, and respect that tissue adaptation takes time.
  02:04:06

• Cohen was born in Caracas, Venezuela, a Venezuelan Jew who played for the national soccer team on dirt fields at a military base before leaving the country at 17.
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• She has broken roughly 25 world records in powerlifting across three weight classes, cutting from 135 pounds down to 114 pounds.
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• Her other personal bests include a 510-pound squat and a 240-pound bench, both at 120-pound body weight.
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• She trained Bulgarian-style Olympic weightlifting using daily maxes for about four years before developing her own middle-ground philosophy.
  00:32:11
• Tim and Stefi discuss the replication crisis, noting studies frequently show that research results are often incorrect or non-generalizable.
  00:53:30
• Ferriss describes how five intravenous ketamine infusions unexpectedly eliminated his chronic mid-back pain for over a year and a half.
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• Cohen critiques the McGill Big Three (bird dog, dead bug, side plank), saying they reduce pain via positive movement and exercise-induced analgesia, not by improving stability.
  01:15:50
• She frames career and skill discovery as balancing three components: skills, talents, and passions, arguing 'do what you love' is among the worst advice.
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• She cites the sunk cost fallacy from Seth Godin's 'The Dip' as a reason people stay in jobs, sports, or relationships they should quit.
  01:45:21
• During the pandemic, after a severe back flare-up and depression, she bought a heavy bag, which led coach Kareem to recruit her toward becoming a pro fighter.
  02:01:28