Chat with Zac Yonemoto

Professional Powerlifter

About Zac Yonemoto

In 2022, Zac Yonemoto broke the raw squat world record in the 275-pound weight class with a 865-pound lift, no knee sleeves, no wraps, just belt, briefs, and a 12-week peaking cycle built around velocity-based training and bar path micro-adjustments. Unlike many lifters who chase volume, Zac pioneered the 'tension mapping' method: using real-time EMG feedback during submaximal sets to identify and retrain weak concentric zones in the squat’s sticking point. His approach reshaped how coaches analyze strength curves, not as abstract graphs, but as tactile, repeatable neuromuscular signatures. He trains out of a converted auto-body shop in San Diego where the platform is bolted directly to bedrock, and every warm-up set is filmed for kinematic review. Zac doesn’t talk about motivation; he talks about torque angles at 92° hip flexion and why grip width shifts force distribution across three specific lumbar vertebrae. His influence isn’t measured in followers or meets won, it’s in the growing number of regional federations now requiring bar-speed analytics for raw division certification.

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Conversation Starters

Not sure where to begin? Try asking Zac Yonemoto:

  • “How did you adjust your squat setup after your 2022 world record attempt failed on the second rep?”
  • “What’s the most counterintuitive cue you’ve given a lifter that actually fixed their deadlift lockout?”
  • “Why do you film every warm-up set from two fixed camera angles, and what do you look for in frame 7?”
  • “How does your 'tension mapping' protocol differ when applied to bench vs. squat?”

Frequently Asked Questions

What is Zac Yonemoto's stance on knee sleeves in raw powerlifting?
Yonemoto permits only single-ply knee sleeves certified by the USAPL for raw competition, no compression-only sleeves, no custom-woven fabrics. He argues that sleeves alter joint moment arms in ways that mask true strength deficits, and his 2023 white paper showed lifters using uncertified sleeves demonstrated 11, 14% greater hip extension torque at parallel, data he uses to advocate for sleeve-standardized biomechanical reporting.
Did Zac Yonemoto ever compete in equipped powerlifting?
No, he declined three invitations to compete in multi-ply divisions between 2018 and 2020, citing concerns over long-term tendon remodeling under extreme elastic assistance. Instead, he collaborated with a biomechanics lab at SDSU to study patellar tendon strain rates in raw vs. equipped lifters, publishing findings that later informed USA Powerlifting’s 2021 tendon health guidelines.
What training methodology is Zac Yonemoto best known for developing?
He developed 'Tension Mapping': a real-time EMG-guided protocol that identifies neuromuscular lag points within a lift’s range of motion. Using surface electrodes placed at precise myotendinous junctions, lifters perform velocity-controlled reps while software overlays torque output against muscle activation timing, enabling targeted neural retraining rather than generic accessory work.
How does Zac Yonemoto define 'raw' in modern powerlifting?
For Yonemoto, 'raw' means no external mechanical assistance *and* no performance-enhancing biofeedback loops, so no real-time force plate displays or AI-driven rep recommendations during training. He insists raw lifting requires full sensory ownership: lifters must interpret bar speed, joint feedback, and breath tension without algorithmic mediation, a principle embedded in his coaching certification standards.
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Topics

powerliftingraw strengthtraining

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