Yousuli is a Greater Los Angeles endurance performance lab and coaching ecosystem. We use lab testing, on-road aero work, and technique analysis to turn your training into real speed, in the pool, on the bike, and on the run.
Lab-grade testing, real-world aero, technique work, and a community that doesn’t make beginners feel small.
Real training zones from real gas exchange. RMR for fueling and RED-S screening. Lab-grade accuracy in a portable mobile setup.
Field-based CdA testing for free speed. Position, helmet, tires, hydration setup, the changes that save 10–50 watts on race day.
Stroke mechanics, gait analysis, biomechanical fixes. Not vague advice, specific cues you can use when the coach isn’t there.
No “elite-only” barrier. Beginners and Kona-level athletes share the same space, with different plans but the same respect.
Three disciplines, three different limiters. Yousuli works across all of them, and on the connections between them.
Increase propulsive power with prescriptive drills and exercises. Pacing built from real metabolic data. Drills that actually translate to open water.
We test, prescribe training intensity, and minimize aerodynamic drag. The same effort, faster splits.
Running form, power, and physiological analysis. Plans built around your biomechanics, not someone else’s.
Because no two athletes are the same.
We offer a wide range of cutting-edge physiological, metabolic, and efficiency tests, from RMR / RED-S screening to VO₂, lactate, and SmO₂ profiling, plus performance tests for athletes and clubs. The goal is to assess strengths and limiters correctly, then empower athletes with the right tools to drive efficiency forward.
The heart of the community is in greater Los Angeles, but we coach athletes in Europe, the Middle East, and Asia. Welcome to all.
For triathlon and endurance sport. Plans built around your real biomechanics, your real life, and your real goals. Same standard whether you’re first-time finisher or chasing podiums.
Weekly open sessions in Walnut, CA, plus online squads, partner gym sessions, and event-specific blocks. Train alongside athletes who are working on the same things you are.
Reduced-rate spots for elite athletes targeting national or international performance, and para-athletes committed to training and racing, with help navigating grants and partner perks.
A club for ordinary humans doing unordinary things. Building toward 1,000 strong, committed to doing big things together.
The Yousuli Club is where the numbers meet real people. Group sessions, shared challenges, long-term projects, from first 70.3 to crossing a mountain range. Low-barrier membership, high-quality support, and a real community of athletes pulling in the same direction. Read the 1,000-strong mission →
Weekly sessions in Walnut, CA. Online squads for athletes elsewhere.
Pick the one that fits your level, from first 70.3 to crossing a mountain range.
Early picks on testing days, clinics, and partner discounts (Zoot trisuit, Slipstream, EO SwimBETTER, more).
Three things athletes mention in the first message they send.
You get clear training zones, pacing plans, and one-page summaries you can actually use. Numbers translated to next-step decisions, not data theatre.
Position, equipment, pacing, fueling, movement. The goal is always the same: more speed for the same cost. Add training load after the leaks are fixed.
Beginners and Kona-level athletes share the same space, with different plans but the same respect. The first 5 km matters as much as the third Kona qualification.
For the triathlon community at large, whether you become a Yousuli athlete or not.
Power-to-finish (course-based), VO2 → cycling/run/swim, race fueling, sweat rate, CdA estimate, Crr, gear ratios, tire pressure, RMR, critical power, RPE/RER, body comp from calipers, FIT-file compare, multisport-FIT splitter, and more.
Browse calculatorsVO₂max as a longevity vital sign, RMR as a RED-S front-door, the oxygen cascade limiter map, three ways to measure efficiency. Plain language, references included.
Read the scienceArticles, athlete case studies, podcast clips, and clinics for clubs, gyms, and groups. Practical material from the lab, not warmed-over generalities.
Visit the blog
I’ve spent decades in endurance, hundreds of marathons and ultras, 101 self-supported half-Iron distance days in a row, and more time in the pain cave than I care to admit. That experience, plus formal training in coaching, strength & conditioning, and testing, convinced me of one thing: most athletes work way harder than their results suggest. Yousuli exists to fix that gap between effort and outcome.
Certifications: USAT Level II · Ironman certified · TrainingPeaks · Strength & Conditioning · Sport nutrition · Behavior change. Based in Walnut, California, working with athletes worldwide.
Yousuli is building a community of 1,000 people committed to doing epic things, their version of epic, not ours. The first 5 km, the first 70.3, the Kona qualifier, crossing a mountain range. Whatever it is, we’d love to hear about your goals.
For partners and gym owners, testing days at your facility, you keep 30%. Partner program →
