The performance system for the future.

Training, supplements, peptides, nutrition, and wearables, integrated under one operating model. SYSTEMM is the integration: one platform, one protocol, one home for the inputs that compound.

— 01 · Why

Why SYSTEMM exists.

The performance industry runs on fragmentation. A trainer for movement. A doctor for hormones. A nutritionist for diet. A wearable for data. Each one with its own protocol, its own dashboard, its own theory. Most people never integrate them. Even fewer reach the result they're paying for.

SYSTEMM is the integration. One operating model that spans training, supplementation, peptides, nutrition, and wearable data. Decisions stop being one-offs and start being part of a system that compounds.

— 02 · Method

How we think.

Mechanism first.

We don't sell outcomes. We explain how things work.

Data over dogma.

Bloodwork, CGM, sleep, HRV. Measurable inputs that direct decisions.

Compounding over heroics.

A protocol you follow for two years beats one you crush for two months.

Operator-grade.

Built for high-stakes people who can't afford guesswork.

— 03 · The Founders

● Founder

Mitchell McClellan

Founder

Mitchell's journey started in fitness. Full-time trainer at Equinox in under two months, top 100 globally in his first year. But the more he worked with serious professionals, the clearer it became: real performance isn't built in the gym. It's the integration of training, nutrition, recovery, hormones, and mindset that compounds.

He built that thesis in increasingly demanding environments. As in-house Performance Coach at Balyasny Asset Management, he used EEG brain monitoring with portfolio managers to refine high-stakes decision-making. He founded Mitchell McClellan Performance, then served as Director of Performance at Paine Schwartz Partners during the pandemic, traveling full-time with the firm's CEO. He built and ran THRONE, a biometrics-driven performance atelier in the West Village, with force-plate testing, 3D analysis, and a sports-science lab.

After a decade of building these systems one client and one facility at a time, SYSTEMM is what it always pointed at: the integration itself, at scale.

Dr. Pat Davidson

Chief Science Officer

Dr. Pat Davidson is one of the few people in the world who pairs a terminal degree in exercise physiology with elite-level performance experience in the trenches. He holds a Ph.D in Exercise Physiology and a Master's in Strength and Conditioning, and taught exercise science, strength and conditioning, and statistics as a professor at Brooklyn College and Springfield College.

Outside the classroom, Pat has competed at the highest levels of strength and combat sport. He has fought professionally in MMA, qualified twice for the World Strongman Championships, represented Team USA in Strongman at the Arnold Classic, and is now pursuing a career in bodybuilding with the goal of becoming an IFBB pro.

He is the author of three books, including A Coach's Guide to Optimizing Movement: Rethinking the Big Patterns, a foundational text for trainers, rehab professionals, and strength coaches. He co-hosts Strong Talk on Men's Health, and has educated thousands of the world's leading personal trainers, rehabilitation specialists, and competitive strength athletes.

Follow Pat on Instagram →

● The Protocol

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