A gym is a room. THRONE was a thesis about what belongs in the room.
The people chasing peak performance had no place that integrated everything they actually need under one roof, coaching, medicine, recovery, imaging, the compounds, the protocols, and the judgment about what to take and when. Everyone else was selling a slice. THRONE put the whole stack on one membership.
Two floors inside a landmarked building on Greenwich Street. Members applied. The roster stayed small. The price was the price of the operation, not a markup. What it proved is that integration at room scale outperformed à la carte at city scale, and that the people who could afford to stitch their own program together stopped trying once they didn't have to.
What it couldn't do at one location was scale. Two floors. One zip code. A waitlist. That gap is what SYSTEMM is built to close.
SYSTEMM is a publication, a clinic, and an application, all running on one protocol.
The publication is live now: The Protocol newsletter monthly, a glossary of 275 terms, eleven structured protocols, seven calculators. It's where the operator who self-experiments goes to read the version of the answer that has its mechanism documented and its sources named. It's also how a member finds us, eighteen months before they walk into the building.
The clinic opens in NYC Midtown, 5,000 square feet across two floors, tech-instrumented training machines, physician-led intake, peptide and hormone protocols sequenced to the member's training rather than sold separately from it. Two hundred founding members at $4–6k per month covers all-access training and the protocol team; compounds are billed through the on-site clinic at pass-through. The voice you read in the publication is the voice you'll hear in the consult.
Year 3 opens the second location, Downtown Manhattan or South Florida, depending on demand, and the digital training application launches alongside or before, depending on the speed of capital. The five-year shape is monthly digital subscriptions where training, supplements, and peptides are aligned to a defined outcome: in-person membership for the highest tier, scaled digital education and product for everyone else. Same protocol team. Same instrumentation. Same trust.
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 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.
Every chapter of my career has pointed at the same thing, the gap between training and medicine, the gap between data and discipline, the gap between what the world's most ambitious people are told to do and what actually compounds.
THRONE was the first attempt at closing it. Seven thousand square feet at 666 Greenwich. Force-plate testing, 3D analysis, sports-science lab. The room you see in the photos above is the room we built. It taught me what the integration looks like at room scale.
SYSTEMM is the integration at category scale. Clinic, publication, application. The same thesis, run as a system rather than a single room. Three revenue streams that compound, one operating standard that holds.
The materials in this vault are not a pitch. They are what I would send to a colleague. The model is live. The room was real. The next room opens in 2026.