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Meet Dominick, your Muscle System Specialist.

I help women 40+ with real joint history build strength and confidence they can keep for life.

Dominick Nusdeu, Certified Muscle System Specialist

The Specialist

Dominick Nusdeu

Certified Muscle System Specialist • Resistance Training Specialist • 4th-Degree Brazilian Jiu Jitsu Black Belt

"I've spent years working with women 40+ whose joints kept fighting every workout they tried. Most of them weren't lazy. They were scared — of their knees, hips, back, or shoulders blowing up again.

I became a Certified Muscle System Specialist (MSS) so I could understand how the muscular system, joints, and nervous system interact, and build plans that respect that.

Theorem isn't a bootcamp or a big-box gym. It's a Strength & Longevity Lab for women 40+ with joint issues who want to stay strong, independent, and active for the next 10–20 years, not just survive the next challenge."

Credentials

  • Certified Muscle System Specialist
  • BS in Exercise Science / Nutrition
  • Resistance Training Specialist
  • 30 Years specializing in adults 40+ with complex joint history
  • 2,000 hours of advanced coursework in biomechanics, neuroscience, and muscle function
  • Was one of only 14 global instructors and 85 Master Specialists in Muscle Activation Techniques
  • Has created instructional content for BJJ Fanatics
  • Has written and teaches his signature course, Decision Making 101: From the Table to the Floor, to trainers around the world

Jiu Jitsu Credentials

  • 4th-degree Brazilian Jiu Jitsu Black Belt
  • 15× NAGA Champion
  • 2× Grapplers Quest Champion
  • 2× AGC Team Champion
Dominick Nusdeu certifications

How Theorem is Different

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Lab, not a gym — Appointment-only Strength & Longevity Lab for women 40+ with joint issues
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Assessment-driven — Not workout-of-the-day
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Joint-safe, 30-minute strength sessions — Built from your Assessment
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Proof every 4 weeks — With simple re-tests
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12-Week Rebuilds inside a longer-term Strong For Life plan — Not just short bursts
Book Your 10-Minute Pain-Free Plan Call
How Theorem Strength & Longevity is different