Born in a garage, Built on Strength

At Underground Strength, we believe in the life-changing power of strength training. This belief isn’t just something we preach—it’s deeply rooted in Leonard Martingano’s personal journey.

Leonard didn’t take the easy road to get here. Raised by a single mother and labeled with a learning disorder as a child, he grew up facing challenges that could have easily held him back. But Leonard had other plans. He found solace and strength in the weight room—a place where labels didn’t matter, and the only thing that defined him was his determination.

This wasn’t just a hobby. Strength training became his sanctuary, his passion, and ultimately, his purpose.

In the fitness world, Leonard noticed something that didn’t sit right: too many people felt lost in big-commercial 24/7 gyms or stuck in cookie-cutter HIIT classes that didn’t deliver real results. Endless hours of cardio, generic routines, and lack of support left people feeling frustrated and burned out.

That’s where Underground Strength was born—a space where strength training takes center stage, and every client is treated as an individual.

Our mission is clear: to help people unlock their full potential through strength training, just as we did. We know firsthand that building a stronger, healthier body can have a ripple effect—boosting confidence, resilience, and happiness not just inside the gym, but in every aspect of life.

At Underground Strength, we don’t just help you lose fat or get stronger. We help you reclaim your energy, build resilience, and unlock a confidence you didn’t know was possible.

Whether you’re stepping into the gym for the first time or rediscovering your love for strength training, we’re here to guide you with tailored coaching, real progress, and a community that’s got your back every step of the way.