About

If your goal is to be healthier,

You belong here

At Foundation Fitness Center, we believe that every journey begins with a single step. We are here to support you in building a stronger tomorrow. Share your aspirations with us, and let’s rewrite the story of your fitness together. Innovation and community drive our mission, inspiring you to truly be the best version of yourself.

Authenticity is key, so let your voice resonate through our memberships. There are countless gyms out there, but the foundation of your personal journey sets us apart—trust in your unique narrative as we help you elevate it to new heights. If the words you see here echo your determination, it’s a sign you’re ready to transform.

Meet the Owners

Brent and Sierra Derby are the proud owners of Foundation Fitness Center in Gaylord.

The couple met over 10 years ago in a gym right here in Gaylord, bonding over their shared passion for physical, mental, and spiritual health. Since then, working out together has become their way to stay connected—like a healthy and positive version of date night. For them, the saying “Couples who workout together, stay together” rings true.

Sierra, originally from Atlanta, Mi, and Brent, who grew up in mid-Michigan, have traveled across the country with their business, Wood Line Productions, a yacht renovation company. Their travels exposed them to a wide range of communities and gyms, giving them firsthand experience with different fitness environments and approaches.

With this extensive experience and a deep love for Gaylord, Brent and Sierra saw a great opportunity to open an all-inclusive fitness facility that offers a dynamic experience for its members. They understand that, as the fitness industry evolves, so must the way gyms connect with their members. One of the most crucial aspects often overlooked is truly listening to and caring for members’ needs. Brent and Sierra are determined to build a Strong Foundation—starting with their members' voices—and grow from there.

Sierra Looney-Derby brings over 20 years of experience in the fitness industry, having successfully owned and operated dance and aerobic studios. Her expertise spans personal strength training and fitness management, making her a well-rounded leader in the field. Sierra’s lifelong passion for health and wellness drives her commitment to helping others achieve their best selves. She’s excited to share this passion with you and empower your fitness journey!

Brent Derby brings nearly 20 years of experience in the fitness industry, including successful gym ownership in Grand Rapids. His expertise spans personal training, physical health research, and guiding others to achieve their fitness goals. For Brent, the gym has always been his go-to stress outlet, and he’s passionate about connecting with members to help them reach their full potential.

more than just a gym

We Build Strong Foundations

The house without a strong foundation will surely crumble.

  • We believe that building a strong foundation is crucial for every aspect of life—physically, mentally, and spiritually. At Foundation Fitness, we strive to help our members strengthen all these areas, creating a balanced and resilient foundation for life.

    (Matthew 7:24-27)

  • The journey to becoming our best selves is ongoing, and we believe that support makes all the difference. At Foundation Fitness, you’ll find a dedicated team ready to support you, no matter the challenge, as you work toward creating the best version of yourself.

  • Our foundation is built on these core values:

    • God First: He is the Ruler and guide in all that we do.

    • Family Second: They are our closest supporters (and the ones who have to put up with us, lol).

    • Country Third: Our nation is where we live out our lives. We believe that God blesses a nation that seeks Him, and we stand with those who have defended this country to protect it from harm and give us our freedoms.

  • We’re here to support and encourage you as you push to give it your all. While no one can do the work for you, we’ll be right beside you every step of the way. You’re not in this alone.

  • Half the battle is showing up, and we’re here to cheer you on every step of the way. You can do this! Physical and mental health go hand in hand, so let your workout be your outlet, not a chore. You won’t regret it.

  • No matter who you are or where you are in life, Foundation Fitness Center is your outlet. We’re here to support you in building a better tomorrow. Whether you’re facing challenges at work, troubles at home, past struggles, addictions, mental overload, or physical health issues—whatever is weighing you down—Foundation Fitness is on your team, striving alongside you for a brighter future!

  • Be confident... and humble.


    Be strong... with empathy.


    Be a leader... while remaining a student.


    Remember your past... as you work toward tomorrow.


    Be still... and meditate without the world’s static noise.


    Build a Strong Foundation for yourself... so you can be there for others.

Let’s do this!