3150 Spring St (Lower Level), Fairfax, Virginia 22031

Experience Fairfax's Top Choice for Fitness

Join Our Award Winning Facility: Underground Athlete

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Semi Private Personal Training near Fairfax

Semi-Private Personal Training

Our Semi-Private Fitness Training combines the best of both worlds in one revolutionary program. With custom-tailored training, expert coaches, and a few fellow members to keep you motivated and accountable, Underground Athlete is your source for fitness and community!

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Semi Private Personal Training  near Fairfax

Small Group Fitness

Our Small Group Fitness classes are designed to make sure you never get lost in the crowd. We offer hands-on instruction that is tailored to your unique skill set. Learn more about everything we have to offer in Fairfax.

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Semi Private Personal Training near Fairfax

Hybrid Training

Our Hybrid Fitness Training program gives you the unique opportunity to get tailored workouts, nutritional strategies, and professional guidance... all while you're on the move! Underground Athlete can help you live a happier, healthier life, no matter where that life takes you.

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Semi Private Personal Training near Fairfax

Online Training

Our Online Training program is helping people all across Fairfax get the most out of every movement. We offer a proven path to total-body success by providing you with small steps towards your ultimate fitness goals. Learn more today!

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Our Members

"I can do things today that I never knew that I could do. I feel ways about myself today that I never knew were possible"...

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"My favorite part is that personal connectedness, but on a very different level that's not all about talking and conversation... it's more about how we're all in this together"...

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"One of my co-workers had been working out here for a while and he had been raving about this awesome personal training gym... So I figured I would give it a chance... it turned out to be a lot of fun...

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"Working out here is more like playing every time"...

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"With small groups, you get your one-on-one attention... your group may have a maximum of four people, so you have people to push you all the time."...

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Rebecca and Alan

"Before I started Underground Athlete as opposed to where I am today... I am much stronger, much more confident, and I really enjoy coming to work out and I enjoy what it does for me from a physical s...

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You're Family at Underground Athlete

Are you ready to reclaim your fitness, build new heights of confidence, and revitalize your health

Our team at Underground Athlete is here to deliver high-quality personal training and fitness classes to men and women across Fairfax. We have years of experience helping people from Fairfax and surrounding areas lose weight, build muscle, and become the best they can possibly be. When you train with us, no obstacle is too great, no goal is too big, and no aspiration is too challenging. 

From our fitness classes to personal training, Underground Athlete is your ultimate resource for becoming strong, healthy, and happy. 

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Our Amenities

Underground Athlete has a full selection of amenities such as:

  • Inbody 570

    Inbody 570

  • MyZone


  • Underground Athlete Trainerize App

    Underground Athlete Trainerize App


  • Award Winning Gym

    Award Winning Gym


Look Stronger. Feel Stronger. Live Stronger.

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