Underground Fitness

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3101 Whipple Rd
Union City, CA 94587

Underground Fitness is a local gym in Union City, CA that offers a variety of workout equipment and fitness classes.

With a focus on providing a welcoming and supportive environment, Underground Fitness aims to help individuals reach their health and wellness goals.

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Reviews

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5.072 reviews
S. N.
7/12/2025

UGF has truly transformed fitness for us, from energizing group classes to personalized 1:1 sessions with Yo. The coaching team (Mike, Yo, Alex, and Ashley) create a friendly, inspiring space that...

Jess S.
2/1/2024

If you're looking for a place to work out that is supportive and will ensure that your form is correct. This is the place. The coaches are all amazing and really care about their clients,...

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ankur v.
4/28/2023

I've primarily worked out with Yo for the last 6 months, from private trainings to classes. I was daunted about going to a "real" gym, with things like large tractor tires and metal weight...

Lyra Mae C.
4/30/2023

This review is long overdue. It all started with me just wanting to find a place to workout so I can lose some weight for a trip. Now, almost three years later, I'm still here along with my...

Sarah K.
1/9/2024

UGF has been nothing short of life-changing. The instructors here aren't just trainers; they're motivators who genuinely care about your progress. They consistently encourage you to push your...

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