Yahoo
Wide open and spacious turf area for stretching and functional training.
5 adjustable benches, preacher curl, cable equipment
Cool color lighting that we change on occasion.
Excellent equipment, check out this Leg Machines
Fix your lower back
Main cardio room: 6 Treadmills, 2 Stairmaster, 2 Bikes and a Rower
Custom Underground Combo racks.
We have an Infrared Sauna, 2 Changing Rooms, a Shower and 3 Bathrooms!
Fitness Underground Health Club

24/7 Access Memberships Personal Training Nutrition Coaching Powerlifting

Website: fitnessundergroundofficial.com

Phone: (909) 921-6908

Interested in our services?

Open now

  • Sat Open 24 Hours

1410 E Foothill Blvd, Ste JK Upland, CA 91786 ·2151.60 mi

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Amenities

  • Accessible
  • Family friendly

Reviews

yelp
5.0 56 reviews
5 star
55 4 star
0 3 star
0 2 star
1 1 star
0
Matthew D. 09/15/26

Recently was buzzed in for a day pass and it's clear the owner, Ian, care a lot about his powerlifting gym. It's well equipped (6-8 benches with safety racks, 3+ deadlift stations, a couple of...

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Gabe M. 08/09/26

I was in the area and I was looking for a gym that was a little less crowded and this exceeded my expectations. I saw the reviews for this place and decided to call and get a day pass. It's true...

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Alicia W. 07/10/26

I have been going to Fitness Underground for a year. The gym is designed with a focus on power lifting and overall strength training. I was especially interested in lifting heavy weights but I...

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Jonathan J. 03/25/25

just started coming here with my buddy recently and i don't regret it. they have the best lifting equipment and machines i've seen out of any other gym i've been too in a 30 minute radius. The...

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Nancy S. 08/19/25

I've been coming to FU since July 2024 and it has changed my life. As a female, I was always intimidated by weights but I hired Denisse as my coach and she has taught me proper form and safety....

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