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Fitness Underground is a premier gym located at Redhill Plaza in Upland, CA. This gym stands out with its 24/7 accessibility, top-notch personal trainers, and a welcoming community atmosphere. Clients rave about the dedicated trainers like Ian and Marisa, who offer personalized workout plans and support. The gym also hosts social events and has a variety of equipment suitable for powerlifting and strength training. Many members appreciate the clean environment and the positive vibe that prevails.

If you're looking for a gym that prioritizes individual fitness goals in a supportive and inclusive environment, Fitness Underground is worth considering. However, some users have raised concerns about the transparency of fees, so it's advisable to clarify all costs upfront. Despite this, the overwhelmingly positive reviews suggest that Fitness Underground offers a high-quality fitness experience.

Pros:

  • Open 24/7
  • Highly skilled trainers
  • Personalized workout plans
  • Wide variety of equipment
  • Clean and well-maintained facility
  • Supportive community atmosphere
  • Focus on powerlifting and strength training
  • Healthy food and snacks available
  • Hosts social events for members

Cons:

  • Reports of unclear fees
  • Can get crowded during peak times
  • Limited information about group classes

Location / Contact

Rating Stats

4.8

out of 5.0

36 reviews
5.0
1 reviews
4.0
2 reviews
3.0
1 reviews
2.0
0 reviews
1.0

Reviews (40)

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I joined this gym in early December to start getting stronger and to lose some weight, Ian and Marisa are great! In just the month I've been training my squat has gone up 45lbs and my bench has gone up 35lbs great place if you're looking for a strength training or powerlifting gym. #Underground

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Fitness underground is the best gym i have ever been to! I love going to bootcamp, open gym, and personal training with Marisa! They have all the best equipment with a large variety and the best trainers who always want to help!

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Not too long after New Years, I was on the traditional “I am going to get in shape this year” kick like everyone else who set new year resolutions. I had seen an ad on Instagram for Fitness Underground and thought, man this could truly be a different experience and it’s so close in proximity! At the time, I was working out a Chuze and didn’t necessarily have any complaints, but lacked the closed-knit atmosphere and lacked the free weights I grew up being used too as a football player. I had signed up, not necessarily seeing the gym itself, but didn’t necessarily have the motivation to get in there. It wasn’t until the owner Ian called me and let me know that he felt bad charging me for another month without me stepping foot in the gym. He ask when I could make it in so I could check out the place and get the feel of the place.Shortly there after our conversation, I was able to meet Ian officially and also go over some of the basics for lifting and testing my strength. It was humbling to see that I wasn’t as strong as I thought, but also reminded me the reason I was here in the first place. Ian offered to build out a personal program for me and has continuously done so for the last 7 months. I can tell you from personal experience, the programming has helped me “check my ego at the door” as Ian would say as well as encouraged me to continually come back and try to dominate another week as it gradually edges you up in “PR’s” or personal records. I can say confidently, I am stronger than I have ever been in my life, I have more confidence than I’ve had in a long time and I truly love my gym. It’s a place where you can be yourself, are encouraged by everyone and where the owners Ian & Marisa believe in their athletes and want them to have the best atmosphere to compete, to better their lives and to have a place to belong. If you are looking for a change up in weight lifting or a place just to get back in shape, definitely give Fitness Underground a look. I personally have enjoyed my experience and transformation. Thanks for all the support F.U. I am forever grateful!

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The long and short of it is, if you're serious about reaching your fitness goals, Fitness Underground is the way to go!!I signed up for my first ever Spartan (this one happened to be a Super), which was on Jan. 27, 2018. Leading up to that date I had been searching for a gym and personal trainer who I can trust and be comfortable with since I had a few nagging sports injuries (right knee and left shoulder). Marisa took her time to ask me questions, assess me, and review my goals. She customized personal training sessions to maximize my strengths and strengthen my weaknesses. In this case my biggest weaknesses were grip strength, core, and lower back. Marisa's technical training made a huge impact and was the difference! So much so that I dominated 23 of the 27 obstacles.Thank you Fitness Underground!Next stop, Spartan Beast, Sprint, and my Trifecta.

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This gym is awesome! I enjoy coming to bootcamps in the morning at 6 am. Marisa is a great trainer, and really cares about you. If you have an injury and let her know. She will help you modify each exercise. Bootcamps are always fun and motivating. We all have such a great time. It really makes working out fun! I like that Marisa incorporates different exercises and she even does kickboxing Wednesday's.

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Nicest owners! Professional and modern place. You can tell the trainers are all there because they truly love it and thrive off of helping their clients. It’s a great experience, especially comparing to the bigger chain gyms that only care about the money and memberships. Fitness Underground is different and it is so refreshing!

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I've been living in Upland for practically my whole life and have tried literally every gym but never felt at home. I actually found this place while going to pick up some food at the Meditteranean restaurant nearby and was very excited to get a membership after getting a tour by the owners, who are awesome by the way! I come in and do my thing and everyonce in a while I will do a drop in for group training but am not currently enrolled in the unlmited because I usually prefer training by myself. I highly recommend the open gym membership for anyone who likes to lift weights in a very cool environment! They have all the equipment I need to maintain a strong, functional mind and body. Check it out!

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Great workout atmosphere. Ian and Marisa are very nice and helpful. This place is unique and great for everyone who wants to reach their fitness goals!

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Outstanding gym, the owners Ian and Marisa really care about each individual lifters success. They have fully committed to having heir own powerlifting team that will be competing later this year. The gym atmosphere is great, something that will definitely breed greatness of each individual lifter. Best gym this side of the Mississippi

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Frequently Asked Questions

Except the peak hours, this place remains quite free or moderately crowded.

This business has a rating of 4.8-star.

This business has 40 reviews.

The address is: 1410 E Foothill Blvd Suite JK, Upland, CA 91786, United States .

The contact number is +1 909-921-6908

This service is listed under Gym .

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