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    Underground Fitness

    4.8 (54 reviews)
    Open 5:00 am - 10:00 AM, 1:00 pm - 7:00 PM

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    Services - Underground Fitness

    Group fitness

    Personal training

    Weight counseling

    2 More Services

    Personal coaching

    Weight plan development

    Underground Fitness Photos

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    Recommended Reviews - Underground Fitness

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    Reviews With Photos

    40 pounds lighter in 1.5 years :-)
    Pavan L.

    I have been with UF from the past 1.5 years and I can't say enough good things about these guys. The whole vibe at UF is extremely encouraging and positive - thanks to all the trainers - Trisha, Jake, Dave, Jon (and the new guy) who make each session very much focussed on individual needs and at the same time, they are absolute fun -- intense but fun :-) Thanks to Trisha, I lost all those extra pounds I put on (working from home is really dangerous for the waistline :)) but most importantly, I gained strength, a bit of muscle (yayyy) and an understanding of how a correct posture can help enhancing the exercise routine. Did I say that Trisha is a stickler for correct posture :-D? The best part - I gained enough confidence to venture onto a single day 'Rim-River-Rim' hike at Grand Canyon - not recommended by NPS and I wouldn't recommend unless you are extremely prepared well enough. I finished the whole hike in 14 hours and lived to tell the tale :) Without all those leg days, which I seriously dread even today, I couldn't have ventured onto this adventure. For a guy who had a tough time climbing the stairs at my home, this is indeed extra special. Thank you, Trisha, for helping me in this journey. You are a rock star!! Give these guys a try. They can really change your life :-) **Pic on the left is from Dec, 2017 and the pic on the right is March, 2019 from Grand Canyon

    I was stuck in such a rough patch in my life, I'd hardly eat more than a meal a day, or would mostly consume junk food, and would rarely work out. After getting out of a toxic relationship, I found underground fitness after looking through several gyms, and this one seemed the most genuine to me, which IT SURE WAS. One of the first things Dave told me during our first walk in meeting was "We don't just want to transform you for 9 weeks, we want to help and provide you with knowledge that will benefit you for the rest of your life." Everyone at the gym is so friendly, I felt absolutely no judgement from anyone there. Both Dave and Liz showed me so much kindness, and have helped me sooo so much. I highly recommend this place to anyone who's looking for a lifestyle change with a happy, loving environment!

    Jason G.

    I destroyed my foot in early April so about a month ago I decided to seek a personal trainer to help with the rehabilitation--my goal is to get back onto a basketball court sooner rather than later. I looked at a few places in the area, but when I walked into Underground Fitness I knew I was in the right place--the vibe was right and the music was right, so I violated my own personal boycott on all businesses on Yam properties and signed up. I was hooked up with the rehab specialist, Trisha Thurston. Trisha is the real deal. This was perfect; some other people who work out here have nicknamed her "the assassin" and I had explicitly asked for a "drill sergeant" because when I was in high school I had worked out with a world-champion bodybuilder who, as I had said, "had an assassin's mentality" towards workouts. There's no use going for training if all you want is for the trainer to tell you that a light workout is just great. At the same time right now I have to be a little more careful, and Trisha gets that--which some other drill sergeants might not. Trisha has worked to strengthen the muscles around my foot, also around the other ankle (in which I tore a tendon some time ago), and to help me regain my balance on each foot. She's really focused on my calves, glutes, hamstrings and hip flexors, and I feel better and stronger after each workout. I highly recommend both Underground Fitness and Trisha individually to all those who, like me, are in need of some help building back their strength after a major injury.

    My first competition season could not have been done without Kerry & Dave.  I owe it all to them!
    Paige W.

    I do not have enough amazing things to say about Underground Fitness or Dave and Kerry and truly the entire team. When I started with them I was leaving an awful coach who was starving me while training with them for the past 5 months I have regained a healthy relationship with food. LOST weight while eating MORE! And began enjoying every aspect of the gym again. Dave constantly challenges me every time we work out. Kerry is always a text away no matter the time of day or what they are doing. The gym has a friendly family atmosphere that never makes you feel ashamed of where you are starting or what your goals are. I cannot recommend them enough. No matter what you are wanting to achieve they can help you.

    6 month transformation

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    No response to calls left vm for rob ? Someone said he would call back as did vm msg no response

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    Page 1 of 2

    Ask the Community - Underground Fitness

    Review Highlights - Underground Fitness

    Dave and CJ are both extremely knowledgeable and do their best to help keep you motivated.

    Mentioned in 24 reviews

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    Arrowhead Fit Body Boot Camp

    Arrowhead Fit Body Boot Camp

    4.9
    (34 reviews)
    1.3 mi

    It's time to update my review. It's been almost 2 years and I am so glad I took the chance and…read morewalked through the doors. I am so much healthier, happier and strong enough to kick some ass! This was the best choice I have ever made for myself and my results speak for themselves. I recommend if you are looking for a fun and challenging workout to give this place a try. There is modifications for any body type. The hardest part was actually getting here but after it becomes a routine you look forward to it everyday. I love the coaches and the others here and I owe my physical as well as mental health to this place. Thank you for giving me everything I was missing out on back!

    I did really like this place. The trainers are fun and do a good job to keep you motivated without…read morepushing you past your limits too far. They offer alternative exercises if you have had knee injuries, or other injuries, in the past or something to that effect. They'll walk you through the different "stations" prior to starting, will monitor your progress and form, and offer guidance to anyone who needs it. They don't scream at people who take a quick rest, but will make sure you're still pushing yourself throughout the workout. I would've liked to sign-on to continue a membership here, but due to my job requiring me to travel at different times, it didn't seem like that was a viable option. It's difficult finding gyms that can pause memberships for certain circumstances. (I get it, it's a lot to ask.) Regardless, I'd recommend this bootcamp to anyone looking for a good workout that will keep you motivated. The other patrons share the same goals as you and everyone seems to support each other. **Cool note: I got sick towards the end of my promo membership and determined it best to stay home, away from others while I got better. I received text messages from the staff (Crystal), asking where I was and just checking up on me. I thought that was pretty cool of them to take the time to reach out. Thanks, AFBBC!

    Photos
    Debbie is CRUSHING it!!!
    Debbie is CRUSHING it!!!
    With hard work and determination Amy O. dropped 19.8 POUNDS in 6 weeks at #ArrowheadFBBC!!!
    With hard work and determination Amy O. dropped 19.8 POUNDS in 6 weeks at #ArrowheadFBBC!!!
    Stacie lost 16.6 Pounds in just 8 weeks!

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    Stacie lost 16.6 Pounds in just 8 weeks!
    Mountainside Fitness Arrowhead

    Mountainside Fitness Arrowhead

    3.6
    (140 reviews)
    2.0 mi

    This review is specifically for the childcare…read more The girls working here are truly wonderful and I appreciate that most of them are moms. I don't even know where to begin. Dropping my 4th baby off was just as hard for me as my 1st baby! As a stay at home mom, and a homeschooling family, I am very picky about who watches my children. Walking into the gym only being 8 weeks postpartum, I was really nervous not only because it was my first gym experience, but mostly because I had a little bitty 8 week old newborn baby and I didn't want anyone to watch him other than me I let Kylah (the childcare manager) know that I was really nervous about dropping my newborn off. She was attentive and understanding with my initial concerns, but her sweet demeanor and confidence she displayed reassured me as she talked me through everything. I felt comfortable dropping them off and since then our family has been coming pretty consistently M-F since April, and now, they can't get rid of us! Other girls I can think off the top of my head that are also just so sweet with my kids are Amber, Alexis, Samantha, Christina, and I'm sure there's more. Kylah does not receive enough credit or recognition for her hard work. Her ability to manage the needs of multiple children while still giving individual attention is truly impressive. She treats them as her own. She listens to me and what I might want for my kids that day, she does her absolute best. I trust her and I appreciate how patient and attentive she is with children, no matter the situation. She handles challenging situations with grace and professionalism, always putting the children's needs first. She consistently goes above and beyond, and I know my kids are in good hands with her.

    I can't place my membership on hold over the phone? I am out of state and a conversation with the…read morecorporate office cannot do anything to help? Also nice job dealing with covid - trainings we canceled but you still charged. Class act my friends.

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    Oh yeah!!!
    Oh yeah!!!
    Mountainside Fitness Arrowhead
    Mountainside Fitness Arrowhead

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    EōS Fitness

    EōS Fitness

    3.3
    (232 reviews)
    0.6 mi

    Writing this review specifically about the kids club. We love the kids club and the girls that work…read morethere. We were informed yesterday that they are closing the kids club. I feel this is a huge mistake as this location is so family rich. The girls in the kids club have made a huge positive impact on our kids, it's helped them to socialize with others, learn how to strengthen their bodies and build confidence in the process. This decision by EOS is causing us to have to leave the gym and search for a new option. I'm sure they will loose a lot of families because of this. I think it's a huge mistake on their part to remove the kids center and we are very sad that we will be loosing a spot where we felt safe, happy, and confident because of the amazing staff inside this kids care center.

    I've been visiting this gym for quite some time. I've also reviewed the reviews and honestly don't…read moreunderstand the negative reviews. I've always had a pleasant experience at the gym. Sure they did construction for a few days, but that needs done to improve services. The staff has always been kind and attentive. Yesterday, I was truly impressed by the employee who was cleaning the men's locker room. He was putting detail into cleaning and really left the locker room very clean. My only criticism isn't the fault of the gym but the result of having a successful gym. It gets very busy in the afternoon so when time allows I just come in the morning. I've gone to different gyms in Phoenix and have always appreciated EOS. This is not my preferred location but it is the closest to my house. With that said, this is still an amazing gym that will help you reach your fitness goals.

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    EōS Fitness
    EōS Fitness
    EōS Fitness

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    Underground Fitness - healthtrainers - Updated July 2026

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