★ 5

Source: Google

★ 5

If it wasn’t for Kevin or AJ or the whole Underdog team, I would not be where I am today. Not only have they spent the time to make be a better athlete and version of myself, but they welcomed me with open arms from day 1 and welcomed to absolutely incredible team that I call my second family!

Source: Google

★ 5

Kevin and Jess have something special here!

Beyond their local gym operation they have distinguished themselves, and the Underdog name, as the dominant force in hybrid fitness training. The distinctive Underdog race jerseys are worn by competitors standing on podiums throughout the globe. This is because they, and their team of coaches, deliver top notch programming and individual attention for athletes of all abilities.

Anyone who has a passion for DEKA or HYROX competitions should consider the coaching options available from Underdog. The personalized programming, the support and camaraderie of the Underdog team, and the accountability that the excellent coaches inspire, make a real difference! I give Underdog and my coach Ricardo Mullinax my highest recommendation!

Source: Google

★ 5

Underdog Fitness in preparing for Deka/Hyrox and OCR events is hands down the best training experience I’ve had in starting out as just completing them to reaching podiums and becoming my best self! Kevin Gregory and the other coaches go above and beyond— they are knowledgeable, motivating, and genuinely care about helping each person reach their goals. They walk their talk! Very Inspiring, motivating and supportive all the way and have created an awesome community!

Source: Google

★ 5

This community is a cheat code - if you want to be surrounded by folks that lift you up and make you better, Underdog is it.

Source: Google

★ 5

My brother and I participated in our first Deka Strong (teams) at Underdog in Wallingford and it was such a great experience! Welcoming and friendly group; extremely knowledgeable trainers; and a successful day for our first time!

Source: Google

★ 5

This is the place to get a fit body and a fit mind. Coach Kevin pushes you to the max and you benefit from the results. Underdog Wallingford is an awesome place to have fun while achieving your goals.

Source: Google

★ 5

Source: Google

★ 5

I originally met Kevin at DEKA Fit SoCal and saw him crush the bike in 18 seconds. (Absolutely mental if you’ve ever tried a 25 calorie trial). I live in California and had been messaging with him about training. He took the time to break down ways for me to get better as I’m newer to the DEKA/Hybrid sports scene. That’s when I knew I had to take a chance and invest into online training with this team.

Boy was it the right move, from the expertise by all the coaches (S/O my beast of a coach AJ) to the most welcoming community full of savages. Every single person in this group pushes themselves to the best of their abilities, support one another, and the bonus, are genuinely kind people that know how to fun as well. So if you want to be inspired every day to push yourself to be the best version of yourself, go ahead and check this team/gym out. You won’t regret it.

My only negative is they are located across the country from me lol.

Source: Google

★ 5

I have come to Deka events at Underdog for the past couple of years and everyone has always been very helpful & encouraging! I decided to start training with the team this year and have seen nothing but success! Kevin, Jess, & AJ have been nothing but supportive and have helped me achieve my fitness goals!

Source: Google

★ 5

The best gym around. It definitely has the best trainers that specialize in one on one training for your specific goals and coaching you thru them. I highly recommend them to anyone looking for a trainer or gym to go to. Kevin and Jess are the best around with their trainers producing top level athletes.

Source: Google

★ 5

Outstanding gym and people. Great events, training and facility. Highly recommended

Source: Google

★ 5

Best in the business, truly. Underdog Fitness holds an extremely high standard. From their online coaching, in-person events/classes, and facility, there's no beating this place and community.

Source: Google

★ 5

Underdog fitness has changed my life! I feel stronger both mentally and physically thanks to everyone at Underdog! I could not recommend this community enough.

Source: Google

★ 5

I first discovered Underdog Fitness on Instagram, following Kevin Gregory. I actually live in the uk and had qualified for the Deka World Championships in Florida. Kevin was absolutely amazing and offered me some 1-1 coaching with one of the Underdog coaches, AJ. What an experience! First up I followed it to the letter and won my category! I met the whole Underdog Team in Florida who were the nicest people I have ever met! Now back in the uk I have continued my coaching journey with underdog and won my first competition of the year!
I can highly recommend Underdog even if you can’t get to their facility, it’s amazing being part of a team and their knowledge and coaching is second to none!

Source: Google

★ 5

Great gym & fitness community! Owners are super friendly, knowledgeable & equipment is great. The events hosted for Deka & Hyrox bring in a great extended community & you can really see why functional fitness is for everyone😊

Source: Google

★ 5

I went to underdog for the first time 3 years ago for a deka strong. Back then I could’ve never imagined I’d be where I am now. I first started going to underdog just to do dekas every couple months and thought about training with the crew every now and then but never pulled the plug. Finally in 2024 I decided to join the podium chasers program and never thought I’d be where I am now. Before 2024 I had never done a half marathon, and by the end of the year I had done 6 trifecta weekends along with 4 regular half marathons. I honestly never thought that would be possible. Now in 2025 I’m planning on doing 13 trifecta weekends along with a few half marathons. The only reason I’m able to do this is because Kevin and the crew at under dog have put me in a place with my training that’s allowed my body and mind to realize I actually CAN achieve those goals. I can’t thank Kevin and underdog enough for getting me to the point I’m at today in just over a years time. Whether you’re looking to get better for racing, looking to lose weight or play a sport, underdog is absolutely the place to go for it

Source: Google

★ 5

Underdog fitness is the best place to get a good workout at any level of fitness. The staff are friendly and super supportive. Get here for your deka or spartan training!

Source: Google

★ 5

Source: Google

★ 5

signed up for a HIIT class while visiting my gf’s family in CT. Super welcoming and made me felt like I was a regular. Great workout too!

Source: Google

★ 5

If you compete in OCR, Hyrox or Deka, this is the best gym to go to in the world! Kevin and Jess are insanely knowledgeable on these sports and genuinely care about the success of each athlete. If your goal is just to lose weight or stay in shape, they provide a fun and caring atmosphere to help people achieve their goals.

Source: Google

★ 5

I went to Underdog Fitness for two Spartan Deka events with my daughter last weekend. Owners Kevin and Jess were friendly and helpful in making sure we were all squared away to complete them. The gym offers a fun and supportive but challenging atmosphere to draw out your best efforts. Highly recommend anyone in the area or visiting (as we were) check them out!

Source: Google

★ 5

Jess and Kevin are some of the greatest people you'll ever met. Incredibly passionate about fitness and helping others while also being the kindest humans imaginable.

Source: Google

★ 5

Awesome people at Underdog Fitness. Great energy, very motivating and has an awesome community. If you live locally I'd highly recommend them, makes me miss my old CF box. If you do Deka Spartan events, check them out!!

Source: Google

★ 5

No nonsense, great people.

Source: Google

★ 5

I have known Kevin for a number of years and he is a true professional and an amazing athlete and person. Kevin and I worked together so I know firsthand his level of dedication and passion.

My daughter and I attended one of his Spartan Deka events and it was an amazing experience

We both competed and had an epic time thanks so much for the amazing experience Kevin I truly appreciate you and applaud you and Jessica for delivering results and an experience.

Excited to watch your journey from here and I highly recommend giving this dynamic duo an opportunity to remove some obstacles from your life and add them to your workout routine

Source: Google

★ 5

Source: Google

★ 5

Hands down, GREAT WORKOUT!! I have been working out with this team since the start and they never cease to disappoint. They learn you, your workout style, and everything else needed to CHALLENGE you! If you have doubts, ignore it and JUST DO IT!

Source: Google

★ 5

Kevin is an awesome coach, I had worked with him for years and he knows his stuff.

Source: Google

★ 5

Great gym. Kevin and Jess are amazing and very dedicated. If you want to get in shape or being it ro the next level its the place to be!!

Source: Google

★ 5

I attended Underdog Fitness Spartan DEKAFIT competition. Both Kevin and Jess were extremely helpful, courteous and motivating. It was a fun and challenging event. Of all the competitors I saw at this sold out event, I didn’t hear one negative thing. Just all sweat and smiles. Do yourself a favor and check this place out.

Source: Google