I love this gym! I've been a member for almost 3 years and have been here through many journeys of…read moremy life. I started when I was in the best shape of my life, I went when I was "shredding for the wedding", and now I am a new mom working on my postpartum fitness goals. John, the owner gives great advice not only about fitness but nutrition too. He has even written a few books! The class sizes are small and allow for a lot of one-on-one attention. All of the members are extremely friendly and welcoming to anyone new. I also love that John creates specific workouts for each class. I never have to think about what I'm going to train that day, and if you go regularly you'll be able to incorporate both HIIT cardio and strength training. John's wife, Samantha teaches yoga once a week and it is the best yoga class I've ever taken! You will feel so stretched out and relaxed after taking her class. If you're looking to switch up your fitness routine and get in shape I highly recommend trying metabolic!

If you're looking for a variety and a great support system this is the gym for you. Coach John and…read morecoach Sam provide much support and guidance for your goals. I appreciate the nutrition aspect of the gym as well. The different varieties of classes always makes the work outs fly by. There are three different types of classes offered multiple times throughout the week; TNT, muscle and hustle, and meltdown. Each class has a 3-week progression to help build strength and endurance. TNT is strength training with six exercises total; three for the upper body, and three for the lower body. I have gotten so strong taking this class. Muscle and hustle is a mix of strength training and cardio. And meltdown is an hour of straight up cardio. If you're not breaking a sweat after this class then you're doing it wrong! At various times there's also different pop-up classes. The newest class on the block is pump. It has the same structure as meltdown but also using lightweights. There is also a class just dedicated to abs, call deck of core. There are many members that are at many different levels. But we all support one another. I've never met such a great group of supportive people as I have here.

Mary taught the SATURDAY ZUMBA class! My first time! AND MY SECOND TIME WAS MONDAY…read more Wow! Fun music and amazing choreography! Lovely teachings. Nice facility with nice decor and lots of fitness machine, yoga classes, massage and sauna too. I look forward to coming back AGAIN for the next Zumba CLASS!

Very disappointing. Staff is not helpful. A trainer, Clay Nehring, was rude, arrogant and…read moredistracting when I was performing a heavy lift creating a dangerous situation for me. A maintenance worker harassed me in the sauna and locker room. Overall, there are too many other good gyms in the area to waste your money here.

I'm reluctant to write a review because selfishly I love working out in a gym that's not packed but…read moreI love small business owners. When you walk in, you'll see all the cardio equipment and they also sell a bunch of energy drinks and meal prep meals and delicious protein baked goods. When you go downstairs, they have a wide variety of machines and I love the old school bodybuilder vibe

I haven't been a member for years. I don't even live in the area. I've tried to unsubscribe from…read morethe email list. I've called asking to be unsubscribed. I'm still getting spammed. I feel like I'm being harassed.

Overpriced gym with worn down equipment. If you are gong to charge 100+ a month at least have newer…read moreequipment with more options. The pool is nice but you can never use it because there are always swim teams there. Planet Fitness has better equipment. Do better !

I took the free class here, and plan to come back for my month of my group-on that i have for here…read morebecause i absolutely LOVE this place! Eugene was awesome! It was a little pricey for a college student (Drexel) who works two part time jobs to pay for books and tuition not paid for by my scholarship. But sadly, at this moment in time - i had to find another crossfit gym to teach me the basics for cheap and then i will come back and get an awesome workout for a month there! I am sooooo excited i get to go back! I was so bummed when i couldn't get my parents to pay partial for it. but hopefully when I'm out of school I can come back to this gym because there is something about the gym that makes you want to work harder-and push yourself to the extreme. Eugene was the best! Loved the workout! Hated how sore i was the next day.....but it felt awesome!!!! if you can go to this crossfit dont pass up the chance! its an amazing gym!

As someone with little to no prior gym experience, I have increased my confidence level training…read morewith the coaches in the Thunder and Lightning Adult Program. The gradual introduction to training has alleviated any fears I had about handling equipment and traditional weight training. The program's structure, with changes every four weeks, ensures I receive a comprehensive full-body workout while progressing at a comfortable pace. Recently, I faced a recurring issue with my shoulder. I reached out to Coach Shawn, and by the time I arrived several hours later, adjustments had been made to my program. I have never felt pressured to push myself beyond my limits; instead, I am consistently encouraged to keep moving forward. The owner Connor has a pulse on everyone that walks through the door and from what I have observed, he is an excellent role model for all the young athletes who are training there. The supportive environment and personalized attention from all the coaches at the gym have made all the difference in my fitness journey. HIGHLY RECOMMENDED!

A couple months ago we were looking for a gym where my 14 year old son could work out. The owner of…read morePPH baseball recommended Thunder and Lightening to us. We came to look at the gym. We spoke with the owner about his programs. It's a really nice place. A little small. Wide range of age groups. Tucked away in a strip of businesses in Trenton. In addition to personalized training program, my son receives nutritional counseling. Son has been coming here for a couple months now and really likes it. He's getting stronger at a reasonable pace. Guys and gals in the gym that he's met are nice. Monthly fee is reasonable for what you get. Thinking about having my younger son start here in the spring. Very happy!

Sid is a phenomenal owner/coach. He takes pride in what he does and it shows. His infectious…read morepersonality and positive attitude have certainly attracted like minded people to this wonderful gym. The coaches/staff (Vicky, Debbie, Danielle, and Jenny) are very knowledgeable and enjoy what they do. We have all been to workout classes where the routine it's repetitive, the coaches are overworked, and the workout/membership follows the culture. That is not the case at Underlying Strength. My Fiancé and I are so thankful we joined.

I have been training here with Myrna since November 2014 and it's the longest I have ever worked…read moreout. It has been really helpful to have someone push me to do better AND to do do better without getting hurt. I used to have knee problems and could never keep up working out on my own and got discouraged but now it has been 9-10 months and she has helped me keep it up without getting hurt! She teaches me new things when I go and helps me create workouts to do on my own so I only need to go once a week. The prices are awesome ($40 for an hour on your own and $25 per person if you go with someone else or a group), I think it's better than everywhere else around. She makes you feel welcome and at ease from day one, always encouraging, positive, and fun. Basically, it's awesome, and I'm super excited to be getting super buff.