Next Phase (now Training Ground) — Local services in Arlington

Next Phase is the best-kept secret of HIIT gyms in the DC area. As someone who has tried her lion's share of different gyms and workouts - CorePower Yoga, Solidcore, Orange Theory, Down Dog Yoga, Balance Gym, Vida Fitness, Barre, Soul Cycle, etc. - I can honestly say that Next Phase provides the best workout out there. As a lifelong klutz who has feared physical activity her entire life, I was shocked that I could not only get through Next Phase's classes without broken bones or fainting but actually enjoy the HIIT classes and supersede my own fitness expectation. I have been regularly attended Next Phase for over a year and am amazed at my progress: I became significantly more toned, developing lean muscle in parts of my body that were never worked out before, and developed substantial athletic endurance and stamina. I actually enjoy going to the gym for the first time in my life. If you want to obtain fast, visible, and lasting results, try Next Phase. It is a no bs, science-based 45-minute workout which pushes you to the limit. In addition, I cannot say enough about the amazing trainers: they are experts in their field and genuinely care about your fitness goals. Large chain boutiques like Orange Theory, which offers repetitive and uninspiring workouts in a small, dimly lit space, DO NOT HOLD A CANDLE to Next Phase. Try it, you will...

I just moved into Tellus Apartment Building and was excited to have a workout studio within the building. Next Phase offers special rates for Tellus residents which is a great added benefit!!

The studio is clean, has free water, a little merchandise, and a very easy check-in process. They have a very convenient phone app to make signing up for classes seamless.

I started with the intro week package and loved the classes and trainers. I regularly workout and still found the classes to be very challenging. Each class is what you make it. You adjust how hard or easy you want each class to be.

The instructors have high energy and take the time to ensure each student knows how to perform workouts correctly. I love this, so I know I am getting the most out of each workout movement and avoid injuries. The music flows constantly which keeps the group pushing hard!

Every Next Phase instructor I’ve meet has been friendly and helpful. The overall vibe of the studio is relaxed, yet motivating. It’s great to walk into class just a couple minutes early, spend 50 minutes, and know I am going to complete an awesome workout.

I highly recommend this studio and would take advantage of their unlimited...

AMAZING workout! All the instructors are extremely friendly and readily gave modifications when a workout was clearly above my workout capabilities. The studio is clean and bright and there is both a place to wait before the class and a place to put your stuff up in the class in cubicles.

I imagine this place is a smaller version of SolidCore (though I have never been to SolidCore since I am still working on finding my core). The workout was so intense that I was sore for the full week and could barely walk. I had to cancel my workout a couple of days later. This class is great for those with an average or better fitness level. Also would be a great class for anyone looking for challenging cardio, HIIT or pilates workout.

The class I did involved leg workouts on the reformer that involved streeeeeetching the move out and holding your posture in a way that really works out every tiny muscle. We also did TRX moves and then rotated to different stations for more full-body strength moves (ropes, ball throw, etc). I have already recommended this class to friends, colleagues...