Best money I have spent on myself! You have one body and taking care of it is what SLS is all…read moreabout. The owner is so friendly and knowledgeable and the staff is amazing. I Love doing personal training with Holly and the classes are great. There is something for every skill level.

Excellent classes , has Parkinson's classes, 65 + classes and classes for everyone ,also has one on…read moreone classes.

Nice enough people, but classes huge with one instructor. More expensive than most schools, and…read moredon't let you put a month on hold without some elaborate proof of injury. Oh also I was a bit concerned about how often the mats got cleaned. I didn't see them spraying down in between classes.

Great place for kids to let out steam friendly environment. Coaches work really work with children…read more Make sure you got good sock on shoes are forbidden in dojo..lol

Here's the short version: if you expect more from a gym, regardless of your level, join Skill of…read moreStrength (SOS) right now. The Details: Several years ago I switched from traditional conditioning (machines, rote freeweight exercises) to functional training. If I only knew sooner... The trainer who originally taught me and my kids moved out of reach. Since then I've engaged in a pretty arduous search and ended up at SOS. As far as I can tell, it's one of a handful of gyms of its kind in the Boston area, and it happens to be at 73 Princeton St., North Chelmsford MA 01863 (https://www.skillofstrength.com). SOS does a terrific job of translating cutting edge methods to well structured and original routines that can be followed by all levels of ability. On one hand there's a somewhat more casual crowd that does a modified version of the day's program (I'm in their MOVE class) and they seem quite content. I'm absolutely, 100% all for that. At the same time, there's another crowd that's always pushing for the next level. Despite the wide ranging audience, SOS underscores the experience with some very subtle social norms - very healthy, and it creates a great vibe. My first experience with SOS was sending my high school aged son through their COMPETE program. It accomplished everything I was hoping for - measurable gains in quickness, strength, cardio, reinforcement of footwork, increased confidence, and familiarization with a vocabulary that athletes require if they're going to progress. All in a personal, incredibly positive environment. Why SOS works for me: starting in my teens and stretching into my late 30's I spent a good portion of time working with skill coaches and strength & conditioning coaches. Together, they made a huge difference in my progress. I don't play a sport anymore, but I still want a technical workout oriented toward increased fitness. SOS delivers in spades. I'm a bug for technique - I actually believe that 5 pounds done right is better than 50 pounds done wrong. As a result I'm constantly asking questions, getting terrific guidance, and no one's lost patience or interest - instead, they seem to be totally into it. SOS has also taught me additional, helpful routines for balance (which are actually fun, and this stuff is supposed be fun), and I'm still pulling myself together on their footwork drills - happily. If you have kids or student athletes who would benefit from a thoughtful, engaging workout, or if you're looking for something different and well structured, or if you simply burn for a good workout, SOS is a terrific place.

Great place to train, with great instructors. If you are looking for a place where the coaches pay…read moreattention to detail, come to SOS! You will not regreat it! Raphael

Great place for adults and kids. Family friendly. The owners Andrew and Michelle Rollinson are…read morefriendly, helpful, with students and staff.

There is magic here. I am not a connoisseur of martial arts…read moreacademies, as this is our first experience with a TKD studio. However, Renshi Andrew at Alpha is a rare and special talent as an educator. He has boundless focus, patience and perseverance with all of the students. He is a big bear of a guy who captivates the kids, draws them out of their shells and keeps them in motion. At the same time, he never lets up on the message of control, discipline and respect. He has made all the difference for our son. Andrew and Michelle have built a warm community around the studio, which gives all of the students and families a familiar place to come, gather, watch and learn. If I was more selfish, I'd tell you to stay away so we could keep them to ourselves, but somehow I know there is enough to go around.

NDB Fitness is more than a gym--it's a true gym family. The 30-minute classes are fast-paced,…read moremotivating, and incredibly effective. My strength has grown exponentially, and I just completed my first DEKA Strong, something I never thought would be possible. Frank is incredibly responsive and genuinely invested in helping you reach your personal goals. Huge shoutout to Annalecia, Kelly, and Joanne--they're powerhouse trainers who push, motivate, and support you every step of the way. If you want real results, high energy, and a community that truly has your back, NDB Fitness is the place to be.

This is a fantastic personal training gym with great trainers and also many different classes. They…read morehave a trainer for most types of workouts and adapt to what people need with their strength and conditioning. Highly recommended and convenient spot for the greater Tewksbury/Wilmington area!!