Information about SLS Fitness

Chelmsford St 345
01851, Lowell
+1 978-459-5959

Opening hours

  • Monday: 5:30 AM – 8:00 PM
  • Tuesday: 5:30 AM – 8:00 PM
  • Wednesday: 5:30 AM – 8:00 PM
  • Thursday: 5:30 AM – 8:00 PM
  • Friday: 5:30 AM – 4:00 PM
  • Saturday: 6:30 AM – 1:00 PM
  • Sunday: 8:00 – 11:30 AM

SLS Fitness: Opinions

5/5 (44 Opinions)
Top Rated Gym
Joseph Yennaco 2 years ago

Fantastic experience: I've been coming to SLS Fitness for almost a year, and its an fantastic one-of-a-kind gym with a great fun owner, excellent knowledgeable, helpful trainers and a community atmosphere. This is a class-oriented gym focusing on 30-minute workouts, and trust me you'll get more bang for your time out of these 30 minutes than an hour on a treadmill! Sherri (owner) mixes up the circuit and metabolic effect workouts, so you're always doing something new. That alone is worth the membership, since they have the workouts already figured out, all you have to do is show up. No workout planing needed, the less thinking for me the better. The MMA classes are a nice change of pace as well. SLS also offers a Farmer's Market on Tuesdays, shakes and supplements on site every day. Members also get the benefit of free or discounted lectures from time to time. Day care on site for cheap is especially helpful for me with 3 kids. There is also volunteer initiatives for those who want to get involved. Like I said, its a great one-of-a-kind place!

Pam O 2 years ago

Fantastic experience: The best.

A. Eliza 2 years ago

Fantastic experience: Sls is an absolute gem. A class focused gym with 30-minute classes that are varied and whoop your butt. I've been a member for over a year, and I love showing up and not stressing about what I'll do when I get there, cause it's new every time. You can go hard in Metabolic Effect or Weight Room, get killer cardio with Spin or Interval Boxing, stretch in Recovery or Arial Yogo, and get physical in Boxing or Jiu Jitsu. Plus the other classes that I don't want to try and remember. If you're looking for classes, this is the best place in the area by far.

Greg Cormier 2 years ago

Fantastic experience: Excellent facility. You will not find a better value in this area. Very knowledgeable and professional staff. You get a serious workout and you will be surrounded with good people who are serious about getting the most out of their workout. No judging or people sitting around using their cell phones. I have only been a member for 2 months and I love it. If you want to get the best in fitness and nutrition help, and you want results fast, this is the place to be.

Liza Cason 2 years ago

Fantastic experience: What's not to love? ... its not just a gym where everybody does their own thing - its a community of friendly people who always motivate, help each other but people take an interest in each other's lives... regarding the club? - the trainers are great, there's a wide variety of classes and staff is not only very helpful but quickly resolves any issues... come by & check it out, you will love the atmosphere and definitely want to join!

Nancy LaRock 2 years ago

Fantastic experience: I love all the employees they are so helpful and kind it's a great gym

kathy hirbour 2 years ago

Fantastic experience: I am 71 years old and o try to join lots of the senior workouts. They are great! Staff is super friendly and helpful if you have any questions about the equipment! They are concerned with your health in more ways than one!

Paula Drake 2 years ago

Fantastic experience: The best gym I have ever been to.

Bryan Brunelle 2 years ago

Fantastic experience: I have never been one to go to the gym as I never knew what I was doing and always felt like people were looking and judging me. That is until I was introduced to SLS Fitness. SLS Fitness has built up my confidence in so many different ways! I am happy to say I am down 30 pounds and that’s all from the support of fellow friends and coaches, the amazing classes and the friendly atmosphere. If you are looking for a gym that actually cares about you and your fitness goals don’t hesitate and come join SLE Fitness.

Tammy Quintal 2 years ago

Fantastic experience: Best gym ever! I have been a member for over 8 years and never want to leave. The trainers, facility, classes, equipment are all fantastic. What really keeps me coming back is the community! I have never been to gym that was such a supportive and fun environment. The trainers get to know you, the other members are friendly, and there is always something going on a fundraiser, a special class, a seminar, etc. It truly makes going to the gym an enjoyable experience!

jasmine mahotiere 2 years ago

Fantastic experience: Best gym by far ! I truly never saw results until I joined SLS. From the educational aspects, classes for all fitness levels and experienced coaches, this gym has me a customer for life !

Elizabeth Mailhot 2 years ago

Fantastic experience: SLS has an extremely friendly staff, and classes for all fitness levels!

Lynn Hansen 2 years ago

Fantastic experience: Hands down best gym ever! Phenomenal trainers and staff. Inviting environment. I’ve been a member for 8 years and I love it! Check it out, you won’t regret it.

Jasmine Clark 2 years ago

Fantastic experience: SLS is a business that you can trust! I’ve been going to the gym for about 8 years now, and the management and coaches are amazing and care about their clients. I learned especially during the past two years with the pandemic, that SLS does everything in its power to keep its staff and clients safe and well. I can’t say enough positive things about this gym and encourage anyone interested to check them out.

Amber Kovach 2 years ago

Fantastic experience: SLS Fitness has so much to offer everyone. Most classes are 30 minutes so I can fit it into my busy schedule. The classes are challenging and the coaches are all great at offering modifications when needed. The members are welcoming and supportive and I never feel intimidated even when I'm in a class of people who are further along on their fitness journey than I am. My personal training sessions with Coach Donny have truly been a game changer. I would suggest SLS to anyone whether you're a beginner or a seasoned athlete.

Michele Horn 2 years ago

Fantastic experience: I moved to the area in 2020 and had been searching for a gym to call home. After two brief memberships elsewhere I decided to give SLS Fitness a try. As soon as I walked in I knew it was what I had been looking for. Everyone is so nice and welcoming (shoutout to Billy!) and it has everything I need. The 30 minute classes are perfect for my hectic schedule and if I can't make a class I know I can pop in and use the open gym. They also offer a variety of class types so that you'll never get bored.

Diana Brazil 2 years ago

Fantastic experience: Best Gym in Massachusetts! Trainers keep you motivated and accountable. They always check in on you to make sure your ok!

Melissa Lanza 2 years ago

Fantastic experience: Being a member at SLS has changed my whole outlook on fitness and nutrition and even how to breathe to relax the nervous system. The coaches and staff are awesome and well versed in all areas. They are patient and help modify all the moves so that everyone can feel comfortable and be successful. I love to take a weekday class regularly on my lunch hour as I work less than 10 minutes away. I will never take a job that is too far from SLS! Also they have great sauna packages to detoxify and aid in recovery after a workout. There are lots of great instructional events and programs as well as private training sessions that have been beneficial. Love this place!

THERESA HORAN 2 years ago

Fantastic experience: I have been at SLS for a few years now. I love the friendly and encouraging atmosphere! The coaches are so knowledgeable and helpful. The variety of classes ensures that you never get bored with your workouts. I highly recommend SLS.

Kyle Dumont 2 years ago

Fantastic experience: This gym is unlike any facility you've ever gone to. From class-based strength and boxing classes to open gym, there is something for everyone at SLS. The coaches and the member community are top-notch. I have been a member for just over a year and it has changed my life.

Natalie Uribe 2 years ago

Fantastic experience: From the environment, to the coaches and the great variety of classes what more could you ask for? SLS is not just a gym, it's a great community, coaches know your name and support as well as guide you through a workout to make sure you get the best out of each class. I was never one to go to the gym regularly but now I look forward to each week. Thank you SLS for all you do!

Jen Whitson 2 years ago

Fantastic experience: I joined SLS about 3 months ago because I was bored with my old routine. The variety of classes at SLS means I always have options. The staff have all been super welcoming and know their stuff. If you’re looking for a place to workout that doesn’t have the big gym feel this is it.

Kevin Brunelle 2 years ago

Fantastic experience: I have been a member of SLS for the past 7 months after being recruited by a coworker. Switching from one gym to SLS was the best decision I have made. SLS is a family atmosphere where each coach gets to know you personally and ends up feeling like part of your own family. Not only are the coaches invested in your weight loss or healthy life changes but the fellow gym members get to know you as well and help each other out. The staff at SLS are all amazing and super helpful if you don't know where to start at the gym. I highly recommend SLS fitness to anyone looking for a gym to start getting healthy or just wanting to build some muscle tone.

Roberta Dowling 2 years ago

Fantastic experience: Award winning for a reason. The staff truly cares about you and your fitness goals. This space is special and there is a true community feel from the trainers and from other members as well. Classes are excellent, or come in and do your own workout whenever you want. Everyone has 30 minutes to invest in themselves and this is the gym to do it in.!! Hope to see you in class!

Ryan 3 years ago

Fantastic experience: Nothing but great things to say about SLS Fitness. The culture of this place is what keeps me coming back. I work in sales where my hours are very long and unpredictable and it's often hard for me to go there consistently. Every time my wife goes in without me, she always comes home telling me that the staff was asking about me. It's this kind of personalized attention that you don't get at the big gym franchises. It's not overly crowed and I really enjoy groupy atmosphere. You can tell everyone is there for the same reason and you have unlimited support if you need it. If your looking to take your workouts to the next level, I HIGHLY recommend looking into PT (personal training) with any of their coaches. I've personally seen huge progress since I started it 2 years ag

Veasna San 3 years ago

Fantastic experience: First time I’ve signed up for a gym. Staff are extremely friendly and great to work with! Billy and Olivia welcomed me to the gym in such a friendly manner which made it easy for me to become comfortable quickly. Coach Josh is awesome! He’s very nice and is willing to work with you to find the right pace tailored for you.

Gabriella Ramirez-Vasquez 4 years ago

Fantastic experience: Very clean n friendly staff

Anthony Tedesco 4 years ago

Fantastic experience: Best gym ev

McKray Jones 4 years ago

Fantastic experience: This gym offers a sprawling yet effective and controlled variety of classes at various skill levels for various fitness goals. There is a class here for you whether you like Combat Sports, Cardio, Power lifting, or Performance Athlete training. Classes are typically only 30 minutes so it's extremely easy to fit them into your schedule as they are spread across the entire day and focused. There is no locker room, but there is a shower and towels available to members.

Olivia 4 years ago

Fantastic experience: I have been a long time fan of this gym but faced with Covid challenges they’ve taken it to another level and upped their game. The equipment is even better, staff is still great, the classes are well coached and their safety protocols are outstanding.

Keandra cruz 4 years ago

Fantastic experience: Wonderful gym! Trainers are top notch, invested in other aspects of health, aside from physical fitness. The gym is always very clean, great equipment and a variety of classes for all levels of fitness. I would recommend anyone to go here!

Katherine Larson 4 years ago

Fantastic experience: Positive: Communication , Professionalism , Quality

Elijah Hawthorne 4 years ago

Fantastic experience: It puts me throw a lot it really fun the coaches are nice. I have a lot of fun th

Lindsay Taylor 4 years ago

Fantastic experience: The environment is bright, open and inviting. I was welcomed from the moment I walked in until the moment I walked out; everyone was incredibly friendly and gracious. I took a rowing class with Jordan, he was fantastic. I could tell he was extremely knowledgeable about fitness, but also about rowing. He was super helpful with technique (rowing is not my forte, but I do enjoy it). Also, given we are in covid, I must mention the gym was clean, Jordan was conciliatory to maintain social distancing when we had our masks off and everyone sanitizes their equipment thoroughly. Thanks so much for the workout SLS! I will definitely be back!! My only business suggestion is to put some signage on the building because you have a phenomenal space I think is being overlooked by some. I found your gym on the web, but if I was just driving by I would never ever notice it. I hope to see a huge sign when I return!! :)

Jordan the real 5 years ago

Fantastic experience: Everyone is so friendly and helpful

Bailey Cabrera 5 years ago

Fantastic experience: SLS? More like BEST-LS!

Chanel Varney 5 years ago

Fantastic experience: I'm going to miss this gym and these people SO MUCH when I leave town for good next week. I'll do my best to find something exactly like it in my new city, but geez that's a high standard to match. SLS Fitness has been my favorite gym I've ever been a part of. :) Nothing beats the passion and quality of the instructors and the convenience, flexibility, and fun of the classes!

Jeremy Bowman 6 years ago

Fantastic experience: Warning: Somewhat extensive review. SLS Fitness was the first gym that I've signed up for that had classes all day long and was practically the primary feature of the gym. The gym was very clean and the bathrooms were never in disarray with each visit. When you first sign up you will undergo a fitness assessment that checks for range of motion, balance, height and weight, body fat, etc. My assessor was Nick and he provided very useful tips for certain areas my range of motion was weak in. The instructors are fairly attentive and keep an eye on you to make sure that you attempt all exercises safely. Classes I have tried out were: Yoga, Boxing, Metabolic, Spin, Advanced MMA (Jiu-Jitsu), and Recovery. Shawn De-Paul and Larry Koontz do an excellent job teaching boxing fundamentals. The cardio boxing classes will always leave you a little exhausted but rewarded for the hard work put in (as long as you work hard). For Metabolic and Recovery I have taken the class with Alessio Angiolilli and the metabolic classes can be challenging and for recovery he has fun conversations with the members as everyone is winding down from working hard for the week. For Jiu-Jitsu be careful and wear mma shorts. I've tried a few personal training sessions. When setting up for one it seems that you are handed a personal trainer at random. Whether you can request for a different one I have not attempted. The price brackets are a bit rigid and do not offer much flexibility for a member to break down and control the sessions to their liking. If you're a pretty motivated person and know how to organize your own training, then personal training may not be for you. Regarding the health bar (I call it the health bar), during the weekday it provides a wide variety of shakes and other meals in the refrigerator. I'm not really sold on the shakes. They are a bit sweet for me and can be a little pricey. But, whoever that chef is that comes on the weekend and makes food is a godsend. She makes great healthy food and if you should see her (can't miss her uniform) I would highly recommend that you try her food. I often find myself being indecisive because there are a lot of good options there. Safety at the gym is good. Sheeri runs the establishment well and I hope that SLS Fitness continues to grow and expand because there is a lot to offer at this gym.

Daniel Walsh 6 years ago

Fantastic experience: Great place to work out.

Katie Pires 7 years ago

Fantastic experience: I love it here. Coaches are awesome, classes are great, it's my happy place.

Alton Phouvong 7 years ago

Fantastic experience: Visit for a dynamic sweating experience.

Brandon Okray 7 years ago

Fantastic experience: Great classes and friendly staff, would highly recommend. The short classes make it flexible for anyone's schedule. Just wish there was a water fountain so I could refill my own water bottle.

Janet Alman 7 years ago

Fantastic experience: I have belonged to one gym or another since I was a teenager but this is BY FAR the best experience I’ve ever had at a gym. All of the instructors are outstanding. Owner Sherri Sarrouf has assembled an all-star team of fitness pros who teach excellent, challenging, fun and SAFE classes for all abilities and interests. Multiple classes run just about every 30 minutes and the daily schedule is jam packed with a variety of classes. If you miss one class, chances are there’s another comparable one taking place soon OR you can work out on your own in one of the two weight rooms. In every class you will meet people of all ages and fitness levels from beginner to advanced. The staff (and members I met so far) are nurturing and helpful as if you are all part of a big team. Members receive a daily email with class schedules and articles containing the latest nutrition and fitness news. Check their website to see the incredible variety of classes they offer. This is the perfect gym. You will not be disappointed.

vikrant manne 8 years ago

Fantastic experience: .

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