SLS Fitness in Lowell

345 Chelmsford St, Lowell, MA 01851, United States

★★★★★
(134 reviews)
Class Types: Fitness center Gym

About

SLS Fitness is one of the top Strength and Conditioning Centers in New England and we believe in changing the way you feel, play and move. SLS is dedicated to supporting your holistic fitness journey for all ages and levels with a “whole-body wellness” approach through expert training & classes. With a schedule of over 180 classes/week you can choose from Boxing, Yoga, Barre, Meditation, Metabolic, Strength & Conditioning, Speed & Agility, and so much more. SLS also offers a Rock Steady Boxing program for Parkinson’s patients. To support your overall wellness needs we have Physical Therapists, Chiropractic services and a café, specializing in plant based foods, organic protein shakes and supplements.

Website
slsfitness.com
Address
345 Chelmsford St, Lowell, MA 01851, United States
Plus Code
JMJH+64 Lowell, Massachusetts, USA
Time Zone
America/New_York

Business Hours

Monday
5:15 am–8 pm
Tuesday
5:15 am–8 pm
Wednesday
5:15 am–8 pm
Thursday
5:15 am–8 pm
Friday
5:15 am–6 pm
Saturday
5:30 am–2:30 pm
Sunday
7:15 am–2:30 pm

Services

From the business
Identifies as women-owned
Service options
Online classes Outdoor services On-site services
Highlights
Active military discounts
Accessibility
Wheelchair-accessible car park Wheelchair-accessible entrance
Amenities
Gender-neutral toilets Sauna Toilet Wi-Fi Wi-Fi Swimming pool
Crowd
LGBTQ+ friendly Transgender safe space
Planning
Appointment required Membership required
Children
Good for kids

Reviews

4.8
★★★★★
134 reviews

Most Mentioned

classes (22) personal training (12) community (12) boxing (9) atmosphere (7) feel (6) metabolic (4) schedule (4) equipment (3) sauna (3)
5 stars
117
4 stars
12
3 stars
2
2 stars
2
1 stars
1
★★★★
March 16, 2025

Not happy with new plans and pricing. Hidden policies, not straight forward with what they offer. I love this gym and the sessions they offer, but it has been extremely difficult to switch between the programs or at least they're making it harder for me to continue with them. The Gym should have a membership commitment to the Gym and not to a "program" they offer, especially when we are looking to add additional services. I had a 3 month commitment plan for personal training and just completed it, to continue PT, I requested to also add regular membership so I can use other classes. However, they ask that I rejoin a new plan with 6 months commitment again just to add regular classes along with my PT sessions. I requested that they keep the initial commitment of 3 months that I already completed and may be add 3 months more to the new plan that I want to switch to (so I can take regular classes along with PT). I left PT behind and opted for a month to month unlimited flexible membership plan with no commitment, paying an extra $40 for no commitment plan. Now, they say i can't use sauna while it is explicitly included in their plans that "both (commitment and non-commitment plans) include" unlimited sauna. They want me to have a recurring payment in place in order to use sauna for the current month I paid for. I don't understand why a no commitment plan that says sauna is included needs a recurring payment in place in order to use what I paid for in the current month.

★★★★★
August 27, 2024

I love this gym! I’ve been a member here for about 7 years, and go consistently. SLS is oriented around classes: boxing, yoga, strength, metabolic effect, spinning, warrior workouts, stretch & mobility, etc. - which are included in the membership. The variety gives you a lot more movement patterns and challenges so you won’t get bored or get in a rut. The small classes generate a great community feel and the members are friendly and there’s a feeling of camaraderie. The coaches are incredible! You’re being trained by the best, and they’re great people too. Rather than going to a gym and staring at a screen on a piece of equipment, you’ll engage with other people, get a great workout, learn, and enjoy being there.

★★★★★
August 23, 2024

My partner and I moved to a new area and were searching for a gym to join when we stumbled across SLS. Fast forward, I've been a member for about a year now, and I can confidently say that I'm here to stay for the long haul. The sense of community at SLS is truly something special - you’ll find the support and camaraderie you need here. The coaches are EXCEPTIONAL. They are knowledgeable and encouraging, and they go above and beyond for the members. The gym is well-equipped, clean, and the atmosphere is always buzzing with positivity and motivation. Joining SLS has been one of the best decisions I’ve made, and I can’t recommend it enough!

★★★★★
August 21, 2024

I have been a member of SLS Fitness for many years. I joined a few others before finding SLS, but I never ended up staying. The difference for me was the feeling of being part of a community where the coaches truly care about you. I personally need to be in a class based gym to keep me motivated. The class choices are extensive and it’s fun to try something new now and then. SLS also offers Zoom classes as well as SLS TV that provides several pre-taped classes if you can’t make it to the gym. I highly recommend giving SLS Fitness a try.

★★★★★
August 21, 2024

This wellness and fitness center will transform your life! Hands down, it is a phenomenal place to workout, recover, and grow alongside other community members. The coaches are significantly knowledgeable and are invested in your wellness journey. The classes are engaging and fun, and personal training sessions are beyond amazing. I do personal training with Frank who is FANTASTIC and I highly recommend him. Shout out to Colleen as well---I love her boxing classes which have also been a highlight of my SLS experience.

★★★★★
August 9, 2024

I’ve been a member of the SLS community for many years now! This place is so much more than a gym. The trainers all take the time to personally get to know their members and you will quickly become friends with the other members you take classes with! The trainers are so knowledgeable and cater each workout to your individual needs. I cannot recommend this gym enough!

★★★★★
August 5, 2024

I was a complete gym phobic before joining SLS FITNESS. From day one, welcomed and shown around I felt the sense of community that’s a driving value here. I was a complete beginner, and was made immediately comfortable with the intake process, and in subsequent classes. The coach led, organized classes are the perfect format for me and I’m constantly learning and progressing under the remarkable coaching staff. It’s clear that these folks are not just fitness professionals, but they are also fiercely dedicated to their craft. SLS isn’t just a gym, it’s a community. It’s a community dedicated to teaching, learning, acceptance, and charity, and I could not recommend it any higher!

★★★★★
July 29, 2024

SLS is a fantastic gym that definitely has a community feel. I love how they offer so many different types of classes throughout the day, so you can always find a time to get a workout in. The coaches show you the proper techniques and form during each class as well. I've been members of other gyms and SLS is hands down the best.