09/02/2026
Want to know our membership options? We can break it down for you!
SLS Fitness
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Strength and Conditioning Center
Metabolic Effect, TRX, Spinning, Boxing, MMA, Strength Training, Boot Camp, Advanced Interval Training, Metabolic Effect Fat Loss, Pre/post Natal, Boxing bag, Warrior workouts, Beginner classes, Yoga, Pilates, and more!
08/31/2026
🔥 IT’S TIME TO LEVEL UP 🔥
Ready to get stronger, move better, and actually stay accountable this fall?
LEVEL UP is our 8-week body composition & performance program designed to help you push past plateaus and make real progress.
🏋️ 2 full-body training sessions/week
📈 Track your progress & performance
🔥 Build strength, improve body composition & boost confidence
🤝 Coaching + accountability every step of the way
And spots are already filling up! Some training times are FULL, and others are almost there. Don’t wait until your preferred time is gone.
Your next level starts here.
👉 Sign up at the link in bio!
08/27/2026
Testimonials series #1 Tammy and Lynn !! Thank you for all the fun you bring to our community and for supporting us for so many years 😁
08/25/2026
Staff fun fact part 3……..
Donny!! Drop your guesses below ⤵️
08/24/2026
We are cooking up some schedule changes for the Fall… what classes would you like to see on the schedule?
08/20/2026
Our Coach Spotlight Series continues with Coach Rachel!
Rachel always brings kindness, energy, and passion to all of her classes and clients!
Thank you, Rachel, for the effort and joy you pour into our community every single day.
Sound off in the comments and show Rachel some love!
08/17/2026
New class alert!! Ring Ready Boxing with Coach Kaitlyn 🥊 Pop in next Sunday to give it a try🔥
08/11/2026
What is Level Up? Swipe through to learn more! New sessions starting soon, stop by the desk to ask questions or sign up before it is full 💪💪
08/10/2026
Staff fun fact part 2…….
Matt!! Did you guess him? Tell us your guesses in the comments below 😁
08/09/2026
5 strength exercises to do while at work 💪💪 Drop your favorite below!
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Address
345 Chelmsford Street
Lowell, MA
01851
Opening Hours
| Monday | 5:30am - 8pm |
| Tuesday | 6am - 8pm |
| Wednesday | 5:30am - 8pm |
| Thursday | 5:30am - 8pm |
| Friday | 5:30am - 3pm |
| Saturday | 6:30am - 1pm |
| Sunday | 8am - 9:30am |