SLS Fitness

SLS Fitness Strength and Conditioning Center
(650)

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!

09/10/2026

Testimonials series #2 Mariza!! Thank you for all the fun you bring to our community and for supporting us for so many years 😁

09/09/2026

Our boxing coaches showing off what you can learn in any of our boxing classes🔥🥊

09/02/2026

Want to know our membership options? We can break it down for you!

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?

Our Coach Spotlight Series continues with Coach Rachel!Rachel always brings kindness, energy, and passion to all of her ...
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🔥

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

Telephone

+19784595959

Website

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