What are the 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

SLS Fitness

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Strength and Conditioning Center
(649)

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!

11/05/2026

Shoutout to our amazing team who spent last Friday at our annual staff training! We went over ways to better support our community, connected, laughed, and competed.

We are so grateful for this team and all the passion they have for not only fitness and wellness, but also supporting the SLS Fitness community!

11/03/2026

Billy is getting hit with a deal so big you wouldn’t even believe it! Save the Date for our Annual Sale on Friday, November 20th - Sunday, November 22nd!

11/01/2026

Core and Posture Exercise of the Week: The Farmer’s Carry! Try three sets walking back and forth

10/30/2026

A huge shout-out to our Rock Steady Boxing for Parkinson's Community for representing SLS Fitness at the Michael J. Fox Foundation for Parkinson's Research Walk!

10/29/2026

Let’s knock out cancer! Our first ever Box-a-Thon style class for Tough Warrior Princess is this Sunday, November 1st at 9:30am-10:30am. Donate what you can to enter!

10/28/2026

Why the Fall Flavors are so good for you: Sweet Potato, Squash, Pumpkin, Cinnamon, and more! What’s your go-to Fall recipe?

10/26/2026

A Halloween Sound album by SLS is coming to streaming soon😂 Who do you think did the best?

10/26/2026

Exercise/Warm up for Weak/Achy knees: Banded Reverse Nordics

These are a staple move in not only most of my client programs but also my own!

▪️These are a great way to warm up the knees for squatting/lunging or just some good old WD40 for the knees!
▪️ You can progress this movement using lighter and lighter bands and eventually into no band assistance and eventually into even holding weights!
▪️ The key to this is to keep your hips in hip extension the whole time to truly get the most out of this movement!

10/21/2026

Shoutout to our Boxing Coaches🥊

Coach Kaitlyn
Coach Riley
Coach Sarah

Thank you for bringing great energy, passion, and expertise to our boxing department!

10/20/2026

Scroll to learn some great Pelvic health tips from our UMass Lowell third year Physical Therapy student interns!

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

http://www.slsfitness.com/

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