What are the opening hours?

Monday 5:30am - 8:30am 5:30pm - 8:30pm Tuesday 5:45am - 8:45am 5pm - 8pm Wednesday 5:30am - 8:30pm Thursday 5:45am - 8:45am 5pm - 8pm Friday 5:30am - 8:30pm Saturday 8am - 12:30pm Sunday 9:15am - 12:45pm

Rumble Boxing

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Rumble Boxing Assembly Square delivers boxing & strength group fitness workouts for all fitness levels.

Our boxing-inspired fitness boutique combines the sweet science of boxing with the transformative power of strength training in one seamless class. Each 10-round class is an explosive, full-body workout with HIIT, metabolic conditioning, and strength & cardio circuits. Reap rewards in every round® and rumble at your own pace.

10/27/2026

Milestone Madness is back at Arsenal Yards 🥊🎉 This crew just hit 100, 150, 200, 250, 300, and a massive 400 classes 🔥 Every one of those numbers is early alarms, sore arms, and showing up anyway. Swipe to celebrate them and drop some love below 👇 Who’s next?

10/26/2026

Halloween week schedule just dropped 🎃🥊 Themed rounds all week at Assembly Square and Arsenal Yards, costumes encouraged Friday and Saturday, and the Monster Mash is already sold out 💀 Swipe to find your round and book now 👊

10/24/2026

Something’s been lurking at Arsenal Yards 👀💀
Coach Jennifer Jennifer Lopez is throwing her final punches at Rumble this Saturday, and she’s going out with a MONSTER MASH 🎃🥊 The class is officially FULL, so if you’re in, come in costume and bring the loudest energy of the year 🖤
Let’s send her off right 👊
WatertownMA BostonFitness WhosReadyToRumble

10/02/2026

This scene aged better than the meat 🥩

50 years later, Rocky’s training montage still hits, the meat locker still makes us want to throw a few punches, and we’re still taking notes from the Italian Stallion 🐎

Now it’s your turn. The Icon Challenge is officially on: 10 classes in 31 days for a shot at Rocky 50th Anniversary merch + a Rocky-inspired NYC trip for 2️⃣

Join in the Rumble App 🥊

10/01/2026

“Every champion was once a contender that refused to give up.” 🥊 Rocky Balboa

And we’re off! 31 days, 10 classes, your road to Icon status starts today. Join The Icon Challenge in the Rumble App and get class 1 on the books 📲

Fifty Years. Nine Films. One Unmatched Legacy. Rocky 50th Anniversary. Watch Now on Prime.

Terms & conditions apply. See link in bio for full details.

09/29/2026

Still taking in everything you did this weekend 🥲🥊
To every studio, team, member, partner and person who showed up for Rumblethon, this one belongs to you 🖤

Now, about what’s next... we hope you’re ready for another round 👀

09/29/2026

See you later September 💪🏽
Our members continue to make it happen!

09/25/2026

Get your sleep tonight...bc tomorrow we push Hard Mode harder ‼️😮‍💨

The training is done. The teams are ready. Now we get to put all that work toward something bigger.

Rumblethon, we’ll see you tomorrow 🥊

09/24/2026

What you see: the fighter’s toughness, confidence, composure
What you don’t see: everything a fighter is carrying behind it

For a sport built around showing strength, speaking openly about mental health has challenged the idea that struggling and being strong can’t exist at the same time.

Strength isn’t just what you can take, it’s knowing when you don’t have to take it alone.

That’s what’s behind Rumblethon.
Showing up together, putting purpose behind the punches, and supporting The Jed Foundation as they work to make sure teens and young adults have the support they need when they need it 🖤🥊

09/24/2026

Hey Rumble Fam 🥊🌧️

Nor'easter season is here, and one is making landfall this weekend! A few quick reminders so you can plan ahead:

⏰ Cancel outside the 12-hour window. Our no-show and late-cancel policy will not be waived due to the storm, so check the forecast and adjust your bookings early.

👟 Bring a change of shoes. Help us protect the studio floor by swapping out wet or muddy sneakers when you arrive.

📲 We'll keep you posted. If the weather becomes a safety concern for members or staff, we'll let you know right away about any class cancellations. Keep an eye on your email, the app, and our stories.

Stay safe, stay dry, and we'll see you in the studio 💪

09/24/2026

Rumblethon’s gonna be a lot to take… 🥊

See what we did there?

Proudly sponsored by Intake Breathing

09/22/2026

Johnny Bananas knows a thing or two about a Challenge 👀

This one comes with gloves, a team, and a big reason to show up.

Rumblethon is THIS weekend, see you there 🥊

09/18/2026

The game wouldn’t be the same without them 🥊

Different countries, different generations, different ways of fighting, but from Durán and Chávez to Serrano and Canelo, these fighters haven’t just been part of boxing history, they’ve helped write it ✍️

09/16/2026

September is off to a phenomenal start 🥊

09/11/2026

This morning, the Rumble Boston team takes a moment to remember and honor all the lives lost 25 years ago today. We remember those who were taken, the families whose lives changed forever, and the heroes who ran toward danger.

We will never forget. 🇺🇸

09/10/2026

Every single time you walk through our studio doors — that's a moment worth celebrating. 💪

Your first class. Your 10th class. The day you finally nailed that combo. The PR you didn't think you had in you. The friend you dragged along who's now your workout partner. WE. SEE. YOU.
So many moments already this September — and we're just getting started. This is your sign to make your OWN Rumble moment happen. 👊

Haven't thrown your first punch with us yet?

There's never been a better time. 🥊
✨ 2 WEEKS UNLIMITED FOR $49 ✨
(*for friends who have never been to rumble)

DM us "49" and let's get you in the room.
See you in class 👋

09/08/2026

🏈 Football season is back, y'all! 🥊

Plenty of rumble before we watch the Patriots take on the Seahawks 👀

Wednesday Lineup

5v5: One Switch, 10 Rounds 🔥

📍 Arsenal Yards

🥊 6:00 AM — Coach Jen
🥊 4:30 PM & 5:45 PM — Coach Kevin (Beyoncé & Jay-Z 🎶)
🥊 Closing it out — 30-min Boxing Only w/ Coach Sandra

📍 Assembly Square

🥊 5:45 PM — Coach Katie
Come get your sweat on 💦

Link in bio to book!

09/06/2026

🎉 CARNIVAL. DANCE HALL. AFROBEATS. — with Coach Jen 🎉

One class. 9am.
One hour throwdown.
September 7th - Arsenal Yards

This ain't your average punch-and-lift session — she gives you permission to shake that ass 💃🔥 Come sweat, come move, come let loose.

🥁 A lil history for the culture: Carnival traces back to enslaved Africans in the Caribbean who took European pre-Lenten masquerade traditions and transformed them — blending them with African rhythm, dance, and celebration into something entirely their own. It became a way to reclaim joy, identity, and freedom through music and movement. Labor Day weekend carnivals (shoutout J'ouvert and the parades that follow) carry that same spirit forward today — resistance, resilience, and pure unfiltered celebration.

So this Monday, we move different. We throw down. We celebrate. 🇹🇹🇯🇲🇬🇾🇳🇬

Link in bio — spots are filling up 🔥

Address

301 Harold Cohen Street, Unit A
Somerville, MA
02145

Opening Hours

Monday	5:30am - 8:30am
	5:30pm - 8:30pm
Tuesday	5:45am - 8:45am
	5pm - 8pm
Wednesday	5:30am - 8:30pm
Thursday	5:45am - 8:45am
	5pm - 8pm
Friday	5:30am - 8:30pm
Saturday	8am - 12:30pm
Sunday	9:15am - 12:45pm

Telephone

+18579715078

Website

https://www.rumbleboxinggym.com/location/assembly-square?utm_source=google&utm_medium=referral&utm_campaign=yext&utm_ter

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