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Rumble Boxing
4.8 ★★★★★ 43 Google reviews · Kickboxing gym in Denver, Colorado
Affiliated gym — reviews and the gym's own info suggest it belongs to a known kickboxing or boxing-fitness franchise or network (think 9Round, iLoveKickboxing, CKO, TITLE Boxing Club or Jabz). Franchise gyms run a consistent class format and are often a friendly, familiar place to start. If a specific brand matters to you, confirm it on the gym's own site.
Plan your first class
- Free trial or intro class most gyms welcome new members with a free trial or intro class — check their site or give them a call to book your first session
- Beginner-friendly all fitness levels welcome, including total beginners — no experience needed, and you get in shape by training, not before
- Cardio kickboxing classes high-energy cardio kickboxing on the bags and pads — a fun, sweaty workout built for fitness and weight loss, at your own pace
- Today see hours ·
- Website & schedule rumbleboxinggym.com — book classes and see the live schedule
- Phone (720) 727-0427
Hours
| Monday | 5 AM–7 PM |
| Tuesday | 6 AM–8 PM |
| Wednesday | 5 AM–8 PM |
| Thursday | 6 AM–8 PM |
| Friday | 5 AM–7 PM |
| Saturday | 8 AM–1:30 PM |
| Sunday | 8 AM–12 PM |
The classes they run
“I wanted to change up my workout and this is the perfect mix for something fun, new, and a great workout at the same time.”
“The coaches are motivating, knowledgeable, and welcoming to both first-timers and experienced boxers.”
“PLUUUUSSS ⬇️ If you show my Rumble CP IG Reel at the front desk, you’ll get a complimentary pair of Rumble’s official boxing wraps!”
Other martial arts here
“PLUUUUSSS ⬇️ If you show my Rumble CP IG Reel at the front desk, you’ll get a complimentary pair of Rumble’s official boxing wraps!”
What members say
“Nice instructor, a great mix of club style boxing+ strength+ core!”
“The coaches are motivating, knowledgeable, and welcoming to both first-timers and experienced boxers.”
“I’ve had a rough time getting back into consistently working out and this gym helped me get back on track with the high energy workouts.”
“I wanted to change up my workout and this is the perfect mix for something fun, new, and a great workout at the same time.”
“The staff was also really kind and helpful, and the gym was clean and well organized.”
“As a working mom this is such a great spot to come and connect as well as get a great workout in.”
From the reviews
'Simply the best' Rumble Boxing gym out there - no contest. I've visited other locations, but none come close to the sense of community, support, and positive energy this one brings. The coaches are motivating, knowledgeable, and welcoming to both first-timers and experienced boxers.
This is the best gym I have been to! The location is great! The staff is amazing and so nice and the facility is super clean! I love that the classes are in the dark and I feel like I have a trainer pushing me and encouraging me to keep going! I will be here for a very long time.
I had actually checked out another Rumble Boxing location before deciding on Northfield. After the Free Intro Class I was concerned because I did not feel I was in good enough shape to do it but felt very welcomed and appreciated.
Rumble Northfield is a solid addition to Denver’s fitness scene! The energy is high, the trainers are experienced and super engaging, and the class structure makes it easy to follow while still pushing you.
New to kickboxing? Start at Rumble Boxing
Rumble Boxing comes up as a beginner-friendly gym — noted on their own site. If you've never thrown a punch or a kick, that's exactly who a good beginners class is for. A few things worth knowing before your first week. First, you don't need to be fit or coordinated to start — you get in shape by training, not before it, and coaches scale every drill to you. Second, you won't be thrown into hard sparring — reputable gyms build the basics (stance, footwork, and punches and kicks on pads and bags) first, and any contact eases in gradually under a coach's control. Third, all fitness levels really are welcome — ask about a dedicated beginners or fundamentals class time so your first session is alongside others who are also starting out. Most gyms are happy to let you watch or try a class first, so reach out before you commit.
Your first kickboxing class at Rumble Boxing
Nervous about walking into a kickboxing gym for the first time? Almost everyone is, and good coaches expect beginners to come through the door. Here's what to know. What to expect: a typical first class is a warm-up, then drilling the basics — stance, footwork, and punches and kicks on pads or a heavy bag — not hard sparring. Go at your own pace and rest whenever you need to; no one will bat an eye. What to wear: comfortable athletic clothes you can move and sweat in, and supportive trainers. What to bring: water, and hand wraps and gloves if you have them — many gyms lend loaner gloves for a first class, so it's worth asking when you call. As you keep training you'll add your own gloves and wraps (and shin guards once you start sparring). Sparring is optional and eases in gradually, once your basics are solid. Arrive 10–15 minutes early to sign a waiver and meet the coach. It gets easier fast — most people feel far more at home by their third class.
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