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Rocky Mountain Flex Fitness
4.9 ★★★★★ 187 Google reviews · Kickboxing gym in Denver, Colorado
Spacious gym offering personal training, Olympic weightlifting, and yoga, plus a martial arts academy.
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
- Membership memberships run around $62.99/mo — many studios also offer class packs, drop-ins, and a discounted first month, so ask about new-member rates
- 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
- Private lessons one-on-one coaching available — a focused way to start or to work around a busy schedule; ask about availability and rates
- Competition team a competition team for members who want to test themselves in the ring — amateur kickboxing, muay thai, or K-1
- Today see hours ·
- Website & schedule rmflex.com — book classes and see the live schedule
- Phone (720) 550-6347
Hours
| Monday | 5 AM–10 PM |
| Tuesday | 5 AM–10 PM |
| Wednesday | 5 AM–10 PM |
| Thursday | 5 AM–10 PM |
| Friday | 5 AM–8 PM |
| Saturday | 7 AM–5 PM |
| Sunday | 7 AM–5 PM |
The classes they run
“Rocky Mountain Flex Fitness has something for everyone from the beginner to advanced user.”
“They offer some yoga and HIIT classes.”
Other martial arts here
What members say
“Rocky Mountain Flex Fitness has something for everyone from the beginner to advanced user.”
“Clean, plenty of room, well-maintained equipment, and everything you could ask for in terms of accessories, bars, machines, and free weights.”
“Every dollar actually feels worth it.”
“The equipment is high-quality, the environment is motivating, and the staff is friendly and knowledgeable.”
From the reviews
Rocky Mountain Flex was my home gym for the last year! I spent upwards of 20-25 hours a week prepping for my first physique competition here! As a fitness professional and a bodybuilding competitor this gym had everything I needed to THRIVE 🙌🏼 the posing room, the equipment, the natural lighting, the turf, the…
At 56, I'm no spring chicken. I've been going to gyms and lifting since I was 12. I travel and check in to gyms in cities across the US. I've seen almost everything. Suffice it to say, if I were to design the perfect gym, I don't think I could top RMFF. This place is amazing!
I was a member here for 2 years and I cannot recommend this gym enough. Taking a little break, and decided to pause my membership and the staff was very responsive and friendly. I've always had bad experiences pausing/cancelling but this gym was so friendly about it.
Such a great gym. Everyone is doing their thing and its got soul and community that the cheaper mega gyms lack. Seems like there are a lot of ways to get involved with the gym community if you're into that. I prefer to keep to myself and was never ever bothered. Bliss.
New to kickboxing? Start at Rocky Mountain Flex Fitness
Rocky Mountain Flex Fitness 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 Rocky Mountain Flex Fitness
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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