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Stay Fly Muay Thai
4.8 ★★★★★ 129 Google reviews · Muay thai gym in Philadelphia, Pennsylvania
Authentic Thai — reviews and the gym's own info point to coaching rooted in Thailand's muay thai tradition. If lineage matters to you, ask where the coaches trained and about their kru.
Friendly gym offering Muay Thai classes for beginners and experienced martial artists.
Plan your first class
- Beginner-friendly all levels welcome, including total beginners — you don't need to be fit or have any experience to start
- Kids & youth classes kids and youth muay thai classes — built around discipline, focus, and confidence
- Private lessons private, one-on-one coaching available — a focused way to start or to work around a busy schedule; ask about availability and rates
- Fitness & conditioning muay thai fitness and cardio classes — a serious workout you can do without ever having to spar
- Fight team a competition team for members who want to test themselves as amateur fighters
- Today see hours ·
- Website & schedule stayflymuaythai.com — book classes and see the live schedule
- Phone +1 215-300-0031
Hours
| Monday | 6–7 am, 12–1 pm, 6–7 pm |
| Tuesday | 6–7 am, 12–1 pm, 6–7 pm |
| Wednesday | 6–7 am, 12–1 pm, 6–7 pm |
| Thursday | 6–7 pm |
| Friday | Closed |
| Saturday | 10–11 am |
| Sunday | Closed |
The classes they run
“This gym is a gem for anyone looking to train Muay Thai, whether you’re a complete beginner or an experienced martial artist.”
“I have witnessed him teach classes of 30 people and I have had private lessons as well.”
“Whether your goal is to get in shape, learn self defense, or compete, I'm confident you'll find that Stay Fly Muay Thai is the right place for you.”
“The head coach, Justin Greskiewicz, is incredibly knowledgeable, with years of experience as a professional Muay Thai fighter, and it shows in the quality of teaching.”
“Whether your goal is to get in shape, learn self defense, or compete, I'm confident you'll find that Stay Fly Muay Thai is the right place for you.”
Other martial arts here
“Stay Fly is the premier place to train Muay Thai/kickboxing in Philly.”
“The gym is great, new, spacious and well equipped - with 2 full-size boxing rings, lots of heavy bags, CrossFit-style athletic rig and plenty of mat/floor space.”
“You can do just the Muay Thai or add in some BJJ which is exceptional as well.”
“He trains elite fighters looking to become MMA or Muay Thai specialists.”
What members say
“If you’re looking for authentic Muay Thai training in a welcoming atmosphere, Stay Fly Muay Thai is the place to be.”
“With classes that focus on beginners, advanced techniques, strength & conditioning, fitness, Olympic lifting, and fight training, there's something for everybody.”
“Its a little unnerving going in and knowing absolutely nothing about Muay Thai, but everyone there is helpful and supportive.”
“With classes that focus on beginners, advanced techniques, strength & conditioning, fitness, Olympic lifting, and fight training, there's something for everybody.”
“With classes that focus on beginners, advanced techniques, strength & conditioning, fitness, Olympic lifting, and fight training, there's something for everybody.”
“The head coach, Justin Greskiewicz, is incredibly knowledgeable, with years of experience as a professional Muay Thai fighter, and it shows in the quality of teaching.”
From the reviews
You will not find a better or more experienced coach in Philly I have been training with Stay Fly Muay Thai now for 2 years and I can say I hve not had a bad experience with Justin as my coach nor with the other students that attend.
I'm re-reviewing Stay Fly Muay Thai now that it's moved the new location at Logic. This is still a great place to train and the new location is awesome. You can do just the Muay Thai or add in some BJJ which is exceptional as well. It's a complete system of martial arts. You can be hobbyist like myself, or compete.
if you are looking to take your exercise routine above and beyond, this is the place! I highly recommend getting into shape before taking any classes, however everyone is very helpful and will push you past your limits. The sessions are very organized and fast paced with great instructors.
This gym is a gem for anyone looking to train Muay Thai, whether you’re a complete beginner or an experienced martial artist. The head coach, Justin Greskiewicz, is incredibly knowledgeable, with years of experience as a professional Muay Thai fighter, and it shows in the quality of teaching.
New to muay thai? Start at Stay Fly Muay Thai
Stay Fly Muay Thai 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 program is for. A few things worth knowing before your first week. First, you don't need to be fit to start — you get in shape by training, not before it, and coaches scale the conditioning to you. Second, you won't be thrown into sparring — reputable gyms build fundamentals (stance, footwork, and the basic strikes of the "art of eight limbs") for weeks before any contact, and sparring stays optional. Third, all 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 muay thai class at Stay Fly Muay Thai
Nervous about walking into a muay thai 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 on pads and bags — not fighting. Rest whenever you need to; no one will bat an eye. What to wear: shorts or athletic wear and a t-shirt; you'll train barefoot on the mats. What to bring: water and hand wraps if you have them — many gyms lend gloves for a first class, so it's worth asking when you call. As you keep training you'll add your own gloves, wraps, a mouthguard, and shin guards. Sparring is optional and comes later, once your fundamentals 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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