The Only Denver Gym with a Trainer on the Floor. Every Visit
Do the plan. Get results—or your money back with our 28-Day Personal Training Pass.
Coach-On-Floor
Every visit, expert guidance at your level.
Custom Plan
Tailored program to hit your goals fast.
No-Ego Vibe
Friendly, supportive environment for all levels.
How It Works
Book a 10-Min Call
Schedule your pass start quickly and easily.
Day-1 Assessment
Meet your coach and set your custom plan.
Train 3-5x/Week
Get floor coaching and check-ins for results.
Meet Our Trainers
Our NASM certified trainers are here to guide you every step of the way
Matthew Hammel
Owner / Trainer
Matt is a native Coloradan who grew up in Denver. His first passion was football but a hamstring injury forced him to pursue other avenues for his love of physical challenges.
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Tim
Trainer
Denver's own born and raised, Tim has always been on the move—whether it was tearing up the football field, dominating on the wrestling mat, or even throwing punches in the boxing ring.
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Cat
Trainer
Cat is a Colorado native, born and raised in Alamosa. She grew up in a very athletic family, playing basketball all 4 years of high school.
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Devin
Trainer
Born and raised in Lafayette, Colorado, Devin discovered his passion for health and fitness through a supportive CrossFit community.
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Caroline
Trainer
Caroline is a NASM Certified Personal Trainer and Nutrition Coach. With a large background in team sports, an active lifestyle has always been a cornerstone in her life.
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What Our Members Say
"The coach-on-floor approach is what sets Green Door apart. Every time I walk in, there's a trainer ready to guide my workout. I've finally seen real results after years of struggling on my own."
"Matt and his team meet you where you are. No judgment, just encouragement and expert guidance. I've built strength I never thought possible and even started hiking 14ers!"
"I love the no-ego vibe at Green Door. Everyone is supportive, the trainers are incredible, and the classes like R&R and Death Row are challenging but fun. Best gym decision I've ever made."
Frequently Asked Questions
Everything you need to know about training at Green Door Fitness
Visit Us
2404 East Colfax Ave, Denver, CO
Parking available, easily accessible via public transport.
Start Your 28-Day PassReady to Get Started?
Your first training session is completely FREE - no strings attached!