Train Like a Colorado Athlete
Develop the strength, endurance, and skills to excel in your sport and play outdoors for life.

Train Like a Colorado Athlete
At Green Door Fitness, we understand Colorado athletes. Our owner Matt has climbed all 58 of Colorado's fourteeners and is currently training for more peaks. We know what it takes to perform at your best in the mountains, on the trails, and in your sport.
We workout hard at Green Door so you can play outdoors! Our athletic training programs develop speed, power, agility, and sport-specific conditioning that translates directly to your performance.
With trainers who are active in running, mountain biking, hiking, rock climbing, skiing, and cycling, we bring real-world athletic experience to your training. Our coach-on-floor approach means you get personalized guidance every visit—no appointment needed.
Sports We Train For
- Running (road and trail)
- Mountain biking
- Hiking and mountaineering
- Rock climbing
- Skiing and snowboarding
- Cycling
- Team sports
Being healthy is wealthy—and athletic training keeps you doing what you love for years to come.
What You Get
- Sport-specific programming
- Trainers who are athletes
- Performance-focused training
- Injury prevention
- Endurance development
- Outdoor lifestyle focus
Get Your Free Session
Try Athletic Training Denver at Green Door Fitness — no commitment.
Frequently Asked Questions
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.
Call (720) 541-7163