●  ELITE PERSONAL TRAINING IN LONE TREE AND DTC

STRENGTHEN YOUR MIND. TRANSFORM YOUR BODY.

 

A high-performance personal training experience for busy professionals, parents, and anyone ready for structure, accountability, nutrition, and results that carry into every part of life.

 
A12
Denver's #1 physique transformation program, redesigned as a premium lead path.
 
PERSONAL COMES BEFORE TRAINER.
Elite coaching with the accountability most people are missing.
MORE THAN YOUR PR
BUILT FOR THE PERSON BEHIND THE PERFORMANCE.

Sixth Union Fitness is not positioned like a generic gym. It is a premium coaching environment where strength, nutrition, mindset, accountability, and community work together.

Personalized

Programming is designed around your goals, schedule, movement quality, and the reality of your life outside the gym.

Accountability

Coaching support that helps you stay consistent when motivation dips. We win, when you blast past your goals.

Community

A focused training family that supports goals in and out of the gym, without losing the high-standard feel of private coaching. 

SIXTH UNION
 
 
OUR PHILOSOPHY
Personalized programming for the best version of you.

Most fitness programs are built for injury-proof 20-year-olds who get results just by eating a salad. You need something better. Sixth Union built a gold-standard periodized training system around the six components of fitness. It's personalized, holistic, and designed for CEOs, parents, and anyone done with the endless start-stop cycle. You bring the commitment. We handle the rest.

ABOUT US
SERVICES
MULTIPLE PATHS. ONE STANDARD.

Sixth Union Fitness is not positioned like a generic gym. It is a premium coaching environment where strength, nutrition, mindset, accountability, and community work together.

PRIVATE TRAINING
One-on-one coaching for clients who want attention, precision, and a plan built around them.
 
Learn More
SEMI-PRIVATE
A focused small-group environment with coaching, structure, and community.
 
Learn More
AMAZING 12 PROGRAM
A 12-week transformation program with personalized workouts, exact nutrition guidance, cardio, and progress tracking.
 
Learn More
ONLINE + NUTRITION
Training and nutrition support for people who need structure beyond the gym floor.
 
Learn More
★ ★ ★ ★ ★
REAL RESULTS COME FROM COACHING PEOPLE, NOT JUST COUNTING REPS.

Cassandra lost 88 lbs in 10 months and credits the partnership, trust, and encouragement she found at Sixth Union as the difference between starting over again and finally making it stick.

START YOUR TRANSFORMATION 
WHO WE ARE
ELITE COACHING WITH A HUMAN EDGE.

The current site has a strong personal story. This mockup gives the coaches more polish while keeping the warmth that makes the brand feel personal.

 

 MORE ABOUT US

Michael Sutton
OWNER
Coaching built around ownership, education, performance, and helping clients create results they can actually sustain.
Shanni Sutton
NURSE PRACTITIONER
A wellness perspective that connects fitness, proactive health, longevity, and looking and feeling your best.
Huckleberry
SIXTH UNION MASCOT
The gym dog, morale director, and unofficial first impression specialist.
 

 

 

START WITH A FREE CONSULTATION
FIND THE PLAN THAT FITS YOUR BODY, YOUR SCHEDULE, AND YOUR LIFE.

Book a free introductory session to talk through your goals, what has not worked before, and the best path forward with Sixth Union Fitness.

 

FREE CONSULTATION   EXPLORE SERVICES

 
START YOUR NEXT STANDARD
Ready to train with purpose?

Whether you need private coaching, semi-private training, nutrition support, or the Amazing 12 Program, Sixth Union gives you the structure and accountability to move forward.

A premium coaching environment where strength, nutrition, mindset, accountability, and community work together.

CONTACT
Hours
Mon-Fri: 6am-8pm
Sat: 6am-1pm
Location
Serving Lone Tree, DTC, Highlands Ranch, Parker, and South Denver
© 2026 Sixth Union Fitness. All rights reserved.