Who We Are

Elite coaching with a human edge.

Sixth Union Fitness is a premium personal training environment built for driven men and women who want structure, accountability, and results that carry beyond the gym floor.

2016Founded
DTCSouth Denver Reach
6Fitness Components
The Sixth Union Standard

Personal comes before trainer.

Founded in 2016, Sixth Union Fitness was created to help people improve more than their workouts. The goal is to help clients build stronger bodies, better habits, and more ownership over the way they live.

The approach is personal, structured, and holistic. Training is built around the individual, not a generic template. Clients get coaching that accounts for movement quality, nutrition, schedule demands, mindset, and the realities of life outside the gym.

Sixth Union family
 
The strength of a person is not measured by the weight resting on their back, but by the power to lift up heavy hearts.

WHY IT WORKS
Why It Works

Built For High-Performing Adults Who Value Their Time.

Sixth Union gives busy professionals a clear coaching system built around consistency, accountability, and long-term results.

Book My Free Consultation

01

Structure

 

Clear programming, intentional progression, and coaching that removes the guesswork from training.

02

Accountability

 

A professional coaching relationship that helps you stay consistent when life gets busy.

03

Precision

 

Training that considers your goals, movement quality, nutrition, recovery, and long-term sustainability.

04

Community

 

A focused, high-standard environment for people who are driven, but still want personal connection.

Michael SuttonOwner | Coach
Founder Story

Coaching built on ownership.

Michael’s passion for health and fitness started with performance, but his mission has grown into something deeper: helping clients take ownership of their health, confidence, and long-term quality of life.

With a background in Exercise Science and Kinesiology, transformation coaching, Olympic weightlifting, nutrition, kettlebells, movement screening, soft tissue work, and personal training, Michael brings a broad coaching lens to every client who walks through the door.

B.S. Exercise Science & Kinesiology
Amazing 12 Certified Coach
Precision Nutrition Coach
USA Olympic Weightlifting Coach
RKC Kettlebell Instructor
FMS Level 1 & 2
NCSF CPT
NCSF Sports Nutrition Specialist
Wellness Perspective

Fitness, health, and longevity working together.

Shanni Sutton brings a proactive wellness perspective to the Sixth Union story. As a former athlete, fitness competitor, ICU nurse, and Nurse Practitioner, her experience connects training with health, longevity, and quality of life.

Her background helps reinforce the bigger Sixth Union message: the goal is not just to look better for a season. It is to build a stronger, healthier foundation for the years ahead.

Shanni SuttonCo-Owner | Owner of TRU Medical Aesthetics and Wellness
 
Sixth Union Mascot

Meet Huckleberry.

Huckleberry is the gym dog, morale director, and unofficial first impression specialist. As the "Gym Dog," I pride myself on making sure that everyone has to pet me as soon as they walk in. I love treats, belly scratches, and sitting as close as possible to you (to watch your form of course). Most of all, I love being told that I am pretty. It is my job to make sure you forget about all the other stressors in your life so that you can enjoy every moment of your training session from the second you walk through the doors until the time you leave.

He is not currently available for scheduling, but he will likely make sure you feel welcomed at your intro session.

South Denver Training Destination

Easy access. Premium coaching.

Near DTCClose to the Denver Tech Center and built for professionals with demanding schedules.

I-25 + E-470Convenient reach from Lone Tree, Highlands Ranch, Parker, and the South Denver area.

Start Here

Find the right path for your body, schedule, and goals.

Book a free introductory session to talk through what has not worked before and what kind of coaching path makes the most sense moving forward.

Schedule a Session
 
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.