739 Main St. Evanston, IL 60202


What Makes D21 Evanston’s Best Personal Training Gym?

At D21 Fit Studio, we don’t believe in fast fad diets or quick fixes. Instead, we take a holistic approach to your body in the interest of providing solutions that ensure longterm fitness. We view your health and wellbeing as the main priority in our studio; and while we push your limits, we never cross lines, because we understand the importance of providing a safe space for you to return to and a gym that you feel comfortable training in.

We pride ourself on Integrity and strong Business Ethics, so we are pleased to announce that D21 Fit Studio has received
the Complaint Free Award from the Better Business Bureau
for 2017 and 2018!

Our 3rd year in a row and our team of excellent coaches is growing.

Dietrich 21 LLC BBB Business Review

What sets D21 apart, and ensures that more than 90% of our members have been with us for 3 years or more, is our unwavering commitment to the cause. Through our rigorous workouts and expert advice, we have proven that we are genuinely committed to helping you achieve the body of your dreams and assisting in revolutionizing your lifestyle.

We offer private, semi-private and group training sessions—in addition to a variety of classes. Our professional, expert coaches will work to sculpt your body over time, encouraging you to understand the importance of nutrition and learn to make active, permanent lifestyle changes.

Our unique team consists of nutritional and physical fitness experts who are truly invested in your success. We continually work to ensure that your health remains the utmost priority at all times, and we always remain at the forefront of the fitness world, keeping up to date with any new developments and utilizing our relationships with industry leaders.

D21 & Your Fitness Goals

D21 was opened in 2015 by fitness coach and ex-bodybuilder Dietrich Horsey. The significance in the “21” behind “D21 Fit Studio” comes from our unique training program designed by Dietrich Himself. The program aligns with the studies of Dr. Maxwell Maltz’s work on self-image.  The study shows that it takes 21 days to form a new habit.

This is the psychology behind Dietrich’s unique training program. The training program challenges clients through three different exercise phases over the course of 21 days.

Our comprehensive training program is designed to form life lasting habits to improve your overall health, wellness and quality of life.