At D21, we will help you establish a sustainable synergy of effective training and proper nutrition to bring you to your BEST and keep making it better!
As a professional expert fitness studio, we allow both current and prospective clients the opportunity to invest in their long-term health and perfect their bodies through our comprehensive service, which includes personal training sessions, nutritional advice, and targeted treatments.
Here at D21, we find success through our simple philosophy and methodical approach that allows our members to enjoy their lives — while remaining healthy and fit.
We are more than just a gym: we are a fluid studio that will refine our services to fit your specific needs. When you walk through our doors we fully commit to you and your success, no matter how difficult the task at hand. Our team is ready and waiting to help you find long-term fitness – are you?
“If it doesn’t CHALLENGE you, it doesn’t CHANGE you!” – Unknown
To spread awareness of the importance of a comprehensive, sustainable, fit, and a fun healthy lifestyle.
To deliver optimal results based on individual priorities that make a lasting difference in our clients’ lives, and to promote active involvement within the community.
To educate and engage men and women with varying needs, ages, and diverse backgrounds to expand their physical fitness capacity, and to be extraordinary in their own way.
To reach and inspire 365+ new clients in 2019, and to be recognized as the premier fitness environment in our community.
D21 Fit Studio is committed to offering various high-quality programs with customized training to promote fitness and a sustainable healthy lifestyle.
- Utmost Integrity
- Continuous Innovation, Development, and Improvement
- Open Communication
- Active Community Involvement
- Emphasis on Health and Happiness
- Teamwork and Collaboration
Dietrich Horsey has dedicated more than 20 years to helping others feel, be and live healthfully. As a health expert and fitness trainer, he works with successful and professional clients who want to achieve their fitness goals.
Dietrich specializes in corrective exercise, with a background in bio-nutrition. Converging programs that focus on correct body mechanics and healthy diets are the basis for his success and the successes of his clients.
Dietrich has developed and implemented customized fitness programs and nutritional plans for countless individuals of various ages, genders, ethnicities, and ability levels. He uses his broad knowledge of fitness, health and nutritional topics to teach, train and consult his clients toward living a healthier lifestyle. He provides uncompromising professional excellence so that his clients will learn to honor their health, nurture their bodies and live their most extraordinary lives. D21, Dietrich’s health and fitness training and consulting firm, takes a holistic approach and focuses on the powerful link between training and nutrition
Dietrich Horsey has dedicated more than 20 years to helping others live healthfully. Dietrich specializes in corrective exercise, with a background in bio-nutrition. Dietrich has developed and implemented customized fitness programs and nutritional plans for countless individuals of various ages, ethnicities, and ability levels. He uses his broad knowledge of fitness, health, and nutritional topics to teach, train and consult his clients toward living a healthier lifestyle. He provides uncompromising professional excellence so that his clients will learn to honor their health, nurture their bodies, and live their most extraordinary lives.
“Everyone likes to work on their favorite body part but it is important to develop all body parts to create a well balanced strong, powerful, and functional machine.”
David Bruce Martin is an ACE Certified Personal Trainer. David is bilingual in English and Spanish. David is also a lifelong Evanstonian, graduated from ETHS, and after starting a family he moved back to raise his family here. He is a busy working father: he has two kids, a 21-year-old son, and a 13-year-old daughter. David has always been into fitness, played soccer since he was 5, and he ran 6 marathons, so he decided to make his fitness a priority. After losing 30 pounds and investing in the fitness community, he made the choice to make a career out of it. David is excited to be a part of D21, and he is looking forward to meeting you all.
“Nutrition is so key to your health and fitness and especially for weight loss. Think of food as fuel to energize your body and to rev your metabolism. I am available to offer advice and answer questions about how to best fuel your body so you have the energy for your workout and all day long.”
Stephanie Mangrich is a wife and mother of three, who loves to run. She has a bachelors of science in Athletic Training, from Trinity International University. Her background includes working as a medical assistant/ athletic trainer for a group of orthopedic doctors. She took a break to raise a family and is now returning to the field. She enjoys watching people get stronger and do things they didn’t think they could do before. She likes to challenge her clients to break barriers, so schedule an appointment with her and start pushing your limits!
“The results started coming and they haven’t stopped.”
Senior Scientist, Abbott Laboratories
“Dietrich has created a new me inside and out.”
“These workouts were much more functional, and challenged my body in a way that it hadn’t been before.”
“Dietrich works continuously to make himself a better trainer.”
Tax Partner at Brown, Kaplan & Liss, LLP, Evanston
“I’m proud of my accomplishments under his care.”
I’m lucky to work with a trainer like Dietrich, and I’m proud of my accomplishments under his care.
“He is always devising new, interesting, effective, and YES, FUN workouts.”
“I have not only reached my goal, but am now surpassing my goals beyond what I had imagined.”
Montessori Directress Ages 3- 6
“Dietrich is the LEGMASTER, believe me!”
Ed.D. English professor, Truman College - City Colleges of Chicago
“I am starting to enjoy working out. Shhh…don’t tell my wife.”
“I was stuck and unhappy with how I felt in my body”
– Emily N. Halliday
“I have been an athlete all my life, but I have never been this strong!”
Physical Ed. Instructor
“His skills in individualizing the routines and changing them frequently, keeps it interesting and effective.”
“D has gotten me to limits I did not know I could attain, and keeps raising the bar for me! Thanks, D!”
Dr. Manoj Mehta
NorthShore University Health System
“I have found a great trainer, Andreea!”
Upbeat music reverberates throughout the gym. A crowd of people all hurry to switch from one exercise to another. Some people easily handle thirty seconds of whichever part of the…
Are you struggling with self motivation? Having a hard time getting yourself to your regularly scheduled workouts? Finding more and more reasons to cheat on your healthy diet?
So you’ve made a goal for yourself to become more active, huh? Well, this is good. What is it you are specifically trying to accomplish? Are you trying to lose…
Pump iron for weight loss! It is true that cardio is great for weight loss. Whether you are in a HIIT class, working out on an elliptical, or out for a…