TALK YOURSELF INTO IT!
739 Main St. Evanston, IL 60202
773-571-8844
workout@d21.fit
Welcome to D21 Fit Studio: Home of the Fitness Fixers

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. We implement a “good, better, best” system 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

Our Mission 

To spread awareness of the importance of a comprehensive, sustainable, fit, and nutritious 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.

Our Vision

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 2018, and to be recognized as the premier fitness environment in our community.

Core Values & Culture

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
  • Mission-driven
  • Emphasis on health and happiness
  • Teamwork and collaboration
Goal

No matter what your training goal – weight loss or gain, increased body and core strength, and/or improved alignment and flexibility – our comprehensive approach will help you achieve and sustain your healthy lifestyle goals.

Dietrich Horsey
dietrich

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

Find out more about Dietrich
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Area(s) of interest:

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Our Trainers
DIETRICH HORSEY / OWNER
Trainer Dietrich

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.

Dietrich’s Tip
“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.”

Haley Perry
Trainer Haley

Haley graduated from Grand Valley State University in 2015 with a Bachelor of Science in Exercise Science. While in college, Haley participated in dancing and intramural volleyball. She also did fieldwork in the CrossFit scene as well as Sports Performance. After graduation, Haley moved to Central Wisconsin, where she worked as a personal trainer at Anytime Fitness. There she worked with clients ranging from 20 to 65 years of age. She has experience with private training, semi-private training, as well as group classes, with a certification in personal training and CPR. Haley has recently relocated to Evanston, IL, where she has found her place at D21. She looks forward to what the future holds and hopes to change the life of many along the way.

Haley’s Tip
“Embrace the journey and celebrate the small victories! After all, it is small changes that add up to big results.”

Andreea Mihaela
head shot

Andreea is originally from Romania but has lived in Chicago since the age of five. She graduated from Loyola University of Chicago in 2017 with a Bachelor of Science in Exercise Science. She has had a lifelong involvement with sports, including competitive soccer, lacrosse, and basketball. Andreea was a personal trainer and a group fitness instructor in Panama City, Panama in 2016. Andreea has experience coaching clients from 10-90 years old. Andreea also holds CPR certification. Andreea currently teaches semi-private group fitness classes at D21 focused on strength, functional, and cardio exercises. She is excited to continue to grow and help clients achieve their goals here at D21.

Andreea’s Tip
“Always breathe, especially through the most difficult part of the exercise. You do not want to cut off blood and oxygen flow to your muscles. During strenuous exercise, take deep breaths and push through it. During stretches, also take deep breaths and relax!”

Feedback from our clients
dan
“The results started coming and they haven’t stopped.”
Dietrich is the real deal. I’ve been weight training since I was a teenager, but this past summer, I decided to commit to achieving something I’ve always wanted and never had: a six pack. After 5 months of personal training with Dietrich, I’m in the absolute BEST shape of my life. I’ve shed almost 5 inches off my waistline, 25 pounds of fat, and packed on several pounds of muscle. Now, I just need to find a good tailor!

Dan Caspi

Senior Scientist, Abbott Laboratories

2018-01-16T09:50:53+00:00

Dan Caspi

Senior Scientist, Abbott Laboratories

dan
Dietrich is the real deal. I’ve been weight training since I was a teenager, but this past summer, I decided to commit to achieving something I’ve always wanted and never had: a six pack. After 5 months of personal training with Dietrich, I’m in the absolute BEST shape of my life. I’ve shed almost 5 inches off my waistline, 25 pounds of fat, and packed on several pounds of muscle. Now, I just need to find a good tailor!
kathly
“Dietrich has created a new me inside and out.”
I’m a 43 years old woman with two children, ages 8 & 12. I’ve always been somewhat in shape, but spending the first part of this year with Dietrich Horsey, my body is now leaner and stronger than it ever has been. Dietrich isn’t just a fitness professional trainer that takes your money and develops workout for you. He truly takes the time to invest in what you want, your physical and mental capabilities along with your nutritional daily intake before he starts a personalized training program. His attention to detail is amazing and can read your body like a book… It’s kind of scary when he knows I’ve cheated for the past couple days….

Kathy Valentine

2018-01-16T11:27:27+00:00

Kathy Valentine

kathly
I’m a 43 years old woman with two children, ages 8 & 12. I’ve always been somewhat in shape, but spending the first part of this year with Dietrich Horsey, my body is now leaner and stronger than it ever has been. Dietrich isn’t just a fitness professional trainer that takes your money and develops workout for you. He truly takes the time to invest in what you want, your physical and mental capabilities along with your nutritional daily intake before he starts a personalized training program. His attention to detail is amazing and can read your body like a book… It’s kind of scary when he knows I’ve cheated for the past couple days….
Alesha
“These workouts were much more functional, and challenged my body in a way that it hadn’t been before.”
Dietrich helped me win my 2nd figure competition. Dietrich provided me with a personalized nutrition plan that was tailored toward what I was looking to achieve, as well as customized workouts geared toward increasing my muscle mass. He was also able to coach and guide me with my posing/stage walk to assure everything was in sync come competition day. The workouts Dietrich gave me were unlike the training that I did with my previous show. These workouts were much more functional, and challenged my body in a way that it hadn’t been before. I am in the absolute BEST shape I have ever been in in my life and have come so far from my first show back in April, and I owe it to Dietrich.

Alesha

2018-01-16T11:40:28+00:00

Alesha

Alesha
Dietrich helped me win my 2nd figure competition. Dietrich provided me with a personalized nutrition plan that was tailored toward what I was looking to achieve, as well as customized workouts geared toward increasing my muscle mass. He was also able to coach and guide me with my posing/stage walk to assure everything was in sync come competition day. The workouts Dietrich gave me were unlike the training that I did with my previous show. These workouts were much more functional, and challenged my body in a way that it hadn’t been before. I am in the absolute BEST shape I have ever been in in my life and have come so far from my first show back in April, and I owe it to Dietrich.
michael
“Dietrich works continuously to make himself a better trainer.”
It would be very easy to make this testimonial about me, because I have improved my fitness level. Dietrich works continuously to make himself a better trainer. I don’t know of anybody who attends more classes and workshops. Dietrich then takes that experience and knowledge and shows up at every session prepared and ready to go. He designs workout programs of 4-to-6 weeks duration with specific goals in mind. When a program is finished, Dietrich has another program ready to go. My body is continually challenged, with no fitness plateaus or boring sessions. He helps turn weaknesses into strengths, concentrates on avoiding injury, and is very conservative with any injury that might occur. I strongly recommend you try Dietrich, except at 6:00 a.m. Mondays and Wednesdays. That’s my time.

Michael Felz

Tax Partner at Brown, Kaplan & Liss, LLP, Evanston

2018-01-16T11:33:25+00:00

Michael Felz

Tax Partner at Brown, Kaplan & Liss, LLP, Evanston

michael
It would be very easy to make this testimonial about me, because I have improved my fitness level. Dietrich works continuously to make himself a better trainer. I don’t know of anybody who attends more classes and workshops. Dietrich then takes that experience and knowledge and shows up at every session prepared and ready to go. He designs workout programs of 4-to-6 weeks duration with specific goals in mind. When a program is finished, Dietrich has another program ready to go. My body is continually challenged, with no fitness plateaus or boring sessions. He helps turn weaknesses into strengths, concentrates on avoiding injury, and is very conservative with any injury that might occur. I strongly recommend you try Dietrich, except at 6:00 a.m. Mondays and Wednesdays. That’s my time.
caroline
“I’m proud of my accomplishments under his care.”
Training with Dietrich has been a great experience. His expertise in health and fitness is unrivaled. I appreciate his attentiveness to my goals, his creativity in designing workouts specifically for my needs, and is ever-present enthusiasm and humor.

I’m lucky to work with a trainer like Dietrich, and I’m proud of my accomplishments under his care.

Caroline Freitag

2018-01-16T11:34:43+00:00

Caroline Freitag

caroline
Training with Dietrich has been a great experience. His expertise in health and fitness is unrivaled. I appreciate his attentiveness to my goals, his creativity in designing workouts specifically for my needs, and is ever-present enthusiasm and humor. I’m lucky to work with a trainer like Dietrich, and I’m proud of my accomplishments under his care.
kathy
“He is always devising new, interesting, effective, and YES, FUN workouts.”
Dietrich is an amazing trainer and an incredible person. He is always devising new, interesting, effective, and YES, FUN workouts. I have been weight training for the last couple of years, and at the age of 58, I am really proud of what I have accomplished, but in my short time with Dietrich, I have increased both my endurance and the amount of weight I can lift. I feel really toned and strong. We talk about goals and how I am going to reach them. He inspires me to really feel that I can and I have. Thank You!

Kathy Schitsch

2018-01-16T11:36:06+00:00

Kathy Schitsch

kathy
Dietrich is an amazing trainer and an incredible person. He is always devising new, interesting, effective, and YES, FUN workouts. I have been weight training for the last couple of years, and at the age of 58, I am really proud of what I have accomplished, but in my short time with Dietrich, I have increased both my endurance and the amount of weight I can lift. I feel really toned and strong. We talk about goals and how I am going to reach them. He inspires me to really feel that I can and I have. Thank You!
michele
“I have not only reached my goal, but am now surpassing my goals beyond what I had imagined.”
Dietrich has been my trainer for the past 2 1/2yrs. I initially came to him overweight, unhappy, and with a completely blinded relationship with food. It has been my pleasure…and challenge, to work with Dietrich over the years. I have not only reached my goal, but am now surpassing my goals beyond what I had imagined. I’VE done the work, but there is no way I could have done it without the guidance, patience and perseverance of Mr. Dietrich Horsey.

Michele

Montessori Directress Ages 3- 6

2018-01-16T11:37:12+00:00

Michele

Montessori Directress Ages 3- 6

michele
Dietrich has been my trainer for the past 2 1/2yrs. I initially came to him overweight, unhappy, and with a completely blinded relationship with food. It has been my pleasure…and challenge, to work with Dietrich over the years. I have not only reached my goal, but am now surpassing my goals beyond what I had imagined. I’VE done the work, but there is no way I could have done it without the guidance, patience and perseverance of Mr. Dietrich Horsey.
Ana
“Dietrich is the LEGMASTER, believe me!”
I’ve always liked lifting heavy weight, but I didn’t do it sensibly. For years I would over train and wind up injuring my knees and shoulders. However, in just a few years of training with Dietrich, I have not only doubled the amount of weight I can squat and deadlift, but I also have not had one ounce of pain. The key to Dietrich’s training is his thorough knowledge of anatomy and physiology. Dietrich has taken me, smartly, sensibly, and incrementally beyond my wildest dreams and still building!

Ana King

Ed.D. English professor, Truman College - City Colleges of Chicago

2018-01-16T11:38:10+00:00

Ana King

Ed.D. English professor, Truman College - City Colleges of Chicago

Ana
I’ve always liked lifting heavy weight, but I didn’t do it sensibly. For years I would over train and wind up injuring my knees and shoulders. However, in just a few years of training with Dietrich, I have not only doubled the amount of weight I can squat and deadlift, but I also have not had one ounce of pain. The key to Dietrich’s training is his thorough knowledge of anatomy and physiology. Dietrich has taken me, smartly, sensibly, and incrementally beyond my wildest dreams and still building!
KG_story
“I am starting to enjoy working out. Shhh…don’t tell my wife.”
After years of successfully avoiding the gym, Dietrich transformed my out of shape body and lack of true desire. After a few weeks he had me believing that I actually can get back in shape! More importantly, I am starting to enjoy working out. Shhh…don’t tell my wife.

Keith G.

2018-01-16T11:41:26+00:00

Keith G.

KG_story
After years of successfully avoiding the gym, Dietrich transformed my out of shape body and lack of true desire. After a few weeks he had me believing that I actually can get back in shape! More importantly, 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”
I came to Dietrich a year after my last pregnancy. I was stuck and unhappy with how I felt in my body. So I started twice a week with Dietrich, supplementing with cardio in between. Dietrich also had me record my food daily. It took 4 months of exercising 6 days a week and eating clean until I started to feel like me again. I can easily say I am healthier, stronger, and more disciplined than I have ever been.

– Emily N. Halliday

LCPC, NCC

5.0
2018-01-16T09:56:50+00:00

– Emily N. Halliday

LCPC, NCC

I came to Dietrich a year after my last pregnancy. I was stuck and unhappy with how I felt in my body. So I started twice a week with Dietrich, supplementing with cardio in between. Dietrich also had me record my food daily. It took 4 months of exercising 6 days a week and eating clean until I started to feel like me again. I can easily say I am healthier, stronger, and more disciplined than I have ever been.
“I have been an athlete all my life, but I have never been this strong!”
I have worked with Dietrich for the past year. I have been an athlete all my life. I have never been this strong! Dietrich is so much more than a personal trainer. He gets to know his clients and works with you where you are at the time. He moves you to places you didn’t even know you could get to. Since working with Dietrich I have added 30 yards to my drives on the golf course. Each shot has gained distance and my scores are coming down:-)!! I would tell anyone Dietrich is the guy to train with.

Donna

Physical Ed. Instructor

2018-01-16T11:39:35+00:00

Donna

Physical Ed. Instructor

I have worked with Dietrich for the past year. I have been an athlete all my life. I have never been this strong! Dietrich is so much more than a personal trainer. He gets to know his clients and works with you where you are at the time. He moves you to places you didn’t even know you could get to. Since working with Dietrich I have added 30 yards to my drives on the golf course. Each shot has gained distance and my scores are coming down:-)!! I would tell anyone Dietrich is the guy to train with.
“His skills in individualizing the routines and changing them frequently, keeps it interesting and effective.”
I have had the pleasure of working with Dietrich for four years, and the results have been remarkable. His challenging cardio routines, weight lifting regiments, and nutritional advice gave me the knowledge I needed to lose 40 pounds and recover from a shoulder injury. His skills in individualizing the routines and changing them frequently, keeps it interesting and effective in addressing whole body fitness. It has changed my life and that makes it worth the four hour drive I make to work with him.

Lisa Gross

2018-01-16T11:42:02+00:00

Lisa Gross

I have had the pleasure of working with Dietrich for four years, and the results have been remarkable. His challenging cardio routines, weight lifting regiments, and nutritional advice gave me the knowledge I needed to lose 40 pounds and recover from a shoulder injury. His skills in individualizing the routines and changing them frequently, keeps it interesting and effective in addressing whole body fitness. It has changed my life and that makes it worth the four hour drive I make to work with him.
“D has gotten me to limits I did not know I could attain, and keeps raising the bar for me! Thanks, D!”
I'm a 55-year-old guy who has tried to work out on my own and occasionally with a trainer over the years. Just when I would start to feel strong, I would hurt my back or have some other setback. I had worked with trainers, and never felt it was worthwhile. No one seemed to understand my 50+ issues, and what they showed me I felt I could do on my own. D has changed my outlook on working out altogether, and the results are there to prove it. I am stronger than I have ever been and, more importantly, my back never bothers me. I am in much better shape now than when I was in my thirties.

Dr. Manoj Mehta

NorthShore University Health System

2018-02-05T11:27:41+00:00

Dr. Manoj Mehta

NorthShore University Health System

I'm a 55-year-old guy who has tried to work out on my own and occasionally with a trainer over the years. Just when I would start to feel strong, I would hurt my back or have some other setback. I had worked with trainers, and never felt it was worthwhile. No one seemed to understand my 50+ issues, and what they showed me I felt I could do on my own. D has changed my outlook on working out altogether, and the results are there to prove it. I am stronger than I have ever been and, more importantly, my back never bothers me. I am in much better shape now than when I was in my thirties.
“I have found a great trainer, Andreea!”
“My first goal was to lose weight and get in shape, not get big, but get strong and limber. I felt if I found a good trainer (and I have found a great one!) and trusted him or her, I would make progress. That is what I wanted and that is what I found. Andreea is the best. She has put together a program that has been perfect for me and delivered results that I am very happy with to this point. I feel much better, and I am starting to see that I can be one of the fit people. I never ought of myself that way before.”

Mark MCClish

Northwestern University

2018-02-05T11:28:19+00:00

Mark MCClish

Northwestern University

“My first goal was to lose weight and get in shape, not get big, but get strong and limber. I felt if I found a good trainer (and I have found a great one!) and trusted him or her, I would make progress. That is what I wanted and that is what I found. Andreea is the best. She has put together a program that has been perfect for me and delivered results that I am very happy with to this point. I feel much better, and I am starting to see that I can be one of the fit people. I never ought of myself that way before.”
Healthful Tips
23 May13:27
23 May13:27
May 2018
May 2018
balance with logo
By Dietrich

The Importance Of Balance For Every Age

The older you are, the more you appreciate what “good balance” represents. If you have ever had the misfortune of sustaining an ankle sprain, especially a more serious one, a…

Read More
Address:
739 Main St. Evanston, IL 60202
Phone:
773-571-8844
Email:
workout@d21.fit
Working hours:
D21 Fit Studio is open by appointment only! Please contact us today if you are interested in a tour or free fitness assessment!