739 Main St. Evanston, IL 60202

Evanston’s #1 Coaches

Certified Fitness Trainer

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.”

David Bruce Martin

Certified Fitness Trainer

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.

David’s Tip

“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

Certified Fitness Trainer

Stephanie 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!

Jason Cooper

Certified Fitness Trainer

Jason (Coach J) has been certified as a personal trainer since the Summer of 2017, but has been studying in the fields of health and wellness since 2015. Also being certified as a massage therapist, Jason always tries to look at the bigger picture when it comes to his own own health and the health and progression of his clients. He understands that every individual client is going to have their own individual needs, so clients are never going to receive a cookie cutter approach with his programs. It is never about just lifting weights, it is never just about cardio, or just being the most flexible, however, it is about challenging yourself in a multitude of ways and discovering things about yourself that you once might not have believed to be possible. Therefore Jason uses an integrated training style in which resistance training, cardio endurance, balance and reactive training, core training, and flexibility and mobility are the focal points.

Jason’s Tip

“Don’t try to change everything at once (as it relates to your health). It is easy to want a big change all at once. Try focusing on one area of your health to start. Once you feel you have that momentum, then move on to another area of your health you would like to address.”

Justin David

Certified Fitness Trainer

Justin David became certified in fitness training in 2016 through the International Sports Science Association. After receiving his certification, Justin gained personal trainer and management experience through positions at Cardinal Fitness and Xport Fitness. Justin has worked with clients ages 18 to 75, in one-on-one and in group settings. Justin’s background in bodybuilding and combat sports has allowed him to help his clients achieve elite fitness levels by drastically dropping body fat percentages, as well as gaining lean amounts of muscle.

In August of 2017, Justin’s dream of training clients on his own came true; he signed on with D21 Fit Studio as a private contractor. As Justin now trains, he also plans to enter into his first men’s physique competition as a natural bodybuilder in 2018.

Justin’s Workout Tip

“The moment you want it as bad as you want to breath is the moment when you succeed.”

“Miss Gina Maria”

Gina is a knowledgeable Certified Instructor trained in Family Yoga, Thai Yoga, and Strong Posture rehabilitation techniques. She has been teaching yoga and working with people who have musculoskeletal pain and biomechanical restrictions to regain strength, improve balance and alignment and enhance their quality of life since 2010.

She also holds Bachelors and Masters degrees in Literature and History.

You can learn more about Gina here.
Vitality Yoga: Thursdays 5:00 – 6:15 pm and Sundays 7:30 – 8:45 am
Classes & Packages

Gina’s Tip

“Strength and flexibility go hand-in-hand. As you increase your strength, it is equally important to improve flexibility for optimal health and daily functioning. Yoga enhances physical training and promotes relaxation as well. It also brings calm and balance into your life!”