Our Weight Loss Team

Their goal? To see that you achieve yours.

They're the best, brightest and most dedicated group of registered dietitians, exercise physiologists and behavior coaches. Consider them your co-pilots on the road to sustainable weight loss.

Your own team will be selected to match your lifestyle, weight loss goal and personal preferences.

Featured Experts:

Yousef Zamat - Exercise Physiologist

After 10 years as a fitness/performance coach for three major league baseball teams—plus contributing to training manuals for athletes to use in recovery and during the off-season—Yousef will inspire your own training and help you improve your health and wellness stats.
Read Yousef's bio

Featured Experts:

Lori Klein - Behavior Coach

Lori has counseled individuals and their families for over 15 years. She understands well that making sustainable changes takes more than just the knowledge of what to do. It takes the motivation and mindset to actually get it done.
Read Lori's bio

Featured Experts:

Stefanie Painter - Registered Dietitian

A former competitive dancer, this weight loss expert has a passion for healthy living. A Registered and Licensed Dietitian and Certified Personal Fitness Trainer, she is now pursuing a Doctor of Health Education. Stefanie is here to help you find your rhythm for a healthy lifestyle.
Read Stefanie's bio

yousef lori stefanie

Lori Klein - Retrofit Behavior Coach

Lori Klein is dedicated to health, ﬁtness and mental wellness in both her professional and personal life. As a social worker, Lori has counseled individuals and their families in Chicago and the Washington D.C. area. While working in various school systems, she helped develop behavioral modiﬁcation systems and strategies for students with emotional difﬁculties. She graduated with a BA in Journalism from the University of Wisconsin-Madison and earned her MSW from Loyola University-Chicago.

Lori serves on the Board of Directors for a leading mental health organization in metropolitan D.C. In her role of chairing a city-wide community service event, Lori helped produce and deliver healthier foods to recipient agencies and shelters throughout the D.C. metro region. Lori is an avid community activist who strives to lead and encourages others to lead active, healthy and rewarding lives. Lori resides in the D.C. area with her husband and three children.

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Yousef Zamat - Retrofit Exercise Physiologist

Yousef Zamat has 10 years of experience in the Fitness/Sports Performance profession. He began his career in 2003 at the Chicago Bulls/White Sox Training Academy, where he was a Sports Performance Coach for aspiring athletes. In 2006 he became Strength and Conditioning Coach for the Tigers and supervised rehab programs for injured athletes, coordinated team stretches, training sessions and conditioning drills. In 2008 he traded hats for the Los Angeles Dodgers, where he helped develop a recovery manual that outlined physical, mental and nutritional forms of recovery for the athletes to employ.

In 2010 he joined the San Francisco Giants, where he lent a hand in winning two World Series Championships. Yousef was part of a team that worked to design programs speciﬁcally targeted at strengthening individual playersʼ deﬁciencies. He holds a BS in from Benedictine University and a MS in Exercise Physiology from Northern Illinois University.

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Stephanie Painter - Retrofit Registered Dietitian

Stefanie Painter is an experienced weight loss expert with a passion for healthy living. She is a Registered and Licensed Dietitian and Certified Personal Fitness Trainer, and is currently pursuing a Doctorate of Health Education with an emphasis on Executive Coaching. She holds both a BS and MS in Dietetics from Marshall University.

Stephanie firmly believes that sustainable weight loss cannot be achieved without behavior modification and education. Habit change can be especially difficult, something that she knows first hand, having been diagnosed with both celiac disease and rheumatoid arthritis within a three-year time span. What was once a forced and abrupt lifestyle change, however, is now a valuable experience that connects Stephanie to her clients and their unique challenges.

Prior to her diagnosis, Stephanie danced competitively for 20 years. She now enjoys running during the warmer months and cross-country skiing through winter. Her active lifestyle has only increased her passion for wellness, a passion she hopes to instill in others as they seek positive change in their lives.

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Our Advisory Board

Retrofit is proud to have some of the nation's leading weight management experts design our program, including two past presidents of The Obesity Society. Collectively our advisory board members have worked with over 40,000 weight loss clients across the country.

Robert Kushner, MD, MS

Holly Wyatt, MD

James Hill, PhD

Dawn Jackson Blatner, RD, CSSD

Brad Saks, PsyD

Melissa Mellady, ACSM-CES