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The Fitness Principle with Mackie Shilstone is staffed exclusively by team members who are dedicated to promoting the highest levels of fitness, performance and health. We not only teach it, we live The Fitness Principle. Our staff holds high levels of training and experience. They represent the very best in life and performance coaching. From fitness to nutrition to disease management and lifestyle modification, The Fitness Principle Staff will help you become the best you can be. Kat Bradley
She has been a personal trainer since 1993 and is certified by the Aerobics and Fitness Association of America (AFAA) and is also certified in CPR. She believes in keeping her clients moving, motivated, and focused on their goal. Kat loves when her clients put the puzzle pieces together of nutrition and exercise and begin to see results. She enjoys seeing the satisfaction of personal achievement they feel and sharing her love of sports and nutrition with others and promoting the benefits of living a healthy lifestyle. Chris Depolo
Chris received his Bachelor of Science in Exercise and Sports Science from Penn State University. He became a trainer in 1994 to work with and train athletes. He finds watching his clients succeed and reach their goals the most gratifying part of being a trainer. His training philosophy—do a little better today than yesterday. Claiborne Davis
Dan Doucet, MS, ATC, LAT, LCEP
Dan received his Master of Science in Exercise Science and is a licensed Clinical Exercise Physiologist and a Certified Athletic Trainer on both local and national levels. He is also a visiting lecturer at the LSU Family Residency Program, founding president of the Louisiana Association of Exercise Physiologists, and has been an athletic trainer at the Olympic Training Centers on Colorado and San Diego. Julie Fortenberry, LDN, RD 
Julie obtained a Bachelor of Science in Nutrition and Dietetics from the University of Southern Mississippi. She completed her dietetic internship at Touro Infirmary in New Orleans. She has counseled numerous clients of all ages and status helping them to meet their individual health goals. She aids in the fight against childhood obesity by providing nutritional education and counseling to parents and children. Julie is a licensed, registered dietitian and a member of the American Dietetic Association. Elizabeth Krebser
Elizabeth is certified by the National Strength and Conditioning Association (NSCA) as a personal trainer, and the American College of Sports Medicine (ACSM) as a health fitness instructor. She has been a trainer since 1995 and loves being able to positively influence her clients’ lives and to help them build better self-esteem. She went to school at The Fitness Institute in Boca Raton, Florida where she received her certification as a personal training specialist. Her training philosophy--instead of making excuses not to workout, start looking forward to the reasons why you should. Matt Lovitt
Matt received his Bachelor of General Studies with an emphasis in Kinesiology, Nutrition, Business and Sociology from Louisiana State University. He is certified by the American College of Sports Medicine and has been a trainer since 2006. He is also certified in CPR. Matt enjoys teaching people how a healthy lifestyle can increase their quality of life and always tries to make sure his clients enjoy the process. He believes in making fitness a priority to increase your overall quality of life. Axel Murillo
Axel has been a trainer since 1994 and is a certified U.S.A. Boxing Level II trainer. He became a trainer due to his love of boxing and enjoys seeing results in his clients’ bodies and use of great technique. Shannon Patterson
Shannon received his Bachelor of Physical Education from Taylor University and his Master of Science in Kinesiology from the University of Kentucky. He has been a trainer since 1996 and enjoys being around goal-oriented people. Seeing someone smile as they reach a goal is one of the most gratifying parts of his job and he lives his training philosophy of “the only easy day was yesterday” in training both athletes and non-athletes. Charlie Rader
Anna Zeringue
Anna has a passion for wellness that is particularly demonstrated in her own life, through proper exercise, nutrition and healthy lifestyle choices. Teaching Pilates fulfills her desire to help individuals maximize their potential by becoming stronger and more functionally fit. She says, “I love to see my clients’ progress and their positive changes in overall functionality. They gain confidence in their abilities throughout the program, and that same confidence carries over to their personal lives.”
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“I had a client who needed to lose weight in order to donate a kidney to her brother. She not only lost the weight, and saved her brother’s life, but recovered from the surgery in record time because she was in such good condition.”
“One of my clients, a Tulane Baseball pitcher, was told by doctors that he would not pitch again due to a very bad shoulder. He sought out our program and after a year of rehab and sport specific conditioning in our program, not only was he able to pitch, but became a valuable part of the Tulane baseball staff.”
Claiborne is a certified instructor through Wild Lotus Yoga in New Orleans. His training focused on alignment, breathing techniques, meditation and posture sequencing to help open tight areas of the body. A tennis player who was developing muscle imbalances, he went to his first class in 2003 after a friend convinced him to try it. After just one session, he says, “I was intrigued by the notion that something seemingly so passive was actually an active and precise way of tuning the body and could create an immediate, positive physical and mental shift.” Claiborne’s passion for the transformative powers of yoga comes through in his instruction, and he can tailor sessions to any level of fitness and flexibility. 
“Over the years I have been able to work with Olympic athletes, high school athletes and everyday people wanting to improve their health and performance. I have enjoyed working with all of them. Although everyone has their own goals and motivation, they all want to succeed. Helping them realize their goal is extremely gratifying.”
“I trained a client who was supposed to have surgery on both of her knees. Through proper strength training and stretches she avoided surgery. She was so inspired she asked me to mentor her and she got her certification as a personal trainer!”
“My greatest success story was a client that lost 21 pounds in 2 months, of which, 19 pounds were pure fat loss!”
“I’ve done work with numerous world champion fighters, but Chad Dawson taking two belts from Antonio Tarver is my greatest training success story. Technique is crucial. In boxing conditioning, it gives the boxer confidence, courage, and all together, victory.”
“I have known Karen Matthews for about 3 years and she inspires me on a daily basis. She has lost a great deal of weight but that is not why she is a success. Her attitude and energy is very contagious and everyone who comes in contact with her knows how positive and enthusiastic she is about life. I feel very lucky to have her as a client.”
Charlie has been a trainer since 2002. He is certified by The American Council on Exercise (ACE). Over his career, Charlie has trained with some of the best boxers and kick boxers in the world. He is regarded as one of the most outstanding MMA fighters in Louisiana and is the current USA-MMA Welterweight Champion.
Anna is a Pilates instructor with six years of experience, specializing in programs specifically tailored to individual needs. She draws upon her 25 years of Occupational Therapy experience and training to design programs that address the individual needs of her clients.
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