ISSA Fitness Seminar Professors

The International Sports Sciences Association's seminar professors are some of the most prestigious and respected names in the fitness industry. While other personal training certification programs talk about their "experts" we urge you to see for yourself and take an in depth look at their biographies, publications, and accomplishments.

We're confident you'll see why ISSA is truly the World Leader in Fitness Education.

Dr. Jack Barnathan ISSA Director of Fitness Sciences

Dr. Jack Barnathan, D.C., is an award winning Sports Doctor and ISSA Master of Fitness Science recognized internationally as a leading authority on strength development and its dramatic impact on health & human performance.

A lifelong strength athlete and IFBB Gold Medal honoree, Dr. Barnathan has served as both a pro judge and attending Doctor of Chiropractic for the International Federation of Bodybuilders (IFBB), which sanctions Pro and Olympic Bodybuilding and Women's Pro Fitness worldwide. Dr. Barnathan has been officially recognized as bodybuilding's "Strength Doctor" acknowledging his use of strength training principles and techniques in the care of his patients who often include Pro and Olympic athletes from virtually every known sport.

His Strength & Performance seminars are featured at some of the world's most exclusive events including Arnold Schwarzenegger's VIP Training Seminar, The President’s Council on Physical Fitness & Sports, The Kennedy Space Center, The NYC 2012 Olympic Planning Committee, The American Academy of Anti-aging Medicine and the private Palm Beach club 'Mar-a-Lago', owned by Donald Trump.

Governor Arnold Schwarzenegger has commended Dr. Barnathan’s “outstanding leadership at the seminars at the Arnold Schwarzenegger Fitness Weekend”, and further praised his work by stating “your talks are always one of the highlights of the weekend for me.  I am proud to know you.”

He has been voted both International Sports Chiropractor of the Year and Chiropractor of the Year. The President's Council on Physical Fitness & Sports officially commended Dr. Barnathan as "a vital link in the national fitness family", and The Presidential Certificate of Merit was awarded to Dr. Barnathan for his efforts on behalf of community fitness, with the President of the United States personal citing him as "a profound influence and shining example for us all".

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John Schaeffer, MFS, MSS, MPN ISSA Professor

John Schaeffer is known as a trainer’s trainer. John has over 30 years’ experience in the health and fitness industry—specializing in nutrition, weight management, and sports conditioning—and has trained Short Track Speed Skater Olympians Apolo Ohno and Allison Baver, Long Track Speed Skater Liam Ortega, Sprint Cycling Olympian Giddeon Massie, Triathlon Olympian Mark Fretta, and "The Contender" finalist Wayne Johnsen, among a host of other athletes. He is currently working on his dissertation for his Ph.D. in nutrition and has a Masters’ degree in fitness science, along with numerous additional fitness certifications from the International Sports Sciences Association (ISSA).

John has taught more than 100 ISSA certification seminars for Certified Fitness Trainers. In addition, his desire to help others has led John to write fitness books, nutritional supplementation information pamphlets, and fitness articles, and he has even developed software programs for personalized nutrition and training. He has also designed and developed numerous nutritional supplement formulas.

A five-time world champion powerlifter, John has also held numerous world records. He is also a professional kick-boxer, winning a Masters Super Heavyweight World Championship from MACK (Martial Arts Council of Kick Boxing).

John has been featured on the Discovery Channel (The Sweet Science, The Daily Planet Show),  in Powerlifting Video Magazine, Black Belt Video Magazine, as well as numerous other television and radio shows around the world. John has been awarded the International Sports Sciences Association Lifetime Achievement Award for his work in the fields of nutrition and fitness.

With all his achievements, John considers his greatest success to be the hundreds of people he has helped to achieve their fitness goals through his custom nutrition and training programs.

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ISSA Fitness Training Certification Seminar Professors