About B Strong

Enhance your current exercise regime with our patented B Strong BFR Training System

B Strong’s patented blood flow restriction training system was developed by James Stray-Gundersen, MD Sports Medicine & Science, who worked with elite-level athletes, and Sean Whalen, MS Engineering, a successful entrepreneur in the rehabilitation and sports performance industry.

After Dr. Stray-Gundersen was introduced to the concept of BFR, he studied it and tested it on the Olympians he was training. He quickly saw the potential it offered for changing the way people train, recover, heal and stay healthy, but also saw a need for a better BFR tool so that everyone could safely reap the benefits of BFR in a more effective, comfortable and user-friendly way. Dr. Stray-Gundersen sought to develop that BFR tool and partnered with Sean Whalen to optimize the technology for mass adoption. With Sean’s 15+ years of tech experience in physical rehabilitation and entrepreneurship, and Jim’s 30+ years at the top level of elite sports and the sports performance field, they set out with the goal of making a BFR system for everyone, designed with hardware and software ingenuity, scientific acumen, and vigorous yet simple education.

This evolved into B Strong, a safe, effective, affordable and easy-to-use BFR system that quickly became the tool of choice for thousands of users around the globe. Since 2017, we’ve been proud to call some of the best athletes, coaches, doctors and physical therapists in the world a part of the B Strong family.

As the field continues to develop, we are committed to using science, engineering, education, and our strong connection with the professional rehabilitation and sports training community to continue to make this highly-effective technology more accessible.

After first being skeptical of BFR, Jim Stray-Gundersen, MD, tested it and was quickly amazed at its impact on fitness, health, lean body mass and muscle/strength increase on already highly trained athletes. Dr. Stray-Gundersen knew BFR could have a significant impact on all populations as a means of enhancing exercise and performance if he could make it safe and effective, easy to use, and affordable.  Safe and effective were at the top of the list because Stray-Gundersen had identified the key mechanisms needed not only to make BFR safe, but also make BFR effective and improve lives. 

Indeed, Jim Stray-Gundersen, MD, brought valuable credibility and increased attention to the idea of Blood Flow Restriction (BFR) Training in the lastdecade throughout the US and Europe. In fact, research started to accelerate when Dr. Stray-Gundersen started using it and talking about in the field of exercise physiology, health and fitness, and at the highest level of sport - an arena Stray-Gundersen dominated for 30 years.    

However, with BFR, most work was focused on rehabilitation from musculo-skeletalinjuries.  Stray-Gundersen expanded the application to the mainstream with the improvement in strength and fitness for the Olympians and Professional athletes he was actually training. Stray-Gundersen wanted all populations to benefit from this "out of the ordinary" method of training to become fitter, stronger, and improve lean body mass, and bone density with exercise.

Obviously, Stray-Gundersen recognized that regular exercise and good nutritional practice defined the “medicines” for healthand fitness. As his experience showed, populations could take the lessons from Olympians and incorporate them into their own busy lives if results were yielded quickly.  

Stray-Gundersen lead research over the years proving that regular exercise mitigates the effects of many chronic diseases, but to do so, requires “doses” of exercise that many find impossible to do on a regular basis. Alas, there are a million reasons why we don’t incorporate regular exercise into our busy lives.  That is where Stray-Gundersen believed BFR fit in perfectly - reducing time commitment and lowering risk of injury and damage associated with exercise.

That is where BFR using B Strong is well suited to providing “doable,” safe and effective, robust exercise in a short period of time (15 to 20 minutes), anywhere, anytime for all age groups. Regular B Strong Training, using the the safe and effective equipment and protocols that have been designed, is the solution for many of the chronic health problems of the nation. 

Dr. Stray-Gundersen often referred to B Strong as  “anti-aging medicine." Over the past decade, Dr. Stray-Gundersen, has helped pioneer the use of, define the mechanisms of, and implement blood flow restriction training and protocols in the US and Europe. 

Introduced to concept of BFR by a colleague at the American College of Sports Medicine over a decade ago, Stray-Gundersen was intrigued but at first skeptical of the modality that had been hidden away in Japan.  Stray-Gundersen began testing the method and quickly saw first hand, the impact of the BFR Modality on the Olympians and the normal population he was training, for increasing power, strength, healing and recovery, improving bone density, improving lean body mass and a number of additional intricate physiologic improvements including endothelial function. 

With Stray-Gundersen's unmatched depth of expertise in medicine, cardiopulmonary and cardiovascular physiology, he continued to research, test, apply, and discovered and identified the key mechanisms that not only made BFR safe, but also made BFR effective, more comfortable and easier to use. 

Stray-Gundersen partnered with Stanford Engineer Sean Whalen to design a stand alone, totally unique deployment of BFR unparalleled in the space - B Strong Training. 

Stray-Gundersen has done thousands of applications of BFR on various populations and lead hundreds of seminars, certification courses, lectures as the medical doctor expert on BFR.  

Stray-Gundersen and Sean Whalen co-founded and co-developed B Strong Training Systems - a comprehensive and unique deployment in the category of BFR product and complete training platform, based on Stray-Gundersen’s background and knowledge, designed for safety and efficacy for all populations to use to achieve full benefit from exercise using B Strong as a catalyst.  

Stray-Gundersen's courses continue to populate throughout the globe as his expertise is unmatched in the arena of instruction for future instructors and users of Blood Flow Restriction Training Theory and Application to Physical Therapists, Medical Doctors, Chiropractors, Personal Trainers, Occupational Therapists, Professional Strength and Conditioning Coaches, members of the military and Special Forces, as well as the consumer.

Board Certified in General Surgery, Stray-Gundersen's  background in both academic and athletic platforms gave him a unique perspective of training and performance for all ages and all levels of fitness. Stray-Gundersen was on the as research faculty in Cardiology and Orthopedics at the University of Texas Southwestern Medical School in Dallas, Texas for 20 years, and has also worked for 35+ years in Olympic and Professional Sports, focusing on maximizing human performance as a physician, physiologist and nutritionist for United States, Norwegian, German and Canadian National teams in the sports of track and field, cycling, swimming, all types of skiing, speed skating, biathlon, rowing, etc. Stray-Gundersen is co-researcher/author of the pioneering altitude study Live High/Train Low - a 15-year study that internationally changed how athletes and coaches use altitude training to enhance performance, legally, for which he earned the nomiation for Scientific Award from the United States Olympic Commiee.

Stray-Gundersen also dedicated his career to anti-doping, being the first to do invasive blood testing at the World Championships in Lahti, Finland, in 1989. He has worked with WADA, USADA and has developed the anti doping test called SAFE - SAFE and Fair Events implemented in 2002 Olympic Games, considered by some the most aggressive test to detect and deter doping in sport.

Stray-Gundersen served on international medical committees that include the International Olympic Committee, FIFA, International Biathlon Commiee, International Ski Federation, the International Skating Union, and the International Cycling Federation Stray-Gundersen. He worked with Special Forces, Marines, Army, Navy SEALs, Delta Force and served as the sports science advisor for the US Ski and Snowboard Association (USSA) for over 30 years, and founded the SG Performance Medicine Center in Frisco, Texas and Park City, Utah.

His focus on maximizing human performance and in his quest uncovered a true understanding of BFR and created a very unique way to benefit from BFR in the safest and most efficacious manner with B Strong Training to improve lives.

Our Founder Explains How BFR Training Can Enhance Your Workouts

A Patented Blood Flow Resistance Training System as seen in:

Get Back In The Game With B Strong BFR

Our promise - noticeable change in 21 days, guaranteed. Follow our guided introprogram and get results you can see, or your money back

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