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What is 40fit?

40fit supports a community of athletes age 40+ with Fitness, Community and Lifestyle resources. The goal is to support performance, lifestyle and quality of life for 40 plus athletes. By combining the resources of evidenced based science, anecdotal experience, and the community, individuals are challenged to look at aging through a refreshing perspective and reach their maximum genetic potential.


The more I trained using various methods, the more I realized there was something missing.  I noticed that even though I was significantly more fit than most of my peers, my experience in training was not the same as the “younger crowd.” The higher my fitness level became, the more I realized the value of fitness and lifestyle factors that I paid less attention to in the past. This is true for almost any athlete seeking higher levels of performance and capacity. Any inexperienced athlete can make quick and sometimes astonishing gains.

40fit programming is based on my own personal experiences as an athlete, evidenced based science and the collective experiences of the community. The programming model is a conjugate of these inputs and represents an adaptive construct to support the maximum genetic potential of each individual athlete. There is no one system that can meet the needs of all individuals, and anyone who would tell you otherwise is selling something for the purposes of selling something. The programming in the training model will constantly change and be a work in progress. We will not follow fads or training techniques just because someone else recommends them or they have become sexy. The foundation of any training should be based on what works, not what sells. I know that puts us at a significant disadvantage to spread the word, but I hope that the results of those who engage in our training will be evidence enough.

Jul 6, 2018

The Starting Strength community is a goldmine of intellectual horsepower, and Jonathon Sullivan - or Sully as we know him - is one of the main reasons for that. Sully is an MD with over 25yrs experience in Emergency Medicine, a PhD who has studied the effects of brain ischemia, and a Starting Strength Coach who runs Greysteel Strength & Conditioning in Michigan. He is now primarily a barbell coach with a mission to help older people get stronger, get healthier, and age with grace and dignity.


Sully is also the principal author of The Barbell Prescription: Strength Training for Life After 40, a groundbreaking text on strength training for the Masters population. The Barbell Prescription outlines the vast (and completely preventable) problem of the Sick Aging Phenotype affecting millions people in their 40s, 50s, 60s, and beyond. The Sick Aging Phenotype is marked by obesity, metabolic syndrome, sarcopenia (loss of muscle mass), osteopenia (loss of bone density), dependence on lots of medications, Type II diabetes, and other problems. All of which are preventable by intelligent strength training, conditioning, and nutrition. We highly recommend reading this book - it's the definitive text on aging and strength training.


Sully runs Greysteel Strength & Conditioning in Farmington, MI, a gym committed to helping seniors live stronger, healthier lives. He also runs a very informative and entertaining YouTube channel. You can check those out here:


Sully also coaches clients online for Starting Strength Online Coaching