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Dr. Mike Simpson is a former Army Ranger and Special Operations Forces physician who was deployed at age 48, keeping up with elite military operators decades younger. He's also a practitioner of Thai boxing and Brazilian jiu-jitsu, and the author of 'Honed: How to Keep Your Edge as a Man After the Age of 40.' In this conversation, Mike reveals how he rejected the societal expectation that decline begins at 40, why most men give up to the passage of time without realizing they have a choice, and the specific strategies he used to be in the best shape of his life at 48 years old while deployed in a combat zone. This is a roadmap for any man who refuses to coast into old age.
Starting around age 30, men's testosterone levels decline by about one to two percent per year. By age 40 or 50, testosterone levels may be significantly lower than in the twenties, affecting body composition, energy, mood, and libido. However, optimizing lifestyle factors like sleep, nutrition, exercise, and reducing body fat can produce significant natural improvements before considering testosterone replacement therapy.
Dr. Mike Simpson is a former Army Ranger who went to West Point, served as an infantry officer, then attended medical school and returned to the Army as a flight surgeon supporting the special operations community. He deployed at age 48 and is now 55, training Thai boxing and Brazilian jiu-jitsu while maintaining peak physical condition.
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Most men hit 40 and accept a narrative they've been sold their entire lives: it's time to gain weight, start taking blood pressure medication, play golf on weekends, and call it good. Mike Simpson calls this exactly what it is—a fake societal construct based on what's average, not what's possible. The expectation that decline is inevitable becomes a self-fulfilling prophecy when men decide to stop fighting. But aging is real, and its effects are real. The question is whether you're going to do something about it or just give up. Mike didn't just reject this narrative—he proved it wrong by being in the best shape of his life while deployed at 48. The full explanation of why mindset is the first and most important step starts at 1:38.
Mike's path wasn't linear. After West Point, Ranger school, and serving as an infantry officer, he made the decision to leave the Army and pursue medical school. He completed a residency in emergency medicine, then returned to the military as a flight surgeon supporting special operations forces. That's when the real test began—trying to keep up with men ten, fifteen, sometimes twenty years younger who were absolute animals. At 48, he was the oldest guy in his unit by about ten years, carrying the aid bag, in the stack, doing everything that was expected of a SOF doc. The experience forced him into the best shape of his life and proved what's possible when you refuse to accept decline. Mike's full military background and deployment story starts at 9:28.
Hear Dr. Simpson explain how he kept up with elite operators two decades younger
The old adage that you can't outrun a bad diet becomes brutally true as you age. Mike explains that as metabolism slows and hormones shift, the window for eating whatever you want and still performing well closes fast. He estimates nutrition accounts for sixty to seventy percent of the equation. The basics are simple: eat real food, eat whole foods, get plenty of protein, eat your vegetables, minimize processed food, minimize sugar, minimize alcohol. It's the execution that's hard. But when Mike was preparing for deployment and training with operators decades younger, he had no choice but to dial it in. The difference between knowing what to do and actually doing it is what separates men who stay sharp from those who fade. Mike breaks down his nutrition philosophy starting at 15:48.
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SubscribeMost supplement advice is noise. Mike cuts through it with four essentials he considers universally beneficial for men over 40. Vitamin D tops the list—most people are deficient, especially in northern latitudes, and it's crucial for bone health, immune function, testosterone production, and mood. Omega-3 fatty acids from fish oil are anti-inflammatory and support heart and brain health. Magnesium, which most people lack, is critical for muscle function, sleep, and stress management. And then there's creatine, possibly the most well-researched supplement in sports science history. It's safe, effective, cheap, and proven for strength, power, lean body mass, and emerging research shows benefits for brain health. Tom didn't start taking creatine until age 42 and wishes he'd started sooner—the recovery and performance benefits were immediate. The full supplement breakdown starts at 23:33.
Don't miss this one. Dr. Simpson's roadmap is practical, evidence-based, and proven in the field.
This conversation hit home for me because I'm living proof of what Mike is talking about. At 44, I'm in better shape than I was at 30 or 35. It's not because I have special genetics or some secret formula—it's because I decided I wasn't going to accept decline as inevitable. When Mike talks about the fake bill of goods we're sold at 40, I know exactly what he means. I see it all around me. Guys my age who've just given up, accepted that they're going to be heavy and slow and medicated, and they're missing out on so much.
What I love about Mike's approach is that it's practical and proven. This isn't theory from some academic—this is a guy who was deployed at 48 keeping up with the best military operators on the planet. He wrote the book 'Honed' because there's a real lack of information for men about how to stay sharp, and I read it cover to cover in one sitting. It's that good. The strategies he lays out for fitness, nutrition, sleep, mindset, and supplements are straightforward and actionable.
Whether you're 35, 55, or 75, this episode is for you. Because Mike's message is simple: it's never too late to start, and the best time is right now. You can be the fittest grandfather on the planet if you start preparing today. This conversation is worth your time—listen to the whole thing.
Honed: How to Keep Your Edge as a Man After the Age of 40 is Dr. Mike Simpson's guide to maintaining peak physical fitness, health, and mindset well beyond middle age. The book arose from Mike's personal experience navigating the aging process while supporting special operations forces and provides a proactive roadmap rather than reactive sick care.
Dr. Mike Simpson was 48 years old when he deployed as a Special Operations Forces physician. He was the oldest member of his unit by approximately ten years and was able to keep up with elite military operators who were significantly younger.
Dr. Simpson recommends four core supplements: vitamin D for bone health, immune function, and testosterone production; omega-3 fatty acids for anti-inflammatory and cardiovascular benefits; magnesium for muscle function, sleep, and stress; and creatine for strength, power, lean body mass, and brain health. He emphasizes these are universally beneficial and well-researched.
According to Dr. Simpson, testosterone replacement therapy should be a last resort, not a first resort. He recommends first optimizing lifestyle factors like sleep, nutrition, exercise, and body composition, which can produce significant natural improvements in testosterone levels. TRT should only be considered under supervision of a competent physician if you're still symptomatic after lifestyle optimization.
Dr. Mike Simpson is a West Point graduate who served as an Army Ranger and infantry officer before attending medical school. He completed a residency in emergency medicine and returned to the Army as a flight surgeon supporting special operations forces. He is now 55 years old and actively trains Thai boxing and Brazilian jiu-jitsu.
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Dr. Mike Simpson (Author, Former Army Ranger, SOF Physician) | Jim Rohn (Motivational Speaker)
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About this Guest
Dr. Mike Simpson is a West Point graduate, former Army Ranger, and Special Operations Forces physician who deployed at age 48. He holds a medical degree and completed a residency in emergency medicine before returning to support the special operations community. Now 55, he continues to train Thai boxing and Brazilian jiu-jitsu and is the author of 'Honed: How to Keep Your Edge as a Man After the Age of 40.' His book is available on Amazon, and he hosts The Honed Podcast. Follow him on Instagram at @doctormikesimpson.
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