For people who want to age well and stay engaged with life. I share practical ideas and personal reflections on strength, adaptability, independence, and what it means to keep moving forward with purpose.
You Drive Science
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In the past, I shared with you research that shows the genetic contribution to health and longevity accounts for an estimated 25% contribution. As recently as 2026, another researcher quantified heritability at 50 %, mentioning that researching human life is challenging and full of confounding factors that are difficult to pin down. My personal experience (and maybe yours too) points directly to this challenge. I have outlived my dad and my older brother by 20-plus years. In addition, my three living brothers have had heart bypass or stent surgery, but not me. Is that a result of 25% or 50% heritability? Whether 25% is the ceiling or 50% is the floor—your level of influence—is significant either way. I never calculated my level of heritability. It is enough just knowing that I had inherited hypercholesteremia. From there I went to work creating my own flavor of performance longevity driven by curiosity, biological self-knowledge, and a refusal to accept a fixed fate. I am continually reminded that numbers, data and research, while solid may not be enough. Being receptive to new information, a seemingly soft and insignificant trait, is underrated. In fact, openness is one of the Big 5 Personality Traits that psychologists describe as the driver of not just aging but life’s trajectory. It is the capacity to remain curious—to consider new ideas, try things, explore new experiences, and accept that what once seemed true may no longer be the whole truth. The force that creates longevity is not found in heritability numbers. Evidence shows us that adaptive capacity and biological responsiveness, are innate in the human body. Remember, it’s not the strongest or most intelligent that thrive. Darwin’s conclusions are that those who can adapt effectively to changing environments will thrive. The proving ground or the test is in the adapting. We build the strength to survive and thrive by how we respond to new landscapes. Adapting in modern times means you recognize aging as a new landscape. When you begin to align your lifestyle with biology—how your body is designed to function—it will respond. It will reveal to you a surprising capacity for resilience and strength. Patterns are the key—what you eat consistently, how you move, how you sleep, how you manage stress—your lifestyle patterns are what influence how your biology responds. The leverage is in you, latent and waiting to be driven. Resources & Support Facebook Substack Gert in touch with your ideas, suggestions and comments. Forward this newsletter to anyone you know who may enjoy it. |
Fly Fisher Fitness
For people who want to age well and stay engaged with life. I share practical ideas and personal reflections on strength, adaptability, independence, and what it means to keep moving forward with purpose.
What Are You Training For? I spent September 2026 learning. You could say I was “back in school.” Early in the month, during a family vacation through Vermont, Canada, and Quebec, I kept running into reminders of what matters: “The destination is not as important as who we become in the midst of the journey.” “The language of society is conformity. The language of the creative individual is freedom.” It seemed I was never far from some nudge toward self examination and perspective. Later, I...
West Branch, Delaware River The Next Layer: What Makes Earned Performance Possible Last month we talked about how Lionel Messi earned his performance as a master athlete. I wrote, “very little of what Messi does is beyond our reach.” What is hidden in that statement is the effort that comes before the tactics—the awareness, focus, and intention that make his tactics matter. It’s easy to stay where we are, maybe too easy. The status quo can feel comfortable enough that we assume all is well....
Earned Performance At the World Cup, Lionel Messi was at the forefront—not just because of his goals, but because of how he played. Rather than chasing every ball, he strategically conserved energy through exceptional spatial awareness, timing, and disciplined movement. His approach is deliberate and reflects wisdom: awareness, focus, and restraint. By managing his physical output, he reduced unnecessary energy expenditure and wear and tear. Messi uses all he has—mind and body—maximizing his...