Karl Sterling Podcast

Most people think protein is just about hitting a number — 100 grams, 150 grams, whatever your app tells you. But if you're over 40, *when* you eat that protein might matter almost as much as how much. Let me explain why.

Here's something most people don't know: your body can only use so much protein at once to build and repair muscle. Research suggests there's a ceiling — somewhere around 30 to 40 grams per meal — where muscle protein synthesis maxes out. Eat way more than that in one sitting, and the extra doesn't just pile onto muscle-building. So if you're eating one huge protein-loaded dinner and skipping it the rest of the day, you're leaving a lot on the table.

Here's where it gets more important as we age. There's a phenomenon called anabolic resistance — basically, older muscle doesn't respond to protein as efficiently as younger muscle. That means the same 20 grams that triggered a strong response at 25 might not do much at 65. The fix isn't complicated: slightly larger protein servings, spread more evenly across the day.

In practice, this looks like three things. First — breakfast. Most people's most protein-poor meal. A couple eggs won't cut it if you're trying to hit that per-meal threshold. Second — post-exercise. Your muscles are primed to use protein efficiently in that window after training. Third — before bed. A slower-digesting protein source overnight can help offset the natural muscle breakdown that happens while you sleep.

Why do I care about this as a neuromotor trainer and not just a nutrition coach? Because muscle loss — sarcopenia — isn't just a cosmetic issue. It's directly tied to balance, fall risk, and functional independence as we age. Every client I work with on neuromotor rehab benefits from having the raw materials — protein — to actually build back what we're training.

So here's your takeaway: stop thinking about protein as one number for the day. Think about a palm-sized portion, at every meal. That's the shift that actually moves the needle

La mayoría de las personas piensan que la proteína se trata solo de alcanzar un número — 100 gramos, 150 gramos, lo que sea que diga tu aplicación. Pero si tienes más de 40 años, el momento en que comes esa proteína puede importar casi tanto como la cantidad. Déjame explicarte por qué.

Esto es algo que la mayoría no sabe: tu cuerpo solo puede usar cierta cantidad de proteína a la vez para construir y reparar músculo. La investigación sugiere que hay un límite — alrededor de 30 a 40 gramos por comida — donde la síntesis de proteína muscular llega a su máximo. Si comes mucho más que eso de una sola vez, el exceso no simplemente se suma a la construcción muscular. Entonces, si comes una sola cena enorme cargada de proteína y te la saltas el resto del día, estás dejando mucho beneficio sin aprovechar.

Aquí es donde se vuelve más importante conforme envejecemos. Existe un fenómeno llamado resistencia anabólica — básicamente, el músculo de una persona mayor no responde a la proteína tan eficientemente como el músculo joven. Eso significa que los mismos 20 gramos que generaban una respuesta fuerte a los 25 años, tal vez no hagan mucho a los 65. La solución no es complicada: porciones de proteína ligeramente más grandes, distribuidas de manera más uniforme a lo largo del día.

En la práctica, esto se traduce en tres cosas. Primero — el desayuno. La comida más pobre en proteína para la mayoría de las personas. Un par de huevos no será suficiente si buscas alcanzar ese umbral por comida. Segundo — después del ejercicio. Tus músculos están preparados para usar la proteína eficientemente en esa ventana después de entrenar. Tercero — antes de dormir. Una fuente de proteína de digestión más lenta durante la noche puede ayudar a contrarrestar la degradación muscular natural que ocurre mientras duermes.

¿Por qué me importa esto como entrenador neuromotor y no solo como coach de nutrición? Porque la pérdida muscular — sarcopenia — no es solo un problema estético. Está directamente relacionada con el equilibrio, el riesgo de caídas y la independencia funcional conforme envejecemos. Cada cliente con quien trabajo en rehabilitación neuromotora se beneficia de tener la materia prima — proteína — para realmente reconstruir lo que estamos entrenando.

Así que aquí está tu conclusión: deja de pensar en la proteína como un solo número para el día. Piensa en una porción del tamaño de tu palma, en cada comida. Ese es el cambio que realmente hace la diferenciaL

Everyone's talking about zone 2 cardio for longevity. But what happens when a client can't get on a bike or hit a target heart rate because of a neurological condition?

Zone 2 training — low-intensity, sustained effort — is one of the most cited longevity interventions out there. More mitochondrial density, better fat oxidation, stronger cardiovascular health. But most of that content assumes a healthy person on a treadmill or bike, hitting 60 to 70 percent of max heart rate for 30 to 45 minutes straight.

For certain neurological clients, that model doesn't hold up. Heart rate response can be blunted by autonomic dysfunction or by medications like beta blockers and dopaminergic drugs. Pacing gets hard when gait is unstable or freezing episodes show up mid-session. Telling someone to 'just get on a bike for 45 minutes' isn't realistic — and it isn't always safe.

Here's what actually matters: sustained, rhythmic, low-to-moderate effort that the nervous system can organize around. That's what dual-task treadmill work or a structured PowerPlate circuit can deliver — the same metabolic and mitochondrial stimulus, through a route that accounts for motor control instead of ignoring it.

Zone 2 isn't wrong. It's just incomplete for certain clients. The real question isn't heart rate — it's how you get the benefit without needing perfect motor control to access it.

Todo el mundo habla del cardio en zona 2 para la longevidad. Pero, ¿qué pasa cuando un cliente no puede subirse a una bicicleta o alcanzar una frecuencia cardíaca objetivo por una condición neurológica?

El entrenamiento en zona 2 — esfuerzo sostenido de baja intensidad — es una de las intervenciones de longevidad más citadas. Mayor densidad mitocondrial, mejor oxidación de grasa, salud cardiovascular más fuerte. Pero la mayoría de ese contenido asume una persona sana en una caminadora o bicicleta, entre 60 y 70 por ciento de su frecuencia cardíaca máxima, durante 30 a 45 minutos seguidos.

Para ciertos clientes neurológicos, ese modelo no aplica. La respuesta de la frecuencia cardíaca puede estar disminuida por disfunción autonómica o por medicamentos como betabloqueantes o fármacos dopaminérgicos. Mantener el ritmo es difícil cuando la marcha es inestable o aparecen episodios de congelamiento. Decirle a alguien 'solo súbete a la bici 45 minutos' no es realista — y no siempre es seguro.

Esto es lo que realmente importa: un esfuerzo sostenido, rítmico, de intensidad baja a moderada que el sistema nervioso pueda organizar. Eso es lo que un trabajo de doble tarea en caminadora o un circuito estructurado con PowerPlate pueden ofrecer — el mismo estímulo metabólico y mitocondrial, por una vía que sí toma en cuenta el control motor."

La zona 2 no está mal. Simplemente es incompleta para ciertos clientes. La verdadera pregunta no es la frecuencia cardíaca — es cómo obtener el beneficio sin necesitar un control motor perfecto para lograrlo.

8/11/26: Three Parkinson's Myths - Busted

8/11/26: Tres Mitos Del Parkinson - Desmentidos

Harvard researcher David Sinclair has spent decades studying why we age — and one of his most important findings is this: short, controlled doses of stress actually activate the same survival genes that slow cellular aging.

Exposure to cold. Heat. Fasting. Intense exercise. None of these feel good in the moment. But that's the point. Your body doesn't get stronger from comfort — it gets stronger by recovering from a challenge.

When you stress the system enough, your cells respond by repairing, adapting, and becoming more resilient. Too little stress, and nothing changes. Too much, and you wear yourself out. But the right dose—that's where the magic happens.

This is exactly the principle behind everything we do at NeuroMotor Training.

Dual-task training. Loading at BioDensity. Reaction drills at REAX. None of this works because it's easy—it works because it's a controlled stressor that forces your brain and body to adapt.

For our clients with Parkinson's especially, the nervous system needs a reason to rebuild neural pathways. Comfort doesn't provide that. Challenge does.

So here's something you can try today: give your body a small, safe dose of stress.

A splash of cold water on your face. A short walk before breakfast, on an empty stomach. A few minutes of exertion that gets your breath coming in.

You're not punishing yourself—you're training your biology.

Growth isn't found in the comfort zone. It's found right after it.

And that's true whether you're 30 or 80.

www.karlsterling.com

www.brainbodybones.com

El investigador de Harvard David Sinclair ha pasado décadas estudiando por qué envejecemos — y uno de sus hallazgos más importantes es este: dosis cortas y controladas de estrés en realidad activan los mismos genes de supervivencia que frenan el envejecimiento celular.Exposición al frío. Calor. Ayuno. Ejercicio intenso. Ninguno de estos se siente bien en el momento. Pero ese es el punto. Tu cuerpo no se fortalece con la comodidad — se fortalece al recuperarse de un desafío.

Cuando estresas el sistema lo suficiente, tus células responden reparándose, adaptándose y volviéndose más resilientes. Muy poco estrés, y nada cambia. Demasiado, y te desgastas. Pero la dosis correcta — ahí es donde ocurre la magia.

Este es exactamente el principio detrás de todo lo que hacemos en NeuroMotor Training.Entrenamiento de doble tarea. Carga en BioDensity. Ejercicios de reacción en REAX. Nada de esto funciona porque es fácil — funciona porque es un estresor controlado que obliga a tu cerebro y cuerpo a adaptarse.Para nuestros clientes con Parkinson's especialmente, el sistema nervioso necesita una razón para reconstruir vías neuronales. La comodidad no se la da. El desafío sí.

Así que aquí tienes algo que puedes probar hoy: dale a tu cuerpo una pequeña dosis segura de estrés.Un chapuzón de agua fría en la cara. Una caminata corta antes del desayuno, en ayunas.

Unos minutos de esfuerzo que te hagan respirar con fuerza.No te estás castigando — estás entrenando tu biología.

El crecimiento no se encuentra en la zona cómoda. Se encuentra justo después de ella.Y eso es verdad ya sea que tengas 30 — o 80 años.

For me, it is important to set priorities that become 100% Non-Negotiable.

I have many, including drinking a large glass of water with lemon juice first thing every morning. I stretch every morning without fail. I hydrate every day throughout the day.

I never miss on these things.

What are your non-negotiables?

www.karlsterling.com

Top 5 Reasons NOW Is the Time to Invest in YOU

1. **Insurance premiums just posted their biggest jump in over a decade.** Marketplace premiums rose roughly 26% on average for 2026, and out-of-pocket costs for many enrollees are spiking even higher — some analyses put actual payment increases near 114% — as enhanced subsidies expired. Premiums for the benchmark Affordable Care Act plan soared 26%, on average, with enrollees' actual premium payments expected to spike 114% due to the expiration of enhanced federal subsidies. [CNN](https://www.cnn.com/2026/01/24/economy/health-insurance-premiums-cost-increase) Waiting on the system to get cheaper isn't a strategy — building your own resilience is.

2. **Employer coverage isn't a safe harbor anymore either.** Employer-sponsored insurance costs are projected to increase by 9% for 2026 — the highest growth in fifteen years. [The Century Foundation](https://tcf.org/content/commentary/its-official-americans-will-pay-much-more-for-all-types-of-health-coverage-in-2026-including-medicare/) Even people with "good" coverage are absorbing bigger costs than ever.

3. **Healthcare spending keeps outpacing what your body actually needs from it.** U.S. health care spending rose 7.5% between 2022–2023 and another 7.2% the following year, topping $15,000 per person. [Johns Hopkins Bloomberg School of Public Health](https://publichealth.jhu.edu/2026/navigating-an-unaffordable-health-insurance-market) More dollars are going into the system, but that's not the same as more access or better outcomes for you personally.

4. **Access is shrinking, not expanding.** As many as 21 states lost at least one marketplace insurer for 2026, and Aetna exited the ACA market altogether. [Commonwealth Fund](https://www.commonwealthfund.org/blog/2026/putting-extraordinary-increase-aca-premiums-2026-perspective) Fewer insurers and higher risk pools mean fewer choices right when people need coverage most.

5. **The system is built to treat illness after it happens — not to keep you out of it.** None of the trends above touch prevention, mobility, strength, balance, or neurological health. That work has always sat outside what insurance reimburses well, which means it's on you — and the earlier you start, the more ground you protect before you ever need the system that's getting more expensive and harder to access.

**The bottom line:** healthcare and insurance are both moving in a direction that makes proactive care more valuable, not less. Investing in your training, mobility, and neurological health now is one of the few moves that pays off regardless of what happens to premiums or coverage next year.