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Welcome to 4 Minute Fridays, my weekly newsletter, where I reveal cutting-edge tips to help you get lean, boost energy, and live longer.

What's in store for today:

• The hidden reason your healthy diet isn't working
• How to build muscle without doing a single rep
• The mouse I use when home or traveling

Today's issue is brought to you by High Performance Founder Private Coaching.

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Hey friend,

Hello from New York. I'm in town for the Mavik conference, where I'm doing a fireside with Gary Brecka.

I posted the other day about meeting a 98-year-old while getting a haircut.

I asked him the same thing I ask every centenarian I meet: "What's your secret?" His answer: "Scotch."

We both laughed. I think he was at least half serious.

It reminded me of a woman I met on the North Shore of Hawaii. 104 years old, eating tacos and drinking a margarita.

To be clear, I'm not saying alcohol makes you live longer. It's a toxic substance. But I can't ignore what these 2 had in common: they were smiling, they were happy, and a drink seemed to help them relieve stress and enjoy the day.

Most of what extends lifespan will come from medical breakthroughs, not minor tweaks.

That's why I focus on healthspan instead. There's no point living to 120 if 20 of those years come with a low quality of life.

Should you drink to live longer? That's not my call to make. But maybe happiness counts for more than we think.

Here's what caught my attention this week.

Here is your 4 Minute Friday:

1. New Study Shows Why Your Healthy Diet Isn't Working

The common advice you hear from grandma is to eat your fruits and veggies. But what if she was only half right?

A new study from Nature Microbiology found that your gut bacteria transform over 775 plant compounds into forms your body can actually use. About 67% of all gut bacterial enzymes are involved in this process.

When researchers compared healthy people to those with gut-related diseases, the sick group had a significantly reduced ability to convert healthy food into beneficial compounds.

Fruits and vegetables protected against gut inflammation, but only when healthy gut bacteria were present. Without them, the protection mostly disappeared.

Something I tell clients: eating healthy is only half the equation. You also need to take care of the system that processes what you eat.

Fermented foods, fiber diversity, and minimizing unnecessary antibiotics are a start. In the next High Performance Journal, I'll share a full guide on building amazing gut health.

2. How To Build Muscle Without Doing a Single Rep

Most people assume you need full reps through a full range of motion to build muscle. Turns out that might not be true.

A recent study had trained lifters do leg extensions with one leg using full reps and the other using isometric holds, pushing against an immovable machine with the knee fully bent.

After 6 weeks, both legs grew almost identically. The isometric leg actually trended higher (1.9% vs 0.8%), but the difference was too small to be statistically clear.

The key: the holds were done at long muscle lengths near the bottom of the movement. Multiple studies have shown that training in a stretched position drives more growth than shortened positions.

I'm not saying ditch full reps. But if you're injured, traveling, or short on equipment, isometric holds at long muscle lengths are a legit tool for building muscle.

This lines up with something I believe more and more: we don't know as much about lifting as we think.

Isometrics, rest-pause training, myo-reps ... I've used all of these to build muscle at 46.

There are many ways to skin a cat, and isometrics might be one of the most underrated.

❤️ My Favourite Thing this Week

My travel desk setup has 3 things: a laptop stand, a keyboard, and a mouse I refuse to leave home without.

It's the Logitech MX Master 3S. I've got an affiliation with the brand. I just think it's the best wireless mouse I've ever owned.

It tracks on almost any surface, so I never pack a mousepad. The scroll wheel spins free when you flick it, which sounds like a gimmick until you're flying through a 40-page doc.

The best part is the shape fits your hand so long sessions don't wreck your wrist.

If your mouse is due for an upgrade, this is the one. You can check it out over here.

Client of the week - Henry, Entrepreneur

Henry is an entrepreneur who struggles with low energy and a beer belly. He wanted to get in shape to improve his health, boost his energy levels, and become a 2.0 version of himself.

In 12 weeks, he lost 34 pounds and 7 inches from his waistline, and his energy levels are through the roof!

Here's how we did it:

• We traded cardio sessions for strength training to build muscle and boost metabolism.
• We automated his diet from hyper-processed foods to single-ingredient, nutrient-dense sources.
• Slowly but surely, we changed his mindset to craving exercise and eating healthy foods.

The best part is he's feeling more confident in himself and is enjoying his newfound energy levels.

​Are you an entrepreneur who wants to drop the fat, gain muscle, and boost energy? Click this link to apply for our coaching program.​

One Quote to Finish Your Week Strong

I was on the Mastermind call with our coaching clients, and we got to the topic of creating change.

I told them, "Change is going to hurt. No version of it feels comfortable, but staying the same hurts too. It just sends the bill later in the form of regret."

You're going to feel pain either way. You might as well choose the pain that pays you back.

As promised, get healthier in under 4 minutes.

- Dan

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References

1. Zhang, L., Marfil-Sánchez, A., Kuo, TH. et al. Gut microbiome-mediated transformation of dietary phytonutrients is associated with health outcomes. Nat Microbiol 11, 94–110 (2026). https://doi.org/10.1038/s41564-025-02197-z
2. Dorian Varovic, Kristian Zganjer, Milo Wolf, Patroklos Androulakis-Korakakis, Brad J. Schoenfeld, and Pavle Mikulic. 2025. The effects of long muscle length isometric versus full range of motion isotonic training on regional quadriceps femoris hypertrophy in resistance-trained individuals. Applied Physiology, Nutrition, and Metabolism. 50: 1-14. https://doi.org/10.1139/apnm-2025-0238​

Disclaimer: This email is provided for educational and informational purposes only and does not constitute providing medical advice or professional services. The information provided should not be used for diagnosing or treating a health problem or disease, and those seeking personal medical advice should consult with a licensed physician.

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