[Newsletter] ⌚ VO2 Max: Your Wearable Is Lying to You · 🥞 Pancreatic Cancer: A Historic Breakthrough · 😴 Sleeping More Than 8 Hours Ages Your Organs Faster
News from the longevity, biohacking, health, and supplement fronts.
Week of May 16, 2026 — ValBiohacker.com
⌚ Opinion — VO2 Max on Wearables: This Number Can Be Completely Wrong (And Send You Into a Panic for Nothing)
You just glanced at your Apple Watch or your Garmin. It reads: VO2 Max = 38. Or 42. Or 51. And you think: is that good? Should I be worried? Am I aging faster than I should?
Take a breath. That number may be completely off.
My personal example — and it’s a good one.
My Whoop shows a VO2 Max of 34. Thirty-four. On paper: borderline “poor,” firmly in the “keep an eye on this” category. Enough to alarm anyone who takes it at face value.
Except last year, I climbed a 6,500-meter mountain in half the expected time. And reached the summit... without being out of breath. So full of energy, in fact, that I danced at the top. Literally.
A VO2 Max of 34 doesn’t dance at 6,500 meters. The algorithm, however, doesn’t know that.
What a Wearable Actually Measures
True VO2 Max is measured in a lab — running flat out on a treadmill, wearing a face mask that analyzes your respiratory gases. That’s the gold standard. It’s demanding, expensive, and nobody does it before their morning coffee.
What your watch does is make an algorithmic estimate based on:
→ Your resting and active heart rate
→ Your age, height, and weight (which you entered)
→ GPS data from your workouts (when available)
In plain terms: your Garmin, Whoop, or Oura doesn’t measure your oxygen consumption. It guesses.
And for devices without GPS — like the Oura Ring or the Whoop, which don’t capture your real-world cardio output — the estimate relies even more heavily on generic statistical models. My Whoop’s VO2 Max of 34 is living proof.
How Wide Is the Margin of Error?
Independent studies comparing wearable estimates to lab measurements have found striking gaps:
→ Garmin: margin of error between ±3 and ±10 points depending on the model and user profile
→ Apple Watch: gaps exceeding 10 points in sedentary or overweight users → Whoop & Oura: no GPS, no direct measurement of cardiorespiratory effort in real conditions — their VO2 Max estimate is particularly rough, based almost entirely on resting heart rate and recovery data
A 10-point gap is the difference between “well-trained amateur athlete” and “sedentary, worth monitoring.” In other words: two people with the same real VO2 Max can see wildly different numbers on their wrists.
Why This Can Send You Into a Panic for Nothing
VO2 Max is a powerful longevity marker — multiple large studies confirm it. A low value is associated with higher cardiovascular risk. But when an algorithm spits out an alarming number on a Monday morning because you slept badly, you were stressed, or you forgot to update your weight in the app... you’re panicking over nothing.
I’ve personally heard from ValBiohacker.com readers in tears because their Apple Watch suddenly showed a VO2 Max drop of 6 points in a single week. After investigating: they had updated their weight in the app.
What You Should Actually Do
→ Use your wearable for trends, not absolute values. If your estimated VO2 Max rises steadily over 3–6 months, that’s a positive signal. If it suddenly drops, look for a logical explanation first (illness, poor sleep, profile data change) before spiraling.
→ Get a real test if you want a reliable number. Sports cardiology centers offer effort tests (CPET) starting at around $100–200. Once a year is more than enough to calibrate what your watch is telling you.
→ The markers worth tracking more than VO2 Max:
Morning HRV (heart rate variability) — more stable, less influenced by noise
Heart rate recovery after effort
Recovery time between sessions
My N=1: I wear an Oura Ring and a Whoop — two of the most sophisticated wearables on the market. My Whoop shows a VO2 Max of 34. Which, according to official charts, puts me in the “worth monitoring” category.
Here’s the twist: I had the same test done at a clinic. Same result — 34. Full mask, treadmill, the whole lab setup. Identical number.
And yet last year, I climbed a 6,500-meter mountain in half the expected time. Reached the summit without being winded.
That’s what my “34” is worth — whether it comes from an algorithm or a laboratory.
What this proves: VO2 Max, even when measured correctly, doesn’t tell the whole story. It doesn’t capture mechanical efficiency, movement economy, effort management, altitude acclimatization, or mental strength. My body can do things the number doesn’t reflect.
When my Whoop or Oura shows something that concerns me, I first look at my HRV for the week, my stress levels, and my deep sleep. And I trust what my body does — not what a number predicts.
Don’t let an algorithm decide your health status.
🥞 Brief — Pancreatic Cancer: A Breakthrough Scientists Had Almost Stopped Hoping For
For decades, pancreatic cancer was a near-certain death sentence. Only 3% of patients with metastatic disease survive past five years. Researchers themselves had nearly given up on finding a targeted treatment.
That’s over.
A new drug, daraxonrasib, developed by Silicon Valley biotech Revolution Medicines, has just demonstrated in a late-stage clinical trial that it doubles median survival in patients who had already failed chemotherapy: more than 13 months versus less than 7 months with chemo alone.
The target? A protein called KRAS, long considered “undruggable” — impossible to hit. Researchers described it as a “greasy ball” that no molecule could latch onto. For 40 years, the scientific consensus was that it couldn’t be done.
“Every time there was an advance, it led to another dumping of dogma. What everybody assumed was true turned out to be wrong.” — Adrienne Cox, University of North Carolina
What makes this breakthrough even more significant: KRAS is mutated in nearly all pancreatic cancers — but also in many lung and colon cancers, the three leading causes of cancer death. Dozens of similar drugs are already in trials.
The FDA has granted accelerated review. Approval is expected by end of 2026. The drug is not a cure — it eventually stops working, and its side effects can be harsh. But for patients who had no options left, this is a revolution.
Some scientists are already calling it the most significant oncology advance since immunotherapy, 15 years ago.
😴 Alert — Don’t Sleep More Than 8 Hours a Night
I know what you’re thinking: “But I’ve always been told to sleep as much as possible!”
New study. New results. And they’re unambiguous.
A team from Columbia University analyzed the biological, lifestyle, and health data of more than 500,000 participantsenrolled in the UK Biobank — one of the largest medical databases in the world. Their tool: 23 biological clocks across 17 organs and systems.
The finding is striking.
The Sweet Spot: 6h24 to 7h48
Too little sleep (under 6 hours): already well-documented — cardiovascular risk, obesity, type 2 diabetes, hypertension.
But too much sleep (over 8 hours) also accelerates biological aging — in the brain, heart, lungs, and immune system.
“Our study shows that too little and too much sleep are associated with faster aging in nearly every organ.”— Junhao Wen, assistant professor of radiology, Columbia University
The golden window: 6.4 to 7.8 hours per night. No more, no less.
What This Changes in Practice
Sleeping more than 8 hours isn’t just “unnecessary” — it’s potentially a warning sign, and a contributing factor in itself. A chronic long sleeper doesn’t outperform a 7-hour sleeper biologically. They age faster.
Bad news for weekend warriors who “catch up” on sleep: sleeping in until 10am after a tough week may be disrupting your biological clocks rather than restoring them.
Previous studies had found that consistent, quality sleep can extend life expectancy by nearly 5 years for men and more than 2 years for women. The new finding: “more is better” does NOT apply to sleep beyond 8 hours.
My Sleep Protocol N=1
→ Personal target: 7 to 7.5 hours of actual sleep (not time in bed — real sleep) → Fixed wake time, even on weekends — it’s the most powerful circadian anchor
→ If you wake naturally before your alarm, get up. Your body got what it needed.
→ If you regularly sleep more than 8 hours and still don’t feel rested: that’s not a luxury, it’s a symptom — thyroid, depression, sleep apnea, B12 deficiency... worth investigating.
Quality always trumps quantity. But quantity has an upper limit. It’s 8 hours.
Original publication: Nature, May 2026
This content is informational and educational. It does not replace personalized medical advice.
Let’s keep going! Forza!
Valérie Orsoni
Biohacker since 1998 | Longevity Expert
Instagram : @valerieorsoni
My fave brands + super promo codes here ==> ValerieOrsoni.com
My made-in-the-usa, clean, no fillers supplement line ==> ZellNova
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