> ## Content Index
> Fetch the complete content index at: https://longtalkshort.com/llms.txt
> Use this file to discover other available public pages before exploring further.

# Your Normal, Measured: WHOOP's Will Ahmed on Wearables That Spot Illness Early, GLP-1s and the FDA Fight
- URL: https://longtalkshort.com/whoop-will-ahmed-wearable-baseline-ai-coach-fda-blood-pressure/
- Published: 2026-10-30T16:41:27.000Z
- Updated: 2026-10-30T16:41:27.000Z
- Description: WHOOP's Will Ahmed says your wearable baseline can flag illness, show which habits help, and protect muscle on GLP-1s. We check his muscle claim and how WHOOP's blood pressure fight with the FDA really ended.
- Author: Truman
- Tags: Health, Will Ahmed

**If you wear a fitness tracker, you're building a record of your body you never see, and probably wouldn't know how to read.**

On All-In, WHOOP founder and chief executive Will Ahmed argued that this record, combined with an AI coach, is starting to act like **an early-warning system.** He also described the company's fight with the FDA, which matters to anyone whose device claims to measure blood pressure.

*In short: Ahmed says WHOOP members wear the strap nearly all day, and the data can flag illness, show which habits help or hurt you, and support people on GLP-1 weight-loss drugs. Some of those uses push into medical territory, which is where WHOOP clashed with regulators. We checked how that fight ended.*

## 1\. Your baseline is the product

WHOOP has no screen, and Ahmed's pitch is continuity. He says the average member wears it 23.6 hours a day and the company holds **"just over 50 billion hours of continuous physiological data."**

What makes that useful is **your own normal.** Host Jason Calacanis described waking up with a respiratory rate two breaths above his norm and a skin temperature about two degrees higher. Ahmed calls that kind of shift in respiratory rate "pretty meaningful," because the measure is normally so stable.

Ahmed also tells sharper stories about members whose overnight heart rates jumped and who were later diagnosed with serious illnesses. **Treat those as anecdotes, not evidence that a strap detects disease.** The logic still holds: a sudden break from your own normal is worth noticing, even if the device can't say why.

He also explains heart rate variability, the beat-to-beat changes in the gaps between heartbeats. A higher number generally means better recovery, he says, and typical values fall with age.

The strap measures. So what tells you why the numbers moved?

## 2\. The journal is where the insight comes from

Each morning members can log behaviours from a list of more than 100, from alcohol and late meals to saunas and supplements. After enough entries, the app shows what seems to raise or lower your recovery score.

- **Alcohol** is the biggest wake-up call for most people, Ahmed says.
- **Late meals** come next for him. Eating within three hours of bedtime, he says, "we've now seen across the entire WHOOP population is really detrimental to your sleep and your recovery."

Calacanis, who doesn't drink, shared his screen on air: a warm bath with salts, **+7%** on recovery; 1% more of his day in the high-stress zone, **−9%**; vitamin D, **−3%**, which puzzled him. So he asked the AI coach live, and its answer was a model of honesty:

> This is a modest difference and it's a correlation, not evidence, that vitamin D caused the change.

That's the right way to read every number on that screen.

![A bar chart of one person's WHOOP journal readout: warm bath +7% recovery, vitamin D −3%, five more strain points −5%, and 1% more of the day in high stress −9%. A note says these are correlations for one person, not causes.](https://storage.ghost.io/c/d7/93/d793216c-cf13-441f-bdae-4f3aef998c0e/content/images/2026/10/fig1-54.png)

One host's on-air journal results, read as correlations. Our chart from figures shown in the episode. Made for Long Talk Short.

## 3\. An AI coach that knows your data

Ahmed says 80% of members interact with the AI coach and just over half journal daily; Calacanis gave it "a seven and a half out of 10." **The advantage, Ahmed argues, is context:** a general chatbot knows medicine, while WHOOP's coach knows your sleep, strain and blood work.

The company builds its own foundation models on its data and sees early "indications" that physiological signals "might be able to predict that a biomarker is out of range without actually measuring the biomarker itself." **That's a research hint, not a product.** He also stresses: "We do not sell data… you are not the product."

## 4\. If you're on a GLP-1

For many people the most relevant feature is the GLP-1 tracker. Ahmed's warning is that much of the weight lost on these drugs isn't fat:

> Typically speaking, about 50% of the weight that someone loses is fat and 50% is muscle

That, he says, is how people "end up getting quite frail." Calacanis showed his plan: **9,800 steps a day, two strength sessions a week,** daily hydration and protein targets, and a box to check off his dose. The aim is to lose weight without losing strength.

## 5\. The FDA fight, and what it means for you

WHOOP's Blood Pressure Insights feature estimates blood pressure trends after you calibrate it with a regular cuff. The FDA objected. "They actually sent us a warning letter," Ahmed says. "We stuck to our guns." He says the agency has "since updated their guidelines, I think based on our case," and that the feature remains on sale. **WHOOP's ECG feature, by contrast, has formal FDA clearance.**

![A timeline: in July 2025 the FDA sends WHOOP a warning letter about Blood Pressure Insights. In January 2026 the FDA updates its general-wellness guidance. In June 2026 an FDA closeout letter says it won't take action against the modified feature.](https://storage.ghost.io/c/d7/93/d793216c-cf13-441f-bdae-4f3aef998c0e/content/images/2026/10/fig2-42.png)

How the WHOOP blood pressure dispute played out, from FDA letters we checked. Our timeline. Made for Long Talk Short.

## Weighing it: what holds up

**The FDA story holds up, with an important detail.** The FDA's warning letter of 14 July 2025 said Blood Pressure Insights was a medical device sold without clearance. Its closeout letter of 17 June 2026 said that, given WHOOP's changes to the feature and its labelling, and in line with general-wellness guidance updated in January 2026, the agency does not intend to take action. **So WHOOP kept the feature, but in a modified form.** Whether the guidance changed "based on our case" is Ahmed's opinion; the letter doesn't say so.

**Overstated: the muscle figure.** In the STEP 1 trial of semaglutide, a body-scan substudy found about 45% of the weight lost was lean mass, and other studies and reviews often put the share at about 25% to 40%. Lean mass, as these scans measure it, includes water and organs as well as muscle. Protecting muscle is a real concern, so the strength-and-protein advice is reasonable, but "50% muscle" overstates it.

**Company numbers:** when WHOOP raised $575 million at a $10.1 billion valuation in March 2026, it said it had more than 2.5 million members and "more than 24 billion hours" of data. Ahmed's "just over 50 billion" would mean the data set has roughly doubled since that March figure, and his four-million-member target is a projection.

**Not checked:** the 70,000-person blood pressure study, the 80% AI usage, the late-meal finding and the illness anecdotes. Correlations from your own journal are clues to test, not proof.

**Related reading:** for more from WHOOP's science side, see [Kristen Holmes's four habits for a calmer nervous system](https://longtalkshort.com/kristen-holmes-aligned-sleep-regularity-nervous-system/); on why muscle matters as you age, see [Peter Attia's Outlive](https://longtalkshort.com/peter-attia-outlive-summary-medicine-3-0/).

## Long Talk Short

- A wearable's value is your personal baseline: sudden shifts in respiratory rate, temperature or heart rate are worth noticing, even when the device can't explain them.
- The behaviour journal links habits to recovery; Ahmed singles out alcohol and eating within three hours of bed.
- The AI coach's strength is your own data, and on air it correctly called one result "a correlation, not evidence."
- On GLP-1s, protecting muscle with strength training and protein matters, though the 50% muscle figure is higher than trial data suggest.
- Blood Pressure Insights stayed on sale after WHOOP modified the feature and its labelling.

**The one thing to remember:** treat a wearable's alerts as a reason to check, and its correlations as hypotheses, not diagnoses.

Source: ["WHOOP CEO, Will Ahmed: 50B Hours of Health Data, a 4 Million Member Data Moat, & the FDA Fight"](https://www.youtube.com/watch?v=Uc6xXNBWjfc&ref=longtalkshort.com), All-In. This is an independent summary and is not affiliated with All-In or WHOOP.

*Quotes are taken from automatic captions and lightly cleaned. This article is for general information only and is not medical advice. A wearable can't diagnose illness: if your readings or symptoms worry you, or you're starting or changing a GLP-1 medication, talk to a doctor.*