How different wearables measure HRV: SDNN vs RMSSD

Every formula to measure HRV

Mar 24, 2026 • Brandon Ballinger

Lp(a) testing is up 22x in the last decade. It's now recommended for everyone.

Mar 22, 2026 • Brandon Ballinger

How to find potassium-rich foods for blood pressure

Mar 20, 2026 • Brandon Ballinger

Partnering with Beacon Health to help Medicare patients with heart disease

Mar 18, 2026 • Brandon Ballinger

What cardiovascular medications does Medicare cover?

Mar 17, 2026 • Brandon Ballinger

Normal cholesterol levels (2026 guidelines)

Mar 14, 2026 • Brandon Ballinger

New cholesterol guidelines recommend earlier treatment

Mar 13, 2026 • Brandon Ballinger

Autopilots vs. copilots in vertical AI

Mar 9, 2026 • Brandon Ballinger

Blood tests for heart health

Mar 3, 2026 • Brandon Ballinger

Three main saturated fats raise your cholesterol

Feb 28, 2026 • Brandon Ballinger

Heart attack deaths are rising in young adults. Here's why.

Feb 27, 2026 • Brandon Ballinger

Empirical Health for Web: Now Available on Desktop

Feb 17, 2026 • Wyatt Chang

The government wants AI doctors

Feb 17, 2026 • Brandon Ballinger

Bryan Johnson's Immortals program costs $1m. How to DIY 90% of the value for <1% of the price.

Feb 12, 2026 • Brandon Ballinger

Do rich people live longer?

Feb 6, 2026 • Brandon Ballinger

Men's heart risk rises by age 35, 7 years earlier than women

Jan 31, 2026 • Brandon Ballinger

Vitamin D cuts heart attack risk by 52%. Why?

Jan 30, 2026 • Brandon Ballinger

Direct-to-consumer advanced lipid panel with ApoB, Lp(a), and hs-CRP

Jan 23, 2026 • Brandon Ballinger

AI beyond LLMs: a wearable foundation model based on JEPA.

Dec 10, 2025 • Brandon Ballinger

Instead of Giving Stuff, Give Years

Nov 25, 2025 • Brandon Ballinger

The best biomarkers for heart health

Nov 7, 2025 • Brandon Ballinger

Cardiogram app alternatives

Nov 6, 2025 • Brandon Ballinger

How fiber reduces overall mortality by 23%

Oct 28, 2025 • Brandon Ballinger

Peter Attia on 60 Minutes: Medicine 3.0 and the marginal decade

Oct 26, 2025 • Brandon Ballinger

The four horsemen from Peter Attia's Outlive

Oct 25, 2025 • Brandon Ballinger

How to use AI to calculate nutrition facts

Oct 24, 2025 • Brandon Ballinger

Apple Watch hypertension alerts explained

Oct 17, 2025 • Brandon Ballinger

ApoB is not usually covered by Medicare or insurance, but can be cheap.

Oct 16, 2025 • Brandon Ballinger

The biomarkers recommended by Peter Attia in Outlive

Oct 11, 2025 • Brandon Ballinger

Inflammation now predicts heart health even more than LDL cholesterol

Sep 29, 2025 • Brandon Ballinger

Simulating Reductions in Lifetime Heart Attack Risk

Sep 17, 2025 • Brandon Ballinger

How Apple Watch's new blood pressure monitor works

Sep 13, 2025 • Brandon Ballinger

Why choose Empirical for 100+ biomarkers

Aug 20, 2025 • Brandon Ballinger

Why ApoB is more accurate than LDL cholesterol

Jul 27, 2025 • Brandon Ballinger

How to Get a Sleep Score on Your Apple Watch

Jul 22, 2025 • Brandon Ballinger

The effect of noise on sleep

Jun 26, 2025 • Brandon Ballinger

Apob vs Lp(a) blood tests for heart health

Jun 22, 2025 • Brandon Ballinger

Data-driven nutrition: how to go beyond generic diet advice

Jun 11, 2025 • Wyatt Chang and Brandon Ballinger

How to lower your ApoB naturally and with medication

May 28, 2025 • Brandon Ballinger

How to Lower Your Cholesterol in 7 Days

May 23, 2025 • Raquel Rodriguez Martinez, MD, MPP

Function Health alternative in NY & NJ

May 11, 2025 • Brandon Ballinger

Function Health Alternatives

May 10, 2025 • Brandon Ballinger

Don't die of heart disease

May 8, 2025 • Brandon Ballinger

Lp(a): the strongest hereditary risk factor for heart disease

May 1, 2025 • Brandon Ballinger

Apple Watch's calorie counts can be accurate within 18-40%—if you follow these steps.

Apr 19, 2025 • Brandon Ballinger

Cutting ApoB by 10 mg/dL drops heart disease risk by 9%

Apr 16, 2025 • Harish Kilaru

Apple Watch can't predict a heart attack—these blood tests can

Apr 12, 2025 • Brandon Ballinger

How to calculate your heart attack risk with <$200 of blood tests

Apr 3, 2025 • Brandon Ballinger

Am I Healthy? How to design a comprehensive health score

Mar 26, 2025 • Raquel Rodriguez Martinez, MD, MPP

Apple Watch's heart rate monitor is accurate to 5bpm 89-98% of the time

Mar 25, 2025 • Brandon Ballinger

Empirical Health Radar: One number, infinite insights.

Mar 12, 2025 • Raquel Rodriguez Martinez, MD, MPP and Harish Kilaru

Your guide to Apple Watch's heart rate monitor

Mar 4, 2025 • Brandon Ballinger

Empirical Health launches today on Android, WearOS, and Fitbit

Feb 20, 2025 • Wyatt Chang and Brandon Ballinger

Which health metrics are available on Samsung, Pixel, Apple Watch, and Fitbit?

Feb 18, 2025 • Brandon Ballinger

How to Do a "Poor Man's Tilt Table Test" on Your Apple Watch

Dec 11, 2024 • James Russo

How Apple Watch uses deep learning to estimate VO2Max

Nov 20, 2024 • Brandon Ballinger

Breathing Disturbances on Apple Watch: What should I do if I get a “possible sleep apnea” alert from my Apple Watch?

Oct 23, 2024 • Raquel Rodriguez Martinez, MD, MPP

How Apple Watch estimates VO2Max to 1.2 ml/kg/min without a treadmill test

Oct 22, 2024 • Brandon Ballinger

The average Apple Watch user gets 49 minutes of deep sleep per night

Oct 8, 2024 • Brandon Ballinger

How to track your mental health with PHQ-9 and GAD-7

Sep 24, 2024 • James Russo and Raquel Rodriguez Martinez, MD, MPP

How Apple Watch detects 89% of severe sleep apnea

Sep 9, 2024 • Brandon Ballinger

Summarize all your Apple Watch vitals into a health report

Sep 6, 2024 • Wyatt Chang

Empirical 2.0: your AI healthcare assistant

Jul 2, 2024 • Brandon Ballinger and Raquel Rodriguez Martinez, MD, MPP

Cardiovascular metrics predict sleep apnea risk

Jun 7, 2024 • Brandon Ballinger

How to correlate your Apple Watch health metrics with symptoms

May 23, 2024 • Brandon Ballinger

How to do the CHOP protocol for POTS on your Apple Watch

Dec 21, 2023 • Brandon Ballinger

Empirical Health is launching to 47 million midwesterners

Dec 12, 2023 • Brandon Ballinger

Can my Apple Watch tell me if I have afib?

Dec 5, 2023 • Raquel Rodriguez Martinez, MD, MPP

The CHOP protocol and the science behind it

Oct 26, 2023 • Raquel Rodriguez Martinez, MD, MPP

The best Apple Watch for heart monitoring (2025)

Oct 19, 2023 • Brandon Ballinger

The connection between long COVID and POTS

Oct 19, 2023 • Raquel Rodriguez Martinez, MD, MPP

What are some of the most common POTS triggers?

Oct 5, 2023 • Raquel Rodriguez Martinez, MD, MPP

Do I need a tilt table test to confirm a POTS diagnosis?

Sep 27, 2023 • Raquel Rodriguez Martinez, MD, MPP

Is the Apple Watch's oxygen sensor accurate?

Sep 13, 2023 • Brandon Ballinger

Sleep apnea and the link to cardiovascular health: what you need to know

Aug 30, 2023 • Raquel Rodriguez Martinez, MD, MPP

How far is 10,000 steps?

Aug 23, 2023 • Raquel Rodriguez Martinez, MD, MPP

My Apple Watch says I have low blood oxygen while sleeping.

Aug 15, 2023 • Raquel Rodriguez Martinez, MD, MPP

What are the steps to get a POTS diagnosis?

Aug 8, 2023 • Raquel Rodriguez Martinez, MD, MPP

Why is it so hard to find a primary care doctor near me?

Aug 2, 2023 • Raquel Rodriguez Martinez, MD, MPP

Empirical Health: proactive primary care that scales

Jul 18, 2023 • Brandon Ballinger

What is HRV and what does it have to do with health?

Jun 14, 2023 • Raquel Rodriguez Martinez, MD, MPP

How to show sleep stages on your Apple Watch face

Feb 24, 2023 • Brandon Ballinger

Want better sleep quality? The top 3 factors, according to Apple Watch data

Jan 9, 2023 • Brandon Ballinger

Is my data normal? Introducing Empirical Checkups

Nov 28, 2022 • Brandon Ballinger

Empirical Sleep for watchOS 9

Sep 16, 2022 • Brandon Ballinger

Apple Watch's new temperature sensor

Sep 14, 2022 • Brandon Ballinger

Empirical Sleep for Apple Watch

Jul 15, 2022 • Brandon Ballinger