Apple Watch's heart rate monitor tracks 10 metrics. What they are and why they matter.

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's VO2Max estimator predicts your heart rate's response to exercise uses deep neural networks and physiological ODEs

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 sleep possible apnea

Sep 9, 2024 • Brandon Ballinger

Summarize all your Apple Watch vitals into a health report

Sep 6, 2024 • Wyatt Chang

Can Apple Watch track blood pressure? Not yet—but here's how it would work.

Sep 3, 2024 • Brandon Ballinger

Empirical 2.0: your personal 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 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 Health Monitoring

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