Which workout routine works best? Data from 34,369 New Year’s Resolutions measured on Apple Watch.

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Much of our knowledge about exercise comes from small-scale studies done in controlled research conditions. But with tens of millions of us wearing heart rate sensors, like Apple Watch, we can now measure key biomarkers like resting heart rate or heart rate variability continuously. And, more importantly, we can start to figure out which workout routines really drive results. New …

How one person discovered supraventricular tachycardia through his watch.

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Imagine going out for a run with your Apple Watch, seeing your heart rate spike to 200 beats per minute—and having it spiral up even after you stop running. That’s what happened to Matt [1]. When he called an ambulance, he found it he had an abnormal heart rhythm called supraventricular tachycardia. Each year, about 795,000 people are hospitalized for …

Three Challenges for Artificial Intelligence in Medicine

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Why is the world’s most advanced AI used for cat videos, but not to help us live longer and healthier lives? A brief history of AI in Medicine, and the factors that may help it succeed where it has failed before. Imagine yourself as a young graduate student in Stanford’s Artificial Intelligence lab, building a system to diagnose a common …

Cardiogram 1.0: understand your heart rate on Apple Watch

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Apple Watch will record more than 2 trillion heart rate measurements this year [1]. What does all that data mean? Can your watch tell when you’re stressed? Sad? Excited? Can we figure out what types of exercise actually make you healthier? Could it one day detect abnormal heart rhythms? We built Cardiogram for Apple Watch to help people answer those …

Is Pokemon Go making us exercise more? What Apple Watch heart rate data says.

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If you haven’t heard of Pokémon GO by now, read Recode’s summary. It’s already bigger than Tinder, poised to become bigger than Twitter, and implicated in everything from improving mental health to enabling robbery to bringing new foot traffic to restaurants. It’s also being suggested that Pokémon GO is getting everybody to exercise. The American Heart Association recommends you get …

Have an Apple Watch? You can help save a life!

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Today we’re launching the mRhythmStudy, which is a joint study within the Health eHeart effort at UCSF. The goal of this study is to understand how well heart rate data from the Apple Watch compares with data from medical grade devices, and to invite Apple Watch users to donate their heart rate data to help us build an algorithm for …

What do normal and abnormal heart rhythms look like on Apple Watch?

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Almost every month, a news story pops up about somebody whose life was saved by their Apple Watch. As part of the mRhythm Study, we’re analyzing a lot of heart rate data, and decided to write a brief primer on what both normal and abnormal heart rhythms look like when measured on an Apple Watch.Download Cardiogram for your Apple Watch, …

Do you really need 10,000 steps a day?

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We’re often told to walk 10,000 steps per day, but what is the science behind that? Why not 20,000? 5,000? Why step count, and not the type of exercise, intensity, or total minutes? With the advent of Apple Watch and Android Wear, millions of people now have heart rate sensors strapped to their wrist. To answer the questions above, we …

Cardiogram 1.2 for Apple Watch — WatchOS 3 Instant Launch, Dock, and Heart Rate Complications Updates

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We’re excited to announce the release of Cardiogram 1.2 today. It is our debut version on WatchOS 3, which is also launching today to all Apple Watch users worldwide and is packed with lots of cool new features. Here is what’s new.Instant Launch and Favorites Dock New performance updates in WatchOS 3 now allow the Cardiogram Watch app to load …