New Study Suggests Apple Watch Heart Rate Sensor Can Detect Early Signs of Diabetes - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

New Study Suggests Apple Watch Heart Rate Sensor Can Detect Early Signs of Diabetes

Cardiogram, a company that offers an app able to break down heart rate data collected by the Apple Watch, today shared the results of a new study that suggests the Apple Watch can be used to detect the signs of diabetes.

Cardiogram researchers teamed up with the University of California, San Francisco and used the Cardiogram DeepHeart neural network to determine that heart rate data collected from the Apple Watch was 85 percent accurate at distinguishing between people with diabetes and people without diabetes.

applewatchheartrate2
For the study, Cardiogram used more than 200 million sensor measurements from 14,011 participants using an Apple Watch or Android Wear device and the Cardiogram app, aggregating data that included heart rate, step count, and other activity.

Prediabetes is a condition that often goes unnoticed and undiagnosed because traditional methods of detection require glucose-sensing hardware. Detection via the Apple Watch and an AI-based algorithm like Cardiogram's DeepHeart has the potential to alert users that there's an issue so they can then follow up with a medical professional.

According to Cardiogram, its study is the first large-scale study that demonstrates how an ordinary heart rate sensor, like the one in the Apple Watch and other devices like the Fitbit, can detect early signs of diabetes. Because the pancreas is connected to the heart through the nervous system, the heart rate variability changes when a person begins experiencing diabetes symptoms.

Over the course of the last year, Cardiogram and UCSF have teamed up to do a lot of research into the potential for wrist-worn heart rate sensors to detect serious health conditions. Previous studies have shown the Apple Watch heart rate sensor's ability to detect conditions that include hypertension, sleep apnea, and atrial fibrillation.

While there's still a long way to go before research proves whether the Apple Watch can officially detect early health problems, Cardiogram plans to implement new features to incorporate DeepHeart directly into the Cardiogram app in the future, which will allow users to be alerted if early signs of disease are detected.

Apple has also launched its own study in partnership with Stanford to determine whether the heart rate sensor in the Apple Watch can be used to detect abnormal heart rhythms and common heart conditions.

You can sign up to participate in the Apple Heart Study by downloading and installing the Apple Heart Study app and wearing the Apple Watch on a regular basis. If the Apple Watch detects an irregular heart rhythm, you'll be contacted by researchers and may be asked to wear an ePatch monitor.

You can also participate in Cardiogram's studies by installing the Cardiogram app and signing up to join the mRhythm study.

Related Roundup: Apple Watch 12
Buyer's Guide: Apple Watch (Buy Now)
Related Forum: Apple Watch

Popular Stories

apple watch series 3 design

Apple Offers Steps to Fix Daylight Saving Time Bug on Apple Watch

Sunday November 1, 2026 3:34 am PST by
Apple has published a support document describing what to do if your Apple Watch continues to show time that's off by one hour after daylight savings time changes. "This incorrect time appears only on the Always On display when your wrist is down," says Apple. "When you activate the display by tapping it or raising your wrist, the time changes to the correct hour." To fix the issue, Apple says ...
siri recap live rewind

watchOS 27.3 Brings Live Rewind and Siri Recap to Apple Watch

Tuesday November 3, 2026 10:35 am PST by
With the first beta of watchOS 27.3, Apple is introducing new Audio Intelligence features it previewed for the Apple Watch Series 12 and Ultra 4 earlier this year. Powered by the S11 chip, Audio Intelligence includes Live Rewind, Siri Recap, Sound Recognition, and Shazam Music Recognition. Sound Recognition and Shazam are already on the watch, but Live Rewind and Siri Recap are now available ...
apple watch series 3 design

Apple Watch Users in Europe Report Daylight Saving Glitch

Monday October 26, 2026 5:26 am PDT by
Some Apple Watch users running watchOS 27 are reporting a daylight saving glitch after clocks went back in the UK and Europe on Sunday. In a MacRumors forums thread, five users – several in the UK and central Europe – say their watch shows the correct time when activated, but the Always-On display keeps showing summer time, leaving it an hour fast. The problem has also been reported in...

Top Rated Comments

Herky68 Avatar
114 months ago
I believe that many of you don't understand just how much effort and expense apple has spent on developing this research program. I signed up late last year, and several weeks ago they notified me that they had read an irregular heart rhythm on my app. I called them, talked to a Dr. on line, they sent me a state of the art medical monitor the size of an Apple watch which is applied with a sticky tape over my heart for 7 days, I kept it attached for a week, sent it back (post payed) and they contacted me within 3 days, they had me contact one of their research Drs. who went over the results of the week long monitor, they saw no further arrhythmia , and gave me confidence that the earlier abnormal pattern was not a problem , readings showed my heart strong, and healthy. My heart has a minor abnormal pattern that I have known about for 45 years, and I've had numerous heart evaluations required by my employers. I have worn a Holter Monitor numerous times, it's bulky , hard to sleep with, and only records a day or two, the device that Apple sent me totally blew me away, light, you can shower with it on, and records on an internal chip an entire week of heart activity. Please give Apple the respect they deserve for truly using their research budget to start the next generation of wearable health monitors. Yes, I'm a Fan.
Score: 21 Votes (Like | Disagree)
114 months ago
Or you could have your doctor test your blood sugar every few months or whenever, thereby catching pre-diabetes early enough to perhaps prevent the full blown thing.
Or you could do both. It's not about choosing one or the other, but integrating daily monitoring into one's life without any additional inconveniences.
Score: 19 Votes (Like | Disagree)
BigMcGuire Avatar
114 months ago
Just signed up for the app and study. Kinda cool how it shows your stats versus other people your age. Also signed up for the heart study. I’m in the Apple Heart Study as well. Hope it helps someone.
Score: 8 Votes (Like | Disagree)
Apple_Robert Avatar
114 months ago
Like Big Mac, I just signed up and am now in both studies. I am all for being a lab rat if it can help me or someone else.
Score: 7 Votes (Like | Disagree)
114 months ago
So, um, will it tell me if I need to eat less meat? Eat more veggies? Drink better beer? Drink more water? Screw better chicks? :eek:

This kind of stuff is approaching clairvoyant...
It won't tell you what to do. It will tell your insurance company what you've been doing...
Score: 5 Votes (Like | Disagree)
jermwhl Avatar
114 months ago
So much negativity in comments lately...
Agreed. It doesn't matter what is posted, there is always blatant negativity. I'm not talking about discussions with rational arguments, I enjoy those. There are just whiny, miserable people on this forum.
Score: 4 Votes (Like | Disagree)
Latest Stories
Siri AI Rumored to Become 'More Like an Agent' as Early as Next Year
Siri AI Rumored to Become 'More Like an Agent' as Early as Next Year
4 hours ago
Apple Taking New Approach to Developing iOS 28 and macOS 28
Apple Taking New Approach to Developing iOS 28 and macOS 28
5 hours ago
Early Apple Black Friday Deals on Apple Watch, MacBook Air, and More
Early Apple Black Friday Deals on Apple Watch, MacBook Air, and More
1 day ago
'Backglow' Lets You Customize New MacBook Pro's Glowing Apple Logo
'Backglow' Lets You Customize New MacBook Pro's Glowing Apple Logo
1 day ago
Top Stories: Apple Product Launches, iOS 27.3 Beta, and More
Top Stories: Apple Product Launches, iOS 27.3 Beta, and More
1 day ago
More Fun iPhone Duo Apps: 30 New Picks to Try
More Fun iPhone Duo Apps: 30 New Picks to Try
2 days ago
Hands-On With Apple's New OLED Touchscreen MacBook Pro
Hands-On With Apple's New OLED Touchscreen MacBook Pro
2 days ago
Apple Store With All-New Design Opening Soon in Southern California
Apple Store With All-New Design Opening Soon in Southern California
2 days ago
Control the Glowing Apple Logo on Your New MacBook Pro
Control the Glowing Apple Logo on Your New MacBook Pro
2 days ago
Apple Shares New 'Apple Card: Apply and Use in Minutes' Ad
Apple Shares New 'Apple Card: Apply and Use in Minutes' Ad
2 days ago
Apple Says More Than 100,000 Apps Optimized for iPhone Duo, Here's What's Still Missing
Apple Says More Than 100,000 Apps Optimized for iPhone Duo, Here's What's Still Missing
2 days ago
Early Black Friday Deals Kickoff With Steep Discounts on Apple Watch Ultras and More
Early Black Friday Deals Kickoff With Steep Discounts on Apple Watch Ultras and More
2 days ago
The MacRumors Show: iOS 27.3 Looks Like a Huge Update
The MacRumors Show: iOS 27.3 Looks Like a Huge Update
2 days ago
Best Buy's Black Friday Event Begins With Sitewide Savings on Apple, TVs, More
Best Buy's Black Friday Event Begins With Sitewide Savings on Apple, TVs, More
2 days ago
Apple Releasing Yet Another Two New Products Next Week
Apple Releasing Yet Another Two New Products Next Week
2 days ago
MacBook Air Drops to Lowest Price in Months With Amazon's $250 Discount
MacBook Air Drops to Lowest Price in Months With Amazon's $250 Discount
2 days ago
Apple Rumored to Drop the iPhone's Action Button Next Year
Apple Rumored to Drop the iPhone's Action Button Next Year
2 days ago
Apple's Extended Return Policy Now in Effect for 2026 Holiday Season
Apple's Extended Return Policy Now in Effect for 2026 Holiday Season
2 days ago
Apple Music Classical Updated With New Icon and Refreshed Design
Apple Music Classical Updated With New Icon and Refreshed Design
2 days ago
OLED iPad Mini, M6 iMac, and New MacBook Pros Available From Today
OLED iPad Mini, M6 iMac, and New MacBook Pros Available From Today
2 days ago
Apple Surveys iPhone Duo Buyers About Crease and Camera
Apple Surveys iPhone Duo Buyers About Crease and Camera
3 days ago
Apple's First Touchscreen Mac is Now Arriving to Customers
Apple's First Touchscreen Mac is Now Arriving to Customers
3 days ago
Claude Gets Personal Finance Feature With Bank Account Linking
Claude Gets Personal Finance Feature With Bank Account Linking
3 days ago
Apple Arcade Adds Crossy Road Rush and NBA 2K27
Apple Arcade Adds Crossy Road Rush and NBA 2K27
3 days ago
Apple's New HomeView Smart Home Hub: Here's How Much RAM It Has
Apple's New HomeView Smart Home Hub: Here's How Much RAM It Has
3 days ago
iPad Mini vs. iPad Air Buyer's Guide: Now Just $50 Apart
iPad Mini vs. iPad Air Buyer's Guide: Now Just $50 Apart
3 days ago
First iOS 27.3 and macOS Golden Gate 27.3 Public Betas Now Available
First iOS 27.3 and macOS Golden Gate 27.3 Public Betas Now Available
3 days ago
Apple Announces a New Mac Sales Record
Apple Announces a New Mac Sales Record
3 days ago
Paid $200 for Logic Pro? Apple Says You Won't Get This New Feature
Paid $200 for Logic Pro? Apple Says You Won't Get This New Feature
3 days ago
Instagram's Edits Video Editor is Now Available on Mac
Instagram's Edits Video Editor is Now Available on Mac
3 days ago