'Good Morning America' Goes Inside Apple's Secret Apple Watch Fitness Testing Lab

ABC News this morning revealed an exclusive behind-the-scenes video of Apple's testing facility for the upcoming Apple Watch, showing off dozens of Apple employees covered in various sensor-tracking technology used to gather data for the health and fitness areas of the wearable device. Apple executives Jeff Williams and Jay Blahnik accompanied ABC on a tour of the facility.

Employees of the company, from engineers to managers and developers, have volunteered to participate in the tests for nearly two years, not knowing of the reason behind the facility until recently. Wearing masks that measure changes in breathing and other various statistics, the volunteers were put through various workout regimens including rowing, yoga, and running, in order to collect data for the Watch.


“[The employees] knew they were testing something, but they didn't know it was for the Apple Watch,” said Jeff Williams, Apple’s senior vice president of operations. “We hooked them up with all the masks and so forth, but we would put on an Apple Watch covered up.”

The lab even included "climate chambers", which allowed Apple to simulate varying environments, from hot to cold, without having to physically leave Apple headquarters for testing. The company did so anyway, visiting drastically different locations around the globe to put the Watch through the most strenuous environment testing they could.

“We have traveled to Alaska and gone to Dubai to really test Apple Watch in all those environments, but we also wanted to be able to have a controlled environment here where we could see those extremes,” said Jay Blahnik, Director of Fitness and Health technologies at Apple.

“I think we've amassed already what may be one of the world's largest pieces of data on fitness,” he said. “Our view is, we're just beginning. We think there's a lot to this fitness thing...the impact on health could be profound.”

Dr. Michael McConnell, a professor in cardiovascular medicine at Stanford Medicine, told ABC News the Apple Watch has great potential to drastically change the cardiovascular technology field. He points to the ease-of-use in Apple's product to take measurements and surveys, thanks to the help of Apple's new medical-focused ResearchKit as well as HealthKit, which would offer them "a new way to do medical research."

The pre-launch buzz surrounding the Apple Watch only continues to grow as the April 10 pre-order date, and official launch on April 24, draw closer. Most recently the wearable has been spotted in numerous fitness and fashion magazines, with third-party manufacturers announcing everything from charging stands to carrying cases to secondary battery options for the wrist-worn device.

The segment, which premiered earlier this morning on Good Morning America, is a small preview for a larger piece airing tonight on Nightline at 12:35 AM EST.

Related Roundup: Apple Watch 11
Buyer's Guide: Apple Watch (Buy Now)

Popular Stories

Apple Wallet ID Illinois

Apple Plans to Expand iPhone Driver's Licenses to These 7 U.S. States

Wednesday December 24, 2025 8:40 am PST by
In select U.S. states, residents can add their driver's license or state ID to the Apple Wallet app on the iPhone and Apple Watch, and then use it to display proof of identity or age at select airports and businesses, and in select apps. The feature is currently available in 13 U.S. states and Puerto Rico, and it is expected to launch in at least seven more in the future. To set up the...
maxresdefault

Where's the New Apple TV?

Monday December 22, 2025 11:30 am PST by
Apple hasn't updated the Apple TV 4K since 2022, and 2025 was supposed to be the year that we got a refresh. There were rumors suggesting Apple would release the new Apple TV before the end of 2025, but it looks like that's not going to happen now. Subscribe to the MacRumors YouTube channel for more videos. Bloomberg's Mark Gurman said several times across 2024 and 2025 that Apple would...
iPhone Top Left Hole Punch Face ID Feature Purple

iPhone 18 Pro Launching Next Year With These 12 New Features

Tuesday December 23, 2025 8:36 am PST by
While the iPhone 18 Pro and iPhone 18 Pro Max are not expected to launch for another nine months, there are already plenty of rumors about the devices. Below, we have recapped 12 features rumored for the iPhone 18 Pro models. The same overall design is expected, with 6.3-inch and 6.9-inch display sizes, and a "plateau" housing three rear cameras Under-screen Face ID Front camera in...
iOS 26

iOS 26.2 Adds These 8 New Features to Your iPhone

Monday December 22, 2025 8:47 am PST by
Earlier this month, Apple released iOS 26.2, following more than a month of beta testing. It is a big update, with many new features and changes for iPhones. iOS 26.2 adds a Liquid Glass slider for the Lock Screen's clock, offline lyrics in Apple Music, and more. Below, we have highlighted a total of eight new features. Liquid Glass Slider on Lock Screen A new slider in the Lock...
airpods color prototypes

Apple Tested AirPods in Bright Colors

Saturday December 27, 2025 6:06 am PST by
Apple reportedly tested a version of the first-generation AirPods with bright, iPhone 5c-like colored charging cases. The images, shared by the Apple leaker and prototype collector known as "Kosutami," claim to show first-generation AirPods prototypes with pink and yellow exterior casings. The interior of the charging case and the earbuds themselves remain white. They seem close to some...
maxresdefault

10 Mac Apps Worth Trying in 2026

Wednesday December 24, 2025 9:27 am PST by
2026 is almost upon us, and a new year is a good time to try out some new apps. We've rounded up 10 excellent Mac apps that are worth checking out. Subscribe to the MacRumors YouTube channel for more videos. Alt-Tab (Free) - Alt-Tab brings a Windows-style alt + tab thumbnail preview option to the Mac. You can see a full window preview of open apps and app windows. One Thing (Free) -...
top stories 2025 12 27

Top Stories: iPhone Fold Mockup, Where's the New Apple TV?, and More

Saturday December 27, 2025 6:00 am PST by
Merry Christmas and Happy Holidays from MacRumors! News in the Apple world has unsurprisingly been relatively slow over the past week, but Apple's upcoming foldable iPhone managed to make its way back into the news, while we also shared updates on current and future Apple TV news. iOS 26.3 will be bringing some new features, particularly for users in the EU, so we'll look for additional...

Top Rated Comments

Meandmunch Avatar
141 months ago
I am a freak. Gym never. Jog never, zero days a week.

Can't wait for my watch.
Score: 28 Votes (Like | Disagree)
Sodner Avatar
141 months ago
Anyone who thinks the other smart watches out there like the Pebble are on the same level as the :apple:Watch is sorely mistaken.
Score: 20 Votes (Like | Disagree)
freediverx Avatar
141 months ago
Yet a no time did they think to include GPS in the watch or make it waterproof, i.e. make it a useful sports watch that you can use away from your iPhone. Ah...
The Apple Watch was designed to serve as both a wrist-mounted extension to your iPhone as well as a fitness tracker - all while looking good rather than like some dorky geek toy, and with battery power to last all day.

Adding GPS would have likely killed the all day battery life, or would have required a larger case to accommodate a larger battery.

Making it more water resistant would have required a case designed with gaskets and o-rings around the display, the digital crown, the friends button, the speaker and microphone, and perhaps also the case back containing biometric sensors. Again, this would have made the watch bigger.

A watch without a day's worth of battery power or so bulky that it resembled an Android product would have failed. Good design is all about focusing on the most important goals and making difficult choices.
Score: 8 Votes (Like | Disagree)
GLS Avatar
141 months ago
Anxiously awaiting the Tag Heuer promotional videos where they proclaim how much fitness testing their watches endured.

We all know, however, that Samsung will shove a video on Youtube any day now that shows some disinterested folks using their newest wearable in a fitness type setting
Score: 8 Votes (Like | Disagree)
bbeagle Avatar
141 months ago

However, I am not convinced that the Apple watch really does anything more than other equipment that exists and/or that can be more accurate. Perhaps I am wrong. I just don't see it right now.
The Apple Watch doesn't have to do more to be a success - the Apple Watch is just another way to do the same thing other equipment does, but making it more convenient.

For example, running with music - it's MUCH more convenient to use wireless earbuds and wear a watch than lugging an iPhone on your arm or in your pocket.

Looking at statistics during your run - much more convenient on a watch vs. pulling out a phone (which is difficult when running), or using a FitBit-type device where you can't see stats until you're connected to a computer when you're done.

It's up to the consumer if $350-$1000 is worth this convenience. There are many more.
Score: 7 Votes (Like | Disagree)
ryansimmons323 Avatar
141 months ago
Why does broadcast news/breakfast/daytime television get things so factually incorrect?

They basically rolled Apple Watch, HealthKit and ResearchKit into one thing here.
Score: 7 Votes (Like | Disagree)