'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

iOS 26 Feature

iOS 26.1 to iOS 26.4 Will Add These New Features to Your iPhone

Saturday October 18, 2025 11:00 am PDT by
iOS 26 was released last month, but the software train never stops, and iOS 26.1 beta testing is already underway. So far, iOS 26.1 makes both Apple Intelligence and Live Translation on compatible AirPods available in additional languages, and it includes some other minor changes across the Apple Music, Calendar, Photos, Clock, and Safari apps. More features and changes will follow in future ...
ios 26 1 liquid glass opaque

iOS 26.1 Beta 4 Lets Users Control Liquid Glass Transparency with New Toggle

Monday October 20, 2025 10:57 am PDT by
With the fourth betas of iOS 26.1, iPadOS 26.1, and macOS 26.1, Apple has introduced a new setting that's designed to allow users to customize the look of Liquid Glass. The toggle lets users select from a clear look for Liquid Glass, or a tinted look. Clear is the current Liquid Glass design, which is more transparent and shows the background underneath buttons, bars, and menus, while tinted ...
iPhone Siri Glow

Some Apple Employees Have 'Concerns' About iOS 26.4's Revamped Siri

Sunday October 19, 2025 7:39 am PDT by
iOS 26.4 is expected to introduce a revamped version of Siri powered by Apple Intelligence, but not everyone is satisfied with how well it works. In his Power On newsletter today, Bloomberg's Mark Gurman said some of Apple's software engineers have "concerns" about the overhauled Siri's performance. However, he did not provide any specific details about the shortcomings. iOS 26.4 will...
iOS 26

iOS 26.0.2 Update for iPhones Coming Soon

Friday October 17, 2025 7:35 am PDT by
Apple's software engineers continue to internally test iOS 26.0.2, according to MacRumors logs, which have been a reliable indicator of upcoming iOS versions. iOS 26.0.2 will be a minor update that addresses bugs and/or security vulnerabilities, but we do not know any specific details yet. The update will likely be released by the end of next week. Last month, Apple released iOS 26.0.1,...
Apple iPad Pro hero M5

New iPad Pro Has Six Key Upgrades Beyond M5 Chip

Saturday October 18, 2025 10:57 am PDT by
While the new iPad Pro's headline feature is the M5 chip, the device has some other changes, including N1 and C1X chips, faster storage speeds, and more. With the M5 chip, the new iPad Pro has up to a 20% faster CPU and up to a 40% faster GPU compared to the previous model with the M4 chip, according to Geekbench 6 results. Keep in mind that 256GB and 512GB configurations have a 9-core CPU,...
maxresdefault

Here's How the iOS 26.1 Transparency Toggle Changes Liquid Glass

Monday October 20, 2025 1:55 pm PDT by
With the fourth beta of iOS 26.1, Apple added a toggle that makes Liquid Glass more opaque and reduces transparency. We tested the beta to see where the toggle works and what it looks like. Subscribe to the MacRumors YouTube channel for more videos. If you have the latest iOS 26.1 beta, you can go to Settings > Display and Brightness to get to the new option. Tap on Liquid Glass, then...
iOS 26

What's New in iOS 26.1 Beta 4

Monday October 20, 2025 1:02 pm PDT by
Even though we're at the fourth beta of iOS 26.1, Apple is continuing to add new features. In fact, the fourth beta has some of the biggest changes that we'll get when iOS 26.1 releases to the public later this month. We've rounded up what's new below. Liquid Glass Transparency Toggle Apple added a toggle for customizing the look of Liquid Glass. In Settings > Display and Brightness,...
HomePod mini and Apple TV

Apple's Next Rumored Products: New HomePod Mini, Apple TV, and More

Thursday October 16, 2025 9:13 am PDT by
Apple on Wednesday updated the 14-inch MacBook Pro, iPad Pro, and Vision Pro with its next-generation M5 chip, but previous rumors have indicated that the company still plans to announce at least a few additional products before the end of the year. The following Apple products have at one point been rumored to be updated in 2025, although it is unclear if the timeframe for any of them has...
kohler toilet sensor

Kohler Launches $600 iPhone-Connected Toilet Camera That Monitors Your Health Through Waste Analysis

Monday October 20, 2025 1:42 pm PDT by
Kohler is expanding its line of bathroom products with Dekoda, an iPhone-connected device that's designed to be attached to a toilet rim (via The Verge). The device's included "sensors" point into the toilet bowl, allowing it to analyze what goes on in the bathroom. According to Kohler, Dekoda is a health tracker that can monitor gut health and hydration, as well as detect the presence of...

Top Rated Comments

Meandmunch Avatar
138 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
138 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
138 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
138 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
138 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
138 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)