Apple has offered a rare peek behind the curtain as it seeks to build anticipation for the forthcoming Apple Watch release.
ABC News was given an exclusive behind the scenes look at top secret the health and fitness suite used by the notoriously secretive tech giant during Apple Watch and HealthKit testing.
As it turns out, Apple has been hooking employees up with various sensors and effectively paying them to work out for about two years.
Apple’s senior VP of operations Jeff Williams told the network: “[The employees] knew they were testing something, but they didn’t know it was for the Apple Watch.
“We hooked them up with all the masks and so forth, but we would put on an Apple Watch covered up.”
By suiting participants up with expensive breathing equipment Apple said it was able to glean a better understanding of the number of calories we actually burn when exercising.
Read more: Apple HealthKit: How your iPhone will get you fit
The lab, described by ABC as one of the most advanced in the world, also features climate chambers that can replicate different environments, the video reveals.
“I think we’ve amassed already what may be one of the world’s largest pieces of data on fitness,” Apple’s resident Health guru and former Nike employee Jay Blahnik 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.”
ABC has pulled a YouTube clip showing the report, but it’ll be broadcast on the Nightlife programme at 12:35 ET tonight. Viewers in the United States can check out the videos here.