After a blockbuster announcement that took over social media and blog feeds alike, here Apple sheds further light on its foray into wearable technology. Jay Blahnik –- Apple’s Director of Health, Fitness Technologies –- walks us through the process by which the Apple Watch is poised to integrate fitness and everyday life. Blahnik explains that the accelerometer, high-sensitivity heart rate tracker, and GPS pairing with the iPhone to calculate a complete portrait of personal activity. This data is all fed through to the Activity app, which is designed to promote sitting less and moving more. For a complete overview of the Apple Watch’s winning formula, enjoy the video above.