watchOS 9 brings expanded metrics for workouts including ground contact time for runs, and trackable heart rate zones for various activities. Alongside wellness features like AFib history, the new Apple Watch Series 8 unleashes breakthrough innovations for women's health with the introduction of a body temperature sensor., To learn more, take a look at our "Far out" Apple event recap detailing the iPhone 14 lineup, Apple Watch Series 8, Apple Watch SE (2nd generation), and the Apple Watch Ultra.