When the Apple Watch was first introduced two years ago, there was one big question that people kept asking: Why should I get this over a regular watch? Since then, the answer has become clear: With its heart rate and step tracking, variety of apps, and customizable sport bands, the Apple Watch has become the perfect companion for fitness buffs.

Apple is well aware of this, and at its Worldwide Developers Conference this week, the tech juggernaut announced a new version of WatchOS that adds a number of exercise-focused features for all models of the Apple Watch. We've broken down the new functions piece-by-piece so you know what to expect when WatchOS 4.0 launches later this year.