While the Apple Watch is seen by many as the ultimate wearable fitness tool, it’s somewhat out of place in the gym. The native Workout app has a number of exercise profiles to choose from, including activities that can only be done in the gym. But, in many ways, the Watch is best suited for outdoor activities.

But with the introduction of GymKit, Apple hopes to make the in-gym cardio experience better. Apple’s system to connect the Apple Watch to compatible gym equipment started rolling out across the globe earlier this fall, and it just hit the US this week. Below is everything you need to know about GymKit as an Apple Watch user, how you can use it, and what it means for your workouts in the future.

What is GymKit?

Apple announced GymKit at this year’s WWDC in June as part of the watchOS 4 update. GymKit is a protocol that allows Apple Watches to use NFC and Bluetooth to connect to various pieces of gym equipment. This allows the wearable and the machine to share information so you can glean more information when working out with the Apple Watch.