While you’ve always been able to customize Apple Watch workouts, the company finally added the ability to create custom interval workouts in watchOS 9. That’s clutch for any athlete itching to set a PR at their next race or just looking to switch up their training routine.
Previously, the only workaround for interval training on the Apple Watch was the segments feature. At any time during an activity, you could double-tap the screen to make note of a significant section of your workout….
