Intervals Workout is a Data Field for Edge 540 and 1050 that reads your Intervals.icu structured workout and guides you in real time, step by step. At a glance: • Current target watts (blue) + 3s actual power (green/red at ±15 W) • Heart rate color-coded by zone (gray, blue, green, orange, red by % of threshold) • Cadence with target (e.g. "target 90 rpm") — green ±5, orange ±10, red beyond • Step name + position (e.g. "Ramp 50 to 75 %FTP 1/10") • Step time remaining + total time • Per-step progress bar Smart guidance: • Beep + vibration 5 s before each step change • Loud beep + double vibration at the end of the workout • "Next: XXX W" alert before the next effort How it works: The app fetches your planned workout (steps, targets, @cadence annotations) directly from your own Intervals.icu account using your personal API key. Your data stays between your device and your account — nothing is sent to a third party. Setup (app settings in Garmin Connect): 1. Athlete ID (e.g. i123456) 2. Intervals.icu API key (free account required) 3. FTP in watts 4. LTHR (threshold heart rate)