Custom Zones
Create zones for any activity stream, not just power, HR, and pace. Anchor zones to FTP, LTHR, or your own custom fields. Use custom zones for workout prescription, time-in-zone analysis, and tracking zone changes over time.
Zones Your Way
Custom zones go far beyond the standard power and heart rate models. Define zones for any activity stream with full control over boundaries, colors, and anchoring.
- Create zones for any activity stream including custom streams
- Anchor zones to FTP, LTHR, or custom activity fields for dynamic adjustment
- Custom colors and names for each zone
- Overlapping and non-contiguous zone support
- Time-in-zone tracking on every activity
- Use custom zones for workout prescription (e.g. "4m CZ2")
- Plot zone boundaries on fitness charts, activity timelines, and histograms
- Share custom zone sets with the community
More in Track Your Progress
Fitness Chart
Track your long-term fitness progression with the classic Performance Management Chart. Download historical data from Strava, Garmin, and more to see your complete training history. Automatic eFTP estimation from single maximal efforts keeps your zones up to date.
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Multisport
Separate zones and settings per sport. Whether you ride, run, swim, row or do all four, Intervals.icu tracks each discipline independently with appropriate metrics and calculations.
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Power Curve
Compare your power curve across seasons, view watts per kilogram, and estimate your MAP. Multiple modelling algorithms including eFTP, Morton's 3P, and Monod & Scherrer help you understand your strengths.
Learn more →