By Limitless LL

Limitless Bike Strategy HR

Ironman Bike Pacing Strategy by Heart Rate

Upload your bike course, enter your maximum heart rate and target Ironman heart-rate intensity, and create a terrain-based pacing plan using pulsacions instead of FTP watts.

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1. Upload Bike Course

GPX supported. The app analyses distance, elevation and terrain changes.

Upload GPX bike course

Using fallback sample course. Upload a GPX file to replace it.


Sample Ironman-style course
Demo course
Sample
—km
—m
—m
—m
—m
—terrain based
Elevation profile · coloured by HR intensity

Terrain-based segments. Heart-rate targets are shown over the mountain profile.

<70%70–78%78–84%84–88%>88%

2. Athlete & Heart Rate Intensity

Target Ironman HR % Max74%

Typical Ironman bike HR is often controlled. 84–90% FCmax is aggressive and mainly useful for testing scenarios.

HR Drift Safety+5 bpm

Adds a warning when climbs or long duration may push HR above the target range.

—bpm
—max - rest
—scenario adjusted
—weighted
—segment target
—marathon risk
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3. HR Pacing Scenarios

4. Terrain Segments

The track is divided by terrain changes. Climbs receive slightly higher HR targets; descents receive lower HR targets for recovery.

SegKmElev +/-GradientTypeTarget HR%HRmaxZoneSpeedTimeCoach note
Limitless LL · Heart Rate Strategy MVP