Name: Heart Rate Threshold
Rating: 5 (1 reviews)
Author: torsteinvh

This data field shows the heart rate as percent of maximum. The background color is changing depending on how much the heart rate is above a defined treshold. 
To aid when doing intervals, when the heart rate has been above the defined threshold, and drops back below another defined threshold, the background color turns green to show you are recovered and ready for the next interval. Since color is a lot easier to notice than a small change in a number, the idea is that a quick glance at the watch should be enough to tell you if you are inside or outside your defined zones. 
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This version supports user configurable heart rate zones on watches supporting Connect IQ 1.2.1.
How to change settings: https://apps.garmin.com/settingsHelp
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The following settings are available (Defaults are provided for watches not supporting user settings):
- Display HR as % of max HR (Default: On)
- Recovery Threshold (Background turns green when HR is below this value. Default: 120 BPM)
- Normal Threshold (Background turns white when HR is above this value. Default: 125 BPM)
- Warn Threshold (Background turns yellow when HR is above this value. Default: 155 BPM)
- Alarm Threshold (Background turns red when HR is above this value. Default: 166 BPM)
- HR Max (Default: 194 BPM)
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The data field should automatically adjust to any layout chosen, but the field dimensions in the simulator and on the watch aren't identical, so some small layout errors may be present.
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Support thread: https://forums.garmin.com/showthread.php?230211-Datafield-Heart-Rate-Threshold&p=559505
Feedback on the concept is very welcome!
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For more advanced Heart Rate data fields take a look at:
Heart Rate Zone Distribution: https://apps.garmin.com/en-US/apps/c24736fa-3df9-4a2c-a1d7-f780553b5eb7
Heart Rate Zone Interval: https://apps.garmin.com/en-US/apps/713b901b-2227-4794-8e77-95177a7894ed
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Development history:
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Version 0.7 - November 24, 2015:
 - Supports user settings
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Version 0.5 - April 03, 2015:
 - Initial version.