File:Heart-Rate-Zones-Comparison.svg

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Original file (SVG file, nominally 760 × 470 pixels, file size: 8 KB)

One hypothetical runner (maximum heart rate 180, LT1 145, LT2 165 bpm) shown in three zone systems on a shared heart rate axis: the three-zone model from measured thresholds, a custom five-zone scale that keeps LT1 and LT2 (cuts at 130 and 173 bpm are illustrative), and Polar's default five zones (50–100% of maximum heart rate). A line at 140 bpm crosses Z1 of 3, Z2 of 5 (custom) and Z3 of 5 (Polar).

Original diagram drawn for Fellrnr.com with Claude (AI), generated from numeric coordinates: x = 40 + (bpm − 80) × 6.8.

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Date/TimeThumbnailDimensionsUserComment
current08:28, 11 November 2026Thumbnail for version as of 08:28, 11 November 2026760 × 470 (8 KB)Fellrnr (talk | contribs)Recoloured by zone number using pale Garmin zone colours (1 grey, 2 blue, 3 green, 4 orange, 5 red) to match the worked-example table
20:53, 10 November 2026Thumbnail for version as of 20:53, 10 November 2026760 × 470 (7 KB)Fellrnr (talk | contribs)Figure for the Heart Rate Zones draft: one runner, three zone systems on a shared bpm axis

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