Swimming Training Zone Calculator
Calculate swimming training zones using Critical Swim Speed. Includes pace zones for pool and open water.
About Swimming Zones
Swimming training zones are primarily pace-based since heart rate response is different in water (lower max HR, delayed response). Critical Swim Speed provides the threshold anchor for all swimming training zones.
Auto-Calculate from Your Data
Upload Strava, Garmin, or Intervals.icu exports to estimate your zones
Strava vs Garmin vs TrainingPeaks: Zone Differences
Different platforms calculate training zones differently. Here's what each expects:
Uses simple % of max HR. Zones are fixed percentages. Cannot customize.
Supports both %Max HR and %HRR (Heart Rate Reserve). Fully customizable zones.
Uses LTHR-based zones. Supports pace, HR, and power. Highly customizable.
Uses either method. Includes sport profiles with different zone settings.