Heart Rate Training Zones Calculator, Karvonen Method

Enter your resting heart rate (HRrest), your maximum heart rate (HRmax), and click the calculate button to show your target HR zones.

 
 
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Results

Karvonen Intensity Zone HR
Zone I - Overdistance, Long-Distance-Slow
Zone II - Endurance, Strength, Body Speeds
Zone III - Endurance, Strength
Zone IV - Intervals, Uphill/Vertical, Race Pace
Zone V - Racing, peaking sprints