Inflection Target Heart Rate Calculator

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Enter information

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Athlete name

Date

Age (years)

Enter an age from 18 to 100.

Resting HR (bpm)

Enter a resting heart rate from 30 to 120 bpm.

Known max HR (optional)

Enter 100 to 240 bpm, or leave blank.

Maximum HR used -- bpm

Heart-rate reserve -- bpm

ZoneIntensityTarget range

1Easy (A1)50-60% HRR --to--bpm

2Moderate (A2)60-70% HRR --to--bpm

3Steady (LT)70-80% HRR --to--bpm

4Hard80-90% HRR --to--bpm

5Maximum90-100% HRR --to--bpm