CALCULATE your heart rate training zones

Use the calculator below to determine your heart rate training zones based on the Heart Rate Reserve (HRR) formula.

Use the calculator below to determine your heart rate training zones based on the Maximal Aerobic Function (MAF) 180 formula.

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Are you training for a running event? We have 4 week - 6 month training plans for any distance.

Periodization? HR Zones? Taper?

No sweat, it's all built in! You can dispense with the spreadsheets, the calculations, and stop worrying that you might be training the wrong way!