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Sports calculators
Pace, heart rate zones, one-rep max. 4 tools
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Heart Rate Zone
Calculate your five training heart rate zones from your age or measured max heart rate, using the Karvonen method when you know your resting heart rate.
One-Rep Max
Estimate your one-rep max (1RM) from a set of several reps with the Epley and Brzycki formulas, plus a training-load table.
Race Time Predictor
Predict your finish time for another race distance from a recent result, using Riegel’s formula.