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How are calories calculated in the Wahoo Fitness App?

Calories in the Wahoo Fitness app are calculated using an algorithm.  The calculation is made once per second and is different for men and women:

Men

  • calorieBurnRate = abs(((0.6309 * newHeartrate) + (0.09036 * weightInPounds) + (0.2017 * userAge) - 55.0969) / 4.184)

Women

  • calorieBurnRate = abs(((0.4472 * newHeartrate) - (0.05741 * weightInPounds) + (0.074 * userAge) - 20.4022) / 4.184)

 

Additionally, when BPM goes below 65% of max heart rate, Basal Metabolic Rate (BMR) is used in lieu of the algorithm, calculated as follows:

Men

  • BMR = 66 + (13.7 * weightKg) + (5 * heightCm) - (6.8 * ageYears)

Women

  • BMR = 655 + (9.6 * weightKg) + (1.8 * heightCm) - (4.7 * ageYears)