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Calories seem to be random

Former Member over 9 years ago

doI do the same ride frequently but the calories calculated vary hugely. Any idea why? Same route, speed, etc...

Does your HR strap provide reliable data for the entire activity?

Here is an old but still relevant article on Garmin's methods of determining Calories. http://www.dcrainmaker.com/2010/11/how-calorie-measurement-works-on-garmin.html