I’m a data nerd and one of the reasons I love my Garmin is to see how accurate the data is that it is collecting.

Race prediction times have been a feature of Garmin for some time now. Unfortunately, I don’t really have much faith in these predictions. According to the data in the past, I should have be able to run ~3:11 marathon which would be lovely but not realistic for my fitness level at that time. Even if the data is not so accurate, I like to see how the data improves and use it to inform my training. It’s like energy modeling, you really look at the relative change, not the exact numbers.

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