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gap average pace totally off during running workouts

The graded adjusted pace (gap) is remarkably slower than my normal average for the interval sections of my workout. And this on a flat course, elevation by garmin is correct.

0 mlascelles over 1 year ago

I noticed the same, and reason is probably that the calculation includes some time and distance before and after the interval in an effort to compensate for inaccurate GPS, and sampling delays. This distance will be run slower than that within the interval making the overall calculated GAP pace come out slower. If you always precede and follow intervals with a few seconds of running at similar pace to that within the interval I predict it will be a lot closer to the average