Saturday, 23 April 2011

Calibration and distances...

Tried to calibrate my running chip (Nike+ system). I don't get it. I used the google maps to give me a precise distance (770m), and my kit recorded a distance of 788m, which can be partly explained by having to weave a bit and slightly ambiguous turn point. BUT, when running the Half marathon in March, this same kit was being pessimistic, saying I was running less far than the mile markers were in fact indicating.
I feel the need to learn how courses are in fact measured - Marathon Talk actually said that this is a profession so there must be some info on this somewhere.

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