-- Last Updated: Jan-30-13 5:37 PM EST --
... how totally pointless it is to worry about trying to measure non-contributary movements when doing so serves no purpose related to the desired outcome. Bringing up an entirely new way of saying that no method of measurement is perfect in all ways doesn't change the fact that being unable to measure extremely minute course deviations is totally irrelevant with respect to determining the time needed to cover the distance between two points.
Of course, the biggest issue of all is figuring out a way to insure that you actually exert the same degree of effort during comparative trials. Measuring speed accurately enough is easy compared to this part.