@ Speedy - not a very useful comment I think!
@ Mark - did a fairly extensive search on Polar.fi just to make sure I was correct in my assumption. The foot pod most definitely does NOT use your stride to measure distance, but rather acceleration and maths (see article
http://support.polar.fi/PKBSupport.nsf/ALLDOCS/422...)
but I see reading the article further that it does use the foot angle for calculations as well, so maybe this could be an explanation!
So I guess now the question is which distance is more accurate? up or down :)