Hi everyone
Am certainly going to try another moniter, though I was sprinting downhill - love it!(not Snowdon today though - too icy - Cwm Penaman) I have to say - it seems less work on my lungs but I guess my legs have to go round faster so my heart goes faster....hmmm ameater sports physiology thoughts on it here! I suspect from what you are all saying there is something amiss with my moniter. I doubt I am 12 sec miling! LOL