Posted: 04/01/2015 at 18:39
Interesting experiment Orbutt.
I've a couple of races where I've kind of tested it. On each occasion my then recalcitrant Garmin had died in the few minutes before the race and I was forced to run by feel. I got my 10k PB in one and in the other I ran a hilly 7 mile trail race in what was relatively speaking my highest rating race of that year on RunBritain.
I'd assumed that was down to my being restrained by my Garmin - running within myself.
However, in a 10 mile race (with Garmin) I went off too quickly and decided to try and keep it going. I still ran faster than my original target I faded quite badly in the second half. Tactically I got it wrong but still got a decent result.
I think maybe the longer the distance the more you need the Garmin input.