Zanzinger - thanks for your input, it's appreciated - really
unfortunately i ain't taking the piss at all - i head off on an easy run, notice my time for the 10 miles was lower than i expected, hence i decide "heck - why not try and beat 1:35:07 over the 13 miles?" - my previous 13 mile PB - to give myself an indication of what i could hopefully expect when i do the GNR next sunday
i would love to beat 1:30 for a half - that's my next goal - i just wanted an idea of whether i could realistically do it, at this stage in my fitness