hi there i am a 37 yr old engineer with dodgy knees and a bad back lol i have been running a bit in the gym (yes on a treadmill ) i know this doesnt really help me get a feel but i REALLY want to be able to do the london marathon in 2012 i have applied and fingers crossed ....anyway heres my point should i start traing on cross country just to build up my stamina and distance with less chance of getting run over ! or should i start as i mean to go on and train just on road surfaces ?? as the london marathon is all road i was just wondering
thanks
ps all your previous answers have made good reading
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tony anderson 4
i know this doesnt really help me get a feel but i REALLY want to be able to do the london marathon in 2012 i have applied and fingers crossed ....anyway heres my point should i start traing on cross country just to build up my stamina and distance with less chance of getting run over ! or should i start as i mean to go on and train just on road surfaces ?? as the london marathon is all road i was just wondering 
