Ready, steady… goStart slow. You will feel lousy before the marathon because of tapering, then when you start you’ll suddenly feel wonderful. Your body hasn't really changed so don’t revise your target pace because you feel good at mile five, or 10 or 15. You

This week's reader completed the London Marathon using a run/walk strategy – but she now wants to cut out the walks altogether, and it's not proving too easy. Can you offer any advice? "I'm getting really annoyed with myself. I trained for FLM using

:48 and on that day I passed through the half at 1:47 and 25km at 2:09, which was also a PB. I think it works better for longer distances - I've done sub four minutes for 1K and 23 mins for 5K but never dipped under 48 for 10K. I can run fast for short distances