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I've been looking about for an event to do and thought 'maybe the Dublin marathon'. Then I looked at the date and figured I've been slacking too much to train for it. I looked at a couple of training plans just to see if I could start at week four or five of sixteen week plan, but I'm not really there. One put up a big warning in red that I risked injury or death unless I'd started the programme in June, fair enough.
Then I tried the Smartcoach calcualtor. Try putting in 25 minute 5K, 6-10 miles per week currently, moderate training 13 weeks and see what comes out.
I say nothing against the calculator, but this is just a case of putting silly figures in and getting an unrealistic answer isn't it ?