> You can’t simply start training today and run a half marathon tomorrow, for example. Particularly bad example - most organised half-marathons occur on a spec

> You can’t simply start training today and run a half marathon tomorrow, for example. Particularly bad example - most organised half-marathons occur on a specific date, which means that there is a deadline for the training. What the author is actually saying is 'unachievable deadlines are pointless', which I largely agree with.