I am starting to think that maybe training for some of these big events should be viewed in terms of time on feet, rather than weekly mileage accrued. By keeping moving, keeping going; whatever form it occurs, is surely a contributor to training for endurance events. It follows that the more active an individual is, the greater their fitness level; for example, a five mile run followed by a walk to the shops / taking the dog out, will be more effective than just a five mile run.
Although running time has been the same, by extending your activity, however innocuously, has inadvertently extended your training. Without you realising.
And part of these endurance events is about just being able to continue being active. So don't underestimate your time on feet. It all counts.
Just a thought.
