All the training guides warn against trying to get in "junk miles." In other words, they aren't real keen on mileage undertaken just for the sake of mileage. Part of the reason is that junk miles increase the risk of injury. In addition, junk miles tend to be unplanned and serendipitous--and thus, they are not a part of a balance training plan.
The thing is, when no balanced training plan is actually possible due to persistent scheduling conflicts, junk miles are better than no miles at all. So today, I cobbled together nine junk miles--which was glorious indeed.