Everything is strange for me with this item. On the one hand, of course, I realize that I am well done, the progress compared to the past and all things are clearly according to the instructions for slow runners. And on the other hand, my idea of a good result and a decent level is constantly pushed back. And even after successful races, the thought often comes that it could be better. For example, I am very satisfied with the result of the marathon in Berlin, and a year ago it seemed to me that "fast" people were running with such a time. And now a good time looks like 3:35 or faster, but not a minute more. Grandpa?