I lost my diary.. where can I? I have searched everywhere.. no.
Insight of a day:
For increase (or improve?) my strongness (endurance) I need to increase quantity of circles that I run.
But.
I cant in this case run the same time. I need more time for three circles than for two circles.
But.
The day dont care of my enhancement. It has 24 hours and no more.
So.
How can I get better in such situation? May be: not quantity, but quality.
Agile.

В боевом искусстве владения клинком существует понятие о трех ступенях развития мастерства Шу Ха Ри. Шу — следуй правилу, Ха — разрушай правило, Ри — будь правилом.