Focus at progression chart

I try to understand concept of focus. When looking my progression chart, my focus look like flat line at zero value. Is the meaning of that I have been riding samekind of effort all the time?

Good question - it has to do with the scaling on the left-hand side of the chart. Because there was a bit of a gap in your data, the progression focus dropped down to 60 min, which makes seeing some of the smaller differences in focus around 1-10 min a bit harder to see. When you zoom in a bit more, the scaling on the focus line becomes a little bit easier to see: