Hello,
I have an idea, you could add lactic acid [lactat.e] to the analysis in TP. Just like you can add fat level or weight. Lactat.e measurement in the morning. And lactat.e measurement for each training and general analysis by time [month, two years, week etc..] on the graph.

For example, I do a 9x 600m training and measure lactic acid after 3, 6, and 9 intervals and I would like to save these results in this training. And if I had 10 months of this data, I would like to see it on the graph.

And also separately lactat.e measurement in the morning, as I wrote earlier how it is with weight or fat level.

And the second idea is that if someone does a progressive test, e.g. 8x 5 minutes with lactat.e measurement, then TP would calculate LT1 and LT2 based on this test.

And that these possibilities were also in the mobile application for Android.