beagle wrote:I do this, off-line, for post row analysis. I create my own spreadsheet with reports for my own training purposes.
IOW, I calculate the percentage of Effective Length divided by Total Length. I use this to identify opportunities to address stretcher location and/or adjustments to reach and layback.
I will say that I am noticing differences between SS rows and HIIT-type sessions, obviously. Also, obviously, there are speed differences between these and even depending on interval lengths and intensities. I am more aware, and pleasantly satisfied, that I am not losing length and being relatively effective, when intensity and ratings increase, and what speeds I am generating as a result of application of power.
Not sure I am answering your question, but I am able to at least evaluate effectiveness and speed differences at different ratings and intensities. I put all the data together and create meaningful reports for myself.
For post-row analysis beyond spreadsheets, you might want to take a look at my web app rowsandall.com. It is free for basic use and doesn't cost much for Premium membership (15 EURO/year). Contact me if you want to know more.
Here is an example chart that you can make:
Here is a graphical report on Wash as measured on my recent outings:
I am open to suggestions for new (derived) metrics, like effective length / total length as suggested by you.
Regarding footstretcher setting and effectiveness, I tried to assess that last Saturday. My write-up is in this blog post:
http://blog.rowsandall.com/2017/05/13/s ... r-setting/
I did 4x250m, two rows in each distance, two rows for each footstretcher setting. I think it is important to do these kind of assessments on quiet water, with as little wind as possible, and rowing in both directions and averaging the split.
The differences that you are looking at may be so small that you have to worry about water temperature and effects of slight differences in wind and waves, when comparing from session to session.