Thank you. This is a very timely thread for me.
First of all I'd like to acknowledge that I'm not accepting the metrics that my Edge 530 gives me as Gospel. I'm hoping to use them more as a benchmark of my state of fitness on any particular day and watching them to see if I'm improving on those metrics. I recently began riding with a Power Meter, so now, along with the HRM I'm getting reports with a lot more data. I think I've got a pretty good beginner's understanding of everything but it still confuses me at times. Although I'm finding that the more data that is collected over time it seems to be painting a more coherent picture of my health that I can understand. I guess I really don't have much to add regarding this thread's title and it's more of just a warning to most of you that I feel I'll be posting in this sub-forum much more in the near future.
I'm also concerned about how nutrition plays a part in the HRV too.