HRV (Heart Rate Variation) is an indicator of fitness. But how best to see this. Polar has software with a program called OwnOptimizer built in. This uses HRV in an orthostatic test to test overtraining. Overtraining affects HRV by diminishing it. But it is a little harder to use HRV in a positive way. For example, look at my test results this morning. The "amplitude" of the RR wave is good, tailing off slowly after standing to less amplitude and less HRV.
The different measures of HRV are shown. The RR bar graph shows good HRV, as does the one to the right, which is simply different heart rates over the 8 minute time period.
The waves show good high-frequency HRV (the yellow). So do the non-linear graphs on the bottom (the Poincare plot in particular). The lower-right-most graph shows a "bend" counter-clockwise (green) versus the lower (red).
All in all, these Kubios HRV measures show satisfactory HRV during an ortho-static test. They were recorded by my Polar 810i. The saved *.hrm file is readable by Kubios. This is a good bench mark, or starting point. We'll see how these measures change as I move to a more demanding exercise routine.
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