I found that some of the questions from your MAHR algorithm could go either way for me, leaving me with a variable of 10 bpm. Because of this I had my physiology tested at a sports science clinic. An initial test gave me a "Base" heart rate range of 160-169 bpm, where as a re-test a month later (the sensors for determining carbohydrate vs fat calories used were off on the initial test) gave me a "Base" range of 153-166.
I feel I should mention that the technician administering the re-test directed a much better warm up, and there were no lactate blood-draws (i.e. no rest intervals between exertion levels) on the re-test.
What, if any, information can I use from this test?