Originally Posted by
chasm54
Yes, but "what effect the work you're doing is having on you" is pretty damned important.
Read
this and let me know your opinion. It seems pretty clear, to me, that HR and power are telling you different but equally useful things and that to use power without reference to HR is to ignore a highly relevant set of data.
Oh, that's hardly unbiased:
With advanced metabolic testing, similar to the type performed by Sigma Human Performance
Yep, buy their testing. Based on HR.
HR is all over. It's affected by temperature, diet, sleep, fatigue levels, hydration, phase of the moon, migration patterns of Norwegian lemmings, and damn near everything else under the sun.
HR is utterly useless for intervals under maybe 3-5 minutes in length.