[kiers77]

you mention: "Further the metabolic equivalent is what really does the correction"

The formula given above MPHR + 12 x METS -4 x age +(female factor) is correct.

however it doesn't seem to NORMALIZE for METs as you indicate. what you imply is more of a ratio: MPHR / METs. This is not the case, so this "FIT" treadmill test metric does not care how easily you reach your MPHR, UNLESS, it is all variables entered at the moment of MPHR.