This would be the Pete Cisco/John Little thing, right?
Total crap from two guys who's lack of understanding concerning physiology shows in a glaring way in what they write. This is just sort of a logical, yet ridiculous extention of the Power Factor notion that displays an ignorance of physics.
Most of this was offshoots of Mentzer's later work, also misguided, as was SupreSlow and on and on.
The only guy I've seen solve the intensity/frequency problem is DC.