I’ll answer each question separately.
1 - PEMF increase cell voltage? Short answer: Maybe indirectly by improving cell function. My impression is that the discussions of “cell voltage” are based on a lot of fraudulent and pseudo-scientific claims made by electro-medicine charlatans. The physiology is way more nuanced than any statements such as “more voltage = more health”, and cells do not really act like batteries in the way frequently described in this context.
This is all very, very complex, but briefly: a living cell has active transport mechanisms and complex, multi-layered mechanisms to regulate trans-membrane potential. Too much trans-membrane potential can be as damaging as not enough. A sick cell may have inhibited trans-membrane potential, and if “something” fixes that basic problem, then that same “something” would indirectly also be increasing the trans-membrane potential back to normal levels. This is what I mean by “maybe, indirectly”. If PEMF corrects some problem, then normal electro-physiology may also be restored as a consequence.
But in my technical opinion, PEMF does not “charge” cells like a battery as people sometimes claim. All that is required is that PEMF restore normal function, and the rest takes care of itself.
2- Phase angle scores improved by PEMF? Short answer: I speculate probably YES, but no one has specifically told me they have seen this effect. I use a very precise technical definition of “phase angle” that is the same as used by electrical engineers and physicists. I think some people may be using this term incorrectly, but applied correctly I believe it refers to bioelectrical impedance, in which the phase angle results from a change in the electrical reactance (also a well-defined electrical physics term), which is measured by applying a sine wave across the tissue, and measuring the resulting phase shift in the sine wave. I am not an expert on this topic, but evidently the phase shift is influenced by several biological factors related to gender and age and ill-health (mostly hydration as I understand it), so it is a real quantity that can be measured. Once again, I am not an expert, but I would speculate that, if PEMF somehow restores a state of normal function to cells and tissues, that these “biological factors” that cause phase angle changes normally attributed to age and ill-health may be corrected, and thus the resulting phase angle may be improved.
The effect may be indirect, for example: PEMF may do something to correct a problem. We do not know much about the direct mechanisms of PEMF, so for the moment let’s assume this is unknown. But let’s further assume it results in improved function at the cellular level. This in turn may improve the ability of tissues to be hydrated. This may simply be because of a change in the state of inflammation, or some other mechanism. Improved hydration leads to a change on phase angle. So, the effect of PEMF on phase angle would be indirect, but important.
Like I say, I am not an expert on bioelectrical impedance analysis, but this is interesting enough to me that I will look into it more. It may be an important biomarker of the effects of PEMF on living systems. Thanks.