>- Their is also the Skin effect. Zapping doesn't go through the entire body. Unless you use a carrier wave.
That is now known to be incorrect.
When zapping with pad type devices, using the 4 point contact method, with 3 points positive, electrodes can be placed internally and measurements taken that show the signal does penetrate the skin and carried through the entire body, being carried through the connective tissue. There are some individual differences such as some people who have excessive keratination of the skin.
>- And using frequencies isn't zapping it's more of a Crane Rife. Zapping is suppose to work because of the positive offset square wave.
This is a limited perspective of only one aspect of zapping. Zapping also needs some frequency in addition to the positive offset. A square wave is required as the sharp edges induce ringing even the the frequency is not an exact subharmonic.