Earthing was popular in the early 90's in the UK for ME and CFS. I had an engineer with an interest in this visit my house and install a device that he had invented. Also he rigged up what would have been maybe an early version of the earthing sheet for the bed. Sadly, this had no effect on my main ME symptoms or POTS. At that stage I didn't realise it was called POTS of course. My cortisol is very low in the mornings and increases during the day a little so a different chart to the one posted previously. Most of my ME symptoms are viral. POTs was dx'ed in the late 90's or just after the Rowe paper. In the mid/late -90's I was given another version of the mat for my bed but once again it had no effect that I could feel or see.