I believe in the concept that if you take the residual voltage off your body, you reset the secretions of your adrenal gland to sync with a circadian cycle.
I've experienced it with my mother, so I have to relate my experience.
I learned how to run barefoot 15 years ago, and as a result I heard alot about the benefits of being grounded. So I bought a "grounded bedsheet kit" from a Dr. Mercado that came with a plug that goes into your receptacle and uses the ground of the third prong, and/or an 18" ground rod for homes without a 3-wire system. There's also a fuse in between the connection to prevent any lightning from striking an individual.
My mom was 86 at the time, and always complained about arthritic pains that would prevent her from getting out of bed in the morning. So I put the kit on her bed, and within three nights she said her arthritic pains were gone. Six weeks later they returned, because the lady who changed the bedsheet didn't reconnect the cable. The bedsheet is conductive and comes in contact with the feet. Six months later her pains came back. She checked the clip and it was on, so she followed the wire out the window to the 18" ground rod and saw where the lawnmower hit the connection and knocked it off the ground rod. I fixed it, and she was good. She lived another 5 years and always had the grounded bedsheet.
I saw it so I gotta say it!
I've also proved out that there is a residual voltage on your body when you climb in bed, using a voltmeter. And I've proven that using my wristband takes 2-3 minutes to completely rid my body of any voltage induced on it.