Review article on Earthing: http://deltabed.no/wp-co.../10/jording_og_helse.pdf

Quoting from the conclusion:

De Flora et al. wrote the following: “Since the late 20th century, chronic degenerative diseases have overcome infectious disease as the major causes of death in the 21st century, so an increase in human longevity will depend on finding an intervention that inhibits the development of these diseases and slows their progress”​

​Could such an intervention be located right beneath our feet? Earthing research, observations, and related theories raise an intriguing possibility about the Earth’s surface electrons as an untapped health resource—the Earth as a “global treatment table.” Emerging evidence shows that contact with the Earth—whether being outside barefoot or indoors connected to grounded conductive systems—may be a simple, natural, and yet profoundly effective environmental strategy against chronic stress, ANS dysfunction, inflammation, pain, poor sleep, disturbed HRV, hypercoagulable blood, and many common health disorders, including cardiovascular disease. The research done to date supports the concept that grounding or earthing the human body may be an essential element in the health equation along with sunshine, clean air and water, nutritious food, and physical activity.

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I can personally feel a massive difference after grounding my body to the Earth's electric field. In Eastern traditions, there is known to be Earth Qi and Heavenly Qi.

Walking barefoot on the Earth feels good. That's enough evidence for most people. For me, anyways. Then again, a lot of activities can feel good. This paper is quite intriguing, however. Pointing out the observable and balanced improvements feels good, too.