In ancient times, our ancestors wore wooden khadau (sandal) in the feet.

The thought of our ancestors was completely scientific even after wearing wooden stands on the feet.

The science of electrical waves which was later found by scientists was understood long before by our sages, earth absorbs electrical waves of body due to low potential that's why they started wearing wooden Khadau

cause Wood is a good resistant which prevents electrical waves of body to get absorbed by Earth.

According to the theory, the electric waves flowing in the body are absorbed by the Earth due to low potential of the earth.

If this process continues , then the biological force of the body decreases.
In order to save this biological power,

our ancestors started the practice of wearing the Khadau in the feet so that the electrical waves of the body could not be in contact with the Earth and get absorbed.