Academician Mikulin of the former Soviet Union once proposed using the method of "land contact" to resist aging. The reason is that the earth has a large number of negative charges. There is an ionosphere composed of positive ions around the earth. It forms an electric field between the Earth and the ionosphere, and all living things adapt to this environment. However, the modernization of life prevents human beings from directly contacting the earth and is free from negative charges. It will accumulate too many positive charges in our bodies and make people more susceptible to illness. To solve this problem, Mikurin has always insisted on fixing one end of a wire to the radiator and the other end to his feet. He not only lived to 90 years old, but also maintained his exuberant energy at an advanced age. How high is the body's static electricity? According to statistics, in the dry season, if you wear chemical fiber clothing and insulated shoes to walk on the insulated ground, the static electricity on the human body can reach thousands of volts or even tens of thousands of volts. For example: people walking on the carpet, under RH (10-20)% humidity conditions, up to 35kV, under RH (65-90)%% humidity conditions, there are also 1.5kV; pick up normal polyethylene from the worktable The bag can reach 20kV under RH (10-20)% humidity condition, and can reach 1.2kV under RH (65-90)%% humidity condition. Some experts believe that the generation of static electricity is not terrible, and terrible is the accumulation of static electricity. For thousands of years, our ancestors walked barefoot every day and touched the land. But later people put on shoes, which destroyed the balance of the body's electrical energy, so that the harm caused by static electricity to human health, wearing rubber shoes and chemical synthesis of shoes on the soles of the more harmful, it is because we are out of the earth. In dry areas and dry seasons, the release of charge is relatively difficult, so the accumulation of static electricity and the consequences of it will be very obvious. Some scholars have said that in order to prevent the harm of static electricity to human health, people should eliminate excess power by touching the ground.