The warm keeping of the body is very important to enhance the immune response and to maintain our health. It is said that a specific wavelength in the regime of far infrared rays plays a very important role for keeping our health due to the improvement of blood circulation. The characteristic of such wavelength is that its frequency is same as the resonance frequency of human body. So, experiments have been carried out to examine the effect of far infrared rays emitted from e-ion crystal materials composed of several kinds of polar crystal materials on human body through the temperature measurements of palm, leg and chest which are radiated by such infrared rays. Of course, e-ion crystal materials involve the resonance frequency with the same as human body and spectrum emissivity is about 0.94. The operation of e-ion crystal materials may be estimated as follows: when a specific wavelength emitting from e-ion crystal materials is discharged to the skin surface, the molecules such as H_2O which constitutes the skin surface violently vibrates accompanying with the resonance frequency and these vibration energies penetrates into the successive inner skin layers. This mechanism increases the internal energy of the blood and consequently, improves the blood circulation. These facts promote the perspiration from human body and also increase the sensory temperature. So, one can understand that such a radiant heat transfer mechanism is very different from that of thermal heat transfer based on temperature difference and temperature boundary layer.
The Proceedings of Joint Symposium: Symposium on Sports Engineering, Symposium on Human Dynamics
