01 Mar One step forward, towards transpiration
The human body is a thermal machine that transforms chemical energy ingested through food and drink into heat and work, through metabolism.
When you carry out physical activity, most of the energy is transformed into heat. About 80% of this heat is expelled through TRANSPIRATION (which is nothing more than the evaporation of sweat produced by the human body).
The two individual parameters that influence thermohygrometric well-being are:
– level of physical activity;
– type of clothing: fundamental parameter that influences the passage of heat and humidity.
The sweat that comes out of the skin, if it does not evaporate adequately, creates a film on the epidermis which blocks the pores and forces the body to make an additional effort to evaporate the drops of sweat: it can even lead to an additional cardiac effort of 8 beats/minute. A situation that quickly leads to the onset of the feeling of fatigue, with a consequent decrease in performance (in addition to all the associated risks).
A further problem due to internal and muscle overheating is the early onset of muscle cramps.
Finally, poor perspiration can lead to the onset of sweat dermatitis.
In order to guarantee adequate evaporation and therefore to have good thermo-hygrometric well-being, it is of fundamental importance not to limit oneself only to traditional technical-textile parameters (RET – resistance to water vapor transmission -; RCT – resistance to conductive heat transfer – ) in the development of technical clothing.
At BTECH, we have taken a further step forward and also studied a fundamental physiological parameter: the MET (Metabolic Equivalent of Task).
In practice, it is essential for us to study the heat produced per unit of time and body surface area. Only in this way are we able to propose solutions with a high level of performance, but above all designed based on the specific physical activities to be carried out. As the MET increases (each discipline has its own), the speed with which the internal body temperature rises increases.