Skin temperature rhythmic fluctuations of students engaged in aerobics as an endogenous factor of adaptation to external environment

Abstract

The paper aims to study the effect of moderate cooling on maintaining temperature rhythmic fluctuations of the skin surface in students engaged in aerobics. Measurements were performed before and after warming up at an ambient temperature of 20-21°C. Students were characterized by a different fat status. Materials and methods: 30 female students were examined using Tanita BC-418 MA analyzer (Japan) to determine the percentage of adipose tissue (AT) and body water. Six students with adipose tissue in the range from 7.4% to 24.8% were selected. The signal was recorded twice for 10 minutes from the front surface of the body with a BALTECH TR- 01500 thermal imager (Germany). Results: according to the data in the form of average values of skin temperature (above the region of the quadriceps of the left leg), graphs of changes were built in Microsoft Excel. The analysis of temperature fluctuations confirmed the hypothesis that each individual has his/her own temperature biorhythm. Conclusion: in spite of the warm-up period that disrupts the performance of the thermoregulatory system, the temperature fluctuations returned to the initial biorhythm triggered by moderate cooling. This may indicate that maintaining thermal balance allowed the thermoregulation system to effectively control temperature homeostasis due to the natural, genetically determined temperature biorhythm.