## 4 Discussion  
Previous research regarding the effects of cryostimulation on skin temperature of the body usually referred to whole body cryotherapy during the therapeutic treatment of various diseases. The aim of the study was to evaluate the effect of partial body cryostimulation in a multi-person cryocabin, performed immediately after a football match as a recovery technique, on the range of changes in skin temperatures of selected body areas within 24 regions of interests (12 anterior and 12 posterior). To our knowledge, this study is the first instance of research using a multi-person cabin in an open system. The main results of the research indicate that immediately after PBC, the skin temperature decreased significantly in all analyzed areas of the body. The temperature drop varied in area, ranging from 6.2 \({}^{\circ}\)C in the upper back to 11 \({}^{\circ}\)C on the front surface of the thighs. There are several reasons  
Figure 12: Lactate dehydrogenase concentrations before and after the match and in the course of post-exercise regeneration with the use of partial body cryostimulation. Figure 13: Aspartate transaminase concentrations before and after the match and in the course of post-exercise regeneration with the use of partial body cryostimulation. *** significant differences vs. ASTpre at \(p<0.001\). why monitoring body skin temperature seems to be a good diagnostic parameter during cryostimulation treatment: skin is recognized as the largest thermoregulatory organ; there is a relationship between skin temperature and vasoconstrticr skin sympathetic nerve activity and core temperature; the initial increase in metabolic response to cold exposure is driven by enhanced peripheral sensor activity as skin temperature declines; the rate of Tsk change affects thermogenesis, highlighting a significant dynamic influence of cutaneous thermoreceptors; Tsk is easier to access than intramuscular temperature; there are reports of correlations between these values [53; 54; 55]. The latest research in this area focuses on the importance of Transient Receptor Potential ion channels, especially TRPM8, TRPA1, and TRPC5, which have been found to be cold-sensitive ion channels. It has been proven that the TRPM8 channels are activated only when temperature is reduced to below \(-15\) and \(-30\)\({}^{\circ}\)C, which allows the entry of ions (Ca\({}^{2+}\), Na\({}^{+}\)) that depolarize the membrane and initiate its action potential, which would indicate their important role in the neurophysiology response to cryostimulation [56; 57]. Thus far, many studies have been conducted mainly on animal models, but it should be noted that Tsk decreases after PBC reaches a value of about 10 \({}^{\circ}\)C, which may be a factor significantly modifying the activity of harmful cold-sensitive TRP. Comparing the temperature distribution on the contralateral sides of the body in athletes, both before and after the PBC procedure, no temperature asymmetry greater than 0.5 \({}^{\circ}\)C was observed in any of the analyzed areas. Thermal symmetry has been defined as the degree of similarity between two regions of interest (ROIs) mirrored across the human body longitudinal axis, which are identical in size and position [58]. The first studies on thermal symmetry in humans showed that in healthy people, the difference in skin temperature between the left and right sides of the body is only 0.24 \(\pm\) 0.073 \({}^{\circ}\)C [59]. Subsequent results of [PERSON] et al. [58] determined precisely that the thermal lateral differentiation in healthy people is 0.4 \(\pm\) 0.3 \({}^{\circ}\)C when the entire body surface is considered and is 0.4 \(\pm\) 0.15 \({}^{\circ}\)C for its individual regions. It should be noted that for interpretation in accordance with the standards of thermovision research, a temperature difference in the corresponding areas of the right and left sides of the body of \(<\)0.5 \({}^{\circ}\)C indicates no thermal asymmetry.