Basic descriptive statistics (mean, SD and range of variation) were calculated for each of the four hormones, and the normality of distribution (asymmetry coefficient) was examined. The concentration of dehydroepiandrosterone (DHEA-S) was determined with a specific rabbit anti-DHEA-S polyclonal antibody. The concentrations of the analyzed hormones were assessed in the electro-chemiluminescence assay (ECLIA) in the Cobas 6000 system with the E601 module (Roche Diagnostics, Germany). Body temperature was measured with a non-contact laser thermometer (Stalgast , Poland) before blood sampling. After every 12-min session, the students recovered in a neutral room (temperature of 18°C and humidity 50%–55%) in a sitting position.
At least one study has found a dose-dependent response between male body mass index (BMI) and infertility. Hopefully, future studies will examine whether the small temperature changes in testes induced by tight bottoms are capable of influencing fertility. Studies have shown that when wearing tight underwear, testicular temperatures do increase.
Most men experience a surge in testosterone levels within the first hour or two after waking up, peaking around 8-10 am. Testosterone production in the body is regulated by several factors, including temperature. While it does feel unpleasant at first, a burst of cold water will end up improving your mode once you are done with it. Taking a cold shower has a similar effect as cold water helps to reduce inflammation and promote healing. While hot baths and steam rooms were present around the world, from the Roman baths to Scandinavia and Asia, the cold was also known as a way to boost the immune system and health. However, more research is needed to determine whether saunas have a bigger impact on men who already have impaired sperm production.
Research from 2020 that examined lifestyle factors in 1,311 participants found that regularly using a sauna was linked to lower sperm concentration. Even so, the study noted that the impact of saunas on fertility may be an important consideration. The effects include reduced sperm concentration and motility (movement), and a decreased number of standard-shaped sperm (known as morphology). But how much heat does it take to negatively impact your sperm, and do common activities that involve heat harm your fertility? Just start slow, listen to your body, and adjust accordingly. A 2016 study found that cold showers lowered the study participants’ absence from work by 29 percent. Both of these effects can help your body resist illness.
Prolonged exposure to high temperatures can lead to a temporary decrease in testosterone production. The question of whether hot baths affect testosterone levels is a subject of ongoing interest. Therefore, further research is needed to confirm the effects of repeated sauna-induced thermal stress on specific hormones and the relationships between different hormones (such as the T/C ratio). An increase in COR concentrations is considered a sensitive indicator of a stress reaction and intolerance of heat, which is most frequently reported in infrequent or first-time sauna users (Follenius et al., 1982). In the present study, a significant decrease in COR levels could suggest that users who regularly use the sauna (twice a week) are accustomed to extreme changes in temperature.
The article references a study conducted by sports scientists at Swansea University. The world of sports and fitness has seen a surge in the popularity of cold therapies, from ice baths to state-of-the-art cryotherapy chambers. The blunted testosterone response could affect muscle growth, repair, and overall athletic performance (Earp, J.E., 2019). But how does this practice impact our hormonal landscape, particularly testosterone? It reminds us that while immediate reactions may be evident, the body’s deeper, compensatory mechanisms are always at play, ensuring balance and homeostasis (Sakamoto, K., 1991). LH, produced by the pituitary gland, is crucial in signaling the testes to produce testosterone. Testosterone, a vital hormone affecting muscle mass, mood, bone density, and reproductive functions, comes into focus (Smith, A.A., 2018).
The participants confirmed that they did not take any medications or nutritional supplements, were in good health, and had no history of blood diseases or diseases affecting biochemical and biomechanical factors. The students who agreed to participate in the study (47 men) were notified by e-mail and a text message whether they met the inclusion criteria and were provided with the date of final recruitment. The prospective participants were informed about the purpose of the study during a meeting held 2 months before the experiment at the University of Warmia and Mazury (UWM) in Olsztyn, Poland. The study was conducted in 2020 on 30 male volunteers aged 19–26 years (22.67 ± 2.02). These changes are particularly pronounced in individuals who are not frequent sauna users (Pilch et al., 2003). The hormonal system strongly affects the thermoregulatory system, and a number of hormonal changes occur under thermal stress. Elevated blood pressure and sweating during sauna trigger a number of responses and activate mechanisms that are responsible for the maintenance of homeostasis.
A DHEA-S deficiency can be manifested by low energy and increased sensitivity to thermal pain (Yamamotová et al., 2012). The influence of thermal stress on changes in DHEA-S concentrations has not been studied to date. Cumming et al. (1983) reported similar PRL concentrations to those noted in this study. A greater decrease in serum COR was noted in men with higher baseline COR levels, whereas the decrease observed in men with lower baseline COR levels was significantly smaller. Nindl et al. (2001), Daly et al. (2005) and Brownlee et al. (2005) confirmed the presence of a relationship between COR and TES during sample recovery, which could suggest that a critical concentration of COR has to be achieved in order to substantially influence circulating TES levels.

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