12/05/2023
๐๐๐ฎ๐ง๐ ๐๐ข๐ฌ๐ญ๐จ๐ซ๐ฒ ๐๐ง๐ ๐๐ฆ๐ฉ๐ฅ๐ข๐๐๐ญ๐ข๐จ๐ง๐ฌ ๐๐จ๐ซ ๐๐จ๐ง-๐๐จ๐ฆ๐ฆ๐ฎ๐ง๐ข๐๐๐๐ฅ๐ ๐๐ข๐ฌ๐๐๐ฌ๐
Sauna originated approximately 4,000 years ago in northern Europe, predating contemporary organized religion. The first saunas were caves heated by fire and draped with animal skin. Primordial man used the thermal capacity of stone to prolong the heat source through a cold night. During winter, these hot rooms were one of the only habitable places. Still, saunas have been used for more than simply keeping warm โ they are bathhouses, sanctuaries, and places of worship. In Finland, nearly everyone takes a sauna at least once a week to cleanse the physical and mental bodies. Despite esoteric jargon, there are measurable physiologic benefits of hyperthermic therapy that will become invaluable in treatment of modern non-communicable diseases.
Thermoregulation and immunity are inherently inseparable phenomena. As body temperature rises, our nervous system stimulates dilation of blood vessels, encouraging movement of white blood cells. During infection, body temperature rises because white blood cells function best over 100 degrees Fahrenheit. Fever alters surface proteins on Lymphocytes to facilitate mobility through blood vessels, known as lymphocyte trafficking. I cannot understate the importance of vessel compliance and blood flow efficiency. Heat promotes movement in tissue throughout the body entirely including lymph, cerebrospinal fluid, the gastrointestinal tract, and, the vital organs. Our liver is constantly working to remove unwanted substances from blood by increasing their polarity, and therefore how readily they will travel with water. This process is done primarily through hydrolysis and conjugation, increasing polarity and solubility in water.
Sauna bathing is consistently studied in Finland as an enriching habit for heart and cardiovascular function. Laukkanen et al. literally investigated the association of sauna frequency with risk of sudden cardiac death (SCD), fatal coronary heart disease (CHD), fatal cardiovascular disease (CVD), and all-cause mortality. 2315 middle-aged (42-60 years) men from Eastern Finland were followed for an average of 20 years. They found sauna frequency is inversely associated with cardiovascular disease and all-cause mortality. Sauna improves detoxification of several persistent organic pollutants and heavy metals (mercury, arsenic, lead, cadmium) linked to cardiovascular disease, diabetes, and obesity. Furthermore, strong evidence suggests sauna bathing can significantly improve the effect certain chemotherapies and antidepressant medication.
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Sears ME, Kerr KJ, Bray RI. Arsenic, cadmium, lead, and mercury in sweat: a systematic review. J Environ Public Health. 2012;2012:184745. doi:10.1155/2012/184745
Laukkanen, T., Kunutsor, S.K., Khan, H. et al. Sauna bathing is associated with reduced cardiovascular mortality and improves risk prediction in men and women: a prospective cohort study. BMC Med 16, 219 (2018). https://doi.org/10.1186/s12916-018-1198-0
Laukkanen T, Khan H, Zaccardi F, Laukkanen JA. Association between sauna bathing and fatal cardiovascular and all-cause mortality events. JAMA Intern Med. 2015 Apr;175(4):542-8. doi: 10.1001/jamainternmed.2014.8187. PMID: 25705824.
Rentscher, Kelly; Janssen, Clemens W.; Lowry, Christopher A.; Mehl, Matthias R.; Allen, John J. B.; Kelly, Kimberly L., et al. (2016). Whole-Body Hyperthermia For The Treatment Of Major Depressive Disorder JAMA Psychiatry 73, 8.
Background Previous evidence indicates that sauna bathing is related to a reduced risk of fatal cardiovascular disease (CVD) events in men. The aim of this study was to investigate the relationship between sauna habits and CVD mortality in men and women, and whether adding information on sauna habit...