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Researchers from the University of Eastern Finland tracked 2,300 middle-aged men for an average of 20 years. They categorized the men into three groups according to how often they used a sauna each week. The men spent an average of 14 minutes per visit baking in 175° F heat. Over the course of the study, 49% of men who went to a sauna once a week died, compared with 38% of those who went two to three times a week and just 31% of those who went four to seven times a week. Frequent visits to a sauna were also associated with lower death rates from cardiovascular disease and stroke.
The results don’t surprise Dr. Thomas H. Lee, a cardiologist at Harvard-affiliated Brigham and Women’s Hospital and founding editor of the Harvard Heart Letter. “The cardiovascular effects of sauna have been well documented in the past. It lowers blood pressure, and there is every reason to believe that its effects are good for blood vessels,” says Dr. Lee.
Earlier studies have shown that regular sauna bathing may benefit people with risk factors for heart disease, such as high cholesterol, high blood pressure, and diabetes. It’s generally safe and likely beneficial for people with mild heart failure, but may not be so hot for those with unstable angina or a recent heart attack.
In fact, Finns may spend even more time in the sauna than they do exercising. While most Finns visit a sauna at least once a week, only about half of Finnish men and a third of Finnish women between 18 and 65 meet the World Health Organization exercise guidelines, which recommend the equivalent of 30 minutes of moderate-intensity physical activity five days a week. The Finnish researchers suggest that saunas may provide some cardiovascular conditioning because the high temperatures can drive heart rates to levels often achieved by moderate-intensity physical exercise.
In individuals with higher exposure or body burden, sweat generally exceeded plasma or urine concentrations, and dermal could match or surpass urinary daily excretion. Arsenic dermal excretion was severalfold higher in arsenic-exposed individuals than in unexposed controls. Cadmium was more concentrated in sweat than in blood plasma. Sweat lead was associated with high-molecular-weight molecules, and in an interventional study, levels were higher with endurance compared with intensive exercise. Mercury levels normalized with repeated saunas in a case report. Sweating deserves consideration for toxic element detoxification. Research including appropriately sized trials is needed to establish safe, effective therapeutic protocols.
BPA was found to differing degrees in each of blood, urine, and sweat. In 16 of 20 participants, BPA was identified in sweat, even in some individuals with no BPA detected in their serum or urine samples. Conclusions. Biomonitoring of BPA through blood and/or urine testing may underestimate the total body burden of this potential toxicant. Sweat analysis should be considered as an additional method for monitoring bioaccumulation of BPA in humans. Induced sweating appears to be a potential method for elimination of BPA.
Results. Some parent phthalates as well as their metabolites were excreted into sweat. All patients had MEHP (mono(2-ethylhexyl) phthalate) in their blood, sweat, and urine samples, suggesting widespread phthalate exposure. In several individuals, DEHP (di (2-ethylhexl) phthalate) was found in sweat but not in serum, suggesting the possibility of phthalate retention and bioaccumulation. On average, MEHP concentration in sweat was more than twice as high as urine levels.
originally posted by: chrismarco
a reply to: ringdingdong
Who the heck has time to go to a sauna 7 days a week...perhaps they are living a much better lifestyle given that they have some much free time..I'm wondering what their socioeconomic status was....compared to the person going one day a week...
probably everyone with a house: www.google.com...
originally posted by: chrismarco
a reply to: ringdingdong
Who the heck has time to go to a sauna 7 days a week...perhaps they are living a much better lifestyle given that they have some much free time..I'm wondering what their socioeconomic status was....compared to the person going one day a week...
Heat shock proteins (HSP) are a group of proteins the expression of which is increased when the cells are exposed to elevated temperatures.
originally posted by: chrismarco
Who the heck has time to go to a sauna 7 days a week...perhaps they are living a much better lifestyle given that they have some much free time..I'm wondering what their socioeconomic status was....compared to the person going one day a week...