A study published in Age and Aging last 7 December,  found that the constant and regular use of the practice of sauna is associated with a reduced risk of dementia and Alzheimer disease (AD).
Further results of this study at the University of Eastern Finland, Kuopio, on ischemic heart disease (kihd), which included more than 2,300 middle-aged men, considered healthy at baseline, showed that those who practiced in sauna average from 4 to 7 times a week, they had 66% less likely to develop dementia at 20 years of follow-up than men who used a sauna once a week. Also, they had a reduction of 65% of the risk for AD.
The report provides promising results: the first prospective study shows us how the bathroom sauna is a protective lifestyle potential factor for diseases of the common memory.
The researchers examined previously the kihd study population to determine possible links between the sauna and cardiovascular events.
They found that men who have practiced saunas no more than two or three times a week showed significantly lower rates of sudden cardiac / fatal coronary heart disease death compared to those who have only practiced saunas once a week.

For the current analysis, the researchers examined a cohort of 2,315 participants who reported the practice of sauna. All the men were aged between 42 and the base 60 years (mean age, 53.1 years).
Traditional Finnish sauna have been used by all participants in the study. These versions have dry air, and a recommended temperature between 80 and 100 ° C. and the humidity is increased temporarily by spraying water on the hot rocks inside the stove.

The men were divided into 3 subgroups based on the weekly average of sauna use: once a week, 2 to 3 times a week, and 4 to 5 times a week. The mean follow-up time was 20.7 years.

The results show a strong inverse association between the frequency of the sauna and the risk of dementia and [AD].
Note that recent studies have suggested that inflammation and oxidative stress may contribute to the pathogenesis of dementia .: our results are thus biologically plausible, since the regular practice of the sauna is associated with an improvement in vascular endothelial function, which also carries to reduce inflammation. In addition, the sauna can be useful in the reduction of elevated systemic blood pressure, which is well-known risk factor for dementia.