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Evidence-Based Complementary and Alternative Medicine
Volume 2018, Article ID 1857413, 30 pages
https://doi.org/10.1155/2018/1857413
Review Article

Clinical Effects of Regular Dry Sauna Bathing: A Systematic Review

School of Health and Biomedical Sciences, RMIT University, Melbourne, VIC, Australia

Correspondence should be addressed to Joy Hussain; moc.liamg@9niassuhyoj

Received 9 October 2017; Revised 14 December 2017; Accepted 8 January 2018; Published 24 April 2018

Academic Editor: Kieran Cooley

Copyright © 2018 Joy Hussain and Marc Cohen. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Introduction. Many health benefits are claimed by individuals and facilities promoting sauna bathing; however the medical evidence to support these claims is not well established. This paper aims to systematically review recent research on the effects of repeated dry sauna interventions on human health. Methods. A systematic search was made of medical databases for studies reporting on the health effects of regular dry sauna bathing on humans from 2000 onwards. Risk of bias was assessed according to the Cochrane Collaboration guidelines. Results. Forty clinical studies involving a total of 3855 participants met the inclusion criteria. Only 13 studies were randomized controlled trials and most studies were small . Reported outcome measures were heterogeneous with most studies reporting beneficial health effects. Only one small study reported an adverse health outcome of disrupted male spermatogenesis, demonstrated to be reversible when ceasing sauna activity. Conclusions. Regular dry sauna bathing has potential health benefits. More data of higher quality is needed on the frequency and extent of adverse side effects. Further study is also needed to determine the optimal frequency and duration of distinct types of sauna bathing for targeted health effects and the specific clinical populations who are most likely to benefit.