Effects of Waon therapy on chronic fatigue syndrome: a pilot study.
Soejima, Yuji, Munemoto, Takao, Masuda, Akinori et al.·Internal medicine (Tokyo, Japan)·2015
Researchers tested a heat therapy called Waon therapy, which uses a far-infrared sauna at 60°C for 15 minutes followed by rest, on 10 people with ME/CFS. After four weeks of daily treatment, patients reported significantly less fatigue and improved mood and daily functioning, with no harmful side effects reported.