If you're looking for a healthy way to sweat out all of your body's toxins, you may want to avoid trips to the sauna. Researchers from the University of Padova in Italy asked 10 healthy Finnish men in their thirties to participate in 15-minute sauna sessions twice a week for three months. Each study participant reported normal sperm count prior to the sauna regimen and no history of sauna use in the past year. They were also asked to provide blood and semen samples and had their scrotal temperatures taken before and after each sauna session. The group's sperm count and concentration experienced a significant drop off after three months of 15-minute sauna sessions and remained low in the three months following the program. However, sperm production was restored to normal levels after six months.