Breathing thin air, such as that found at high mountain summits, is usually taxing on the body. However, a study conducted at São Paulo State University (UNESP) in Brazil showed that short, controlled exposure to low-oxygen air is safe and does not interfere with sleep. This exposure can also modulate hormones and markers associated with inflammation in people with Parkinson's disease. These preliminary results pave the way for further research into using this technique as a complementary therapy for the condition.