In all my research, dehydration seems to be the major culprit of muscle tightness during air travel. We tend to feel the most comfortable when the humidity is between 40-70%, yet in an aircraft cabin, it falls to about 20% - even less than the Sahara Desert! In these conditions our body goes into overdrive to make sure our essential organs remain hydrated. Connective tissue (fascia, membranes, muscles, etc) is one of the first of our organ systems to dehydrate, leading to discomfort, headaches and irritability. Movement and stretching, while helpful in the short term, don't seem to do the job on a long distance flight. In this article, discover tactics to keep your muscles loose before, during and after long flights.