Many of my patients are frequent business travelers. Travel presents its own set of health challenges, from the risk of prolonged immobility in small airline seats, to the risk of acquiring respiratory infections on a plane. One painful consequence of travel that we've all experienced is jet lag. Especially when crossing several time zones, jet lag can make the first day or two at your destination very unproductive. In last Saturday's Los Angeles Times business section, James Gilden has a very ...