United's outstanding safety record may evoke images of well-trained flight attendants, topnotch pilots, and skilled mechanics, but it also reflects a concern for customers' health and comfort.

Flying may be the most effective means to get from Point A to Point B, but anyone who has ever taken a transoceanic flight can attest that the immobility associated with long journeys can be uncomfortable. Dr. Gary M. Kohn, corporate medical director for United, says there are many measures travelers can and should take-from drinking adequate fluids to performing in-seat exercises-to make trips more pleasant. Those measures also may reduce the risk of developing a serious condition known as deep vein thrombosis (DVT).

A rare condition, DVT has been associated with prolonged immobility, which can be the result of activities such as watching a movie, working in a job that requires you to remain seated for prolonged intervals, and many forms of extended travel. This condition can result in blood clots forming in the legs and then moving to vital organs of the body. While DVT may affect individuals with abnormal blood flow, blood vessels, or blood composition more frequently, all travelers should be aware of the importance of moving their lower limbs, says Dr. Kohn. If you're planning a long flight and are being treated for a medical condition, please see your doctor. United also suggests the following: Avoid crossing your legs for long periods, wear loose-fitting clothing, drink adequate fluids, periodically perform a few exercises (see link below), and get up and walk at least once every two hours.

"United always takes the extra step to provide customers and employees with added medical safety and service," says Dr. Kohn, who cites the airline's leadership in installing automatic external defibrillators and training flight attendants in their use, and its ground-based, 24/7 physician-on-call service, as well as ongoing ergonomic improvements in seating.

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