Here are smart tips for passengers from a flight attendant who has logged more air miles than any frequent flyer ever has. Cabin air is dry. Flying dehydrates your body. When the flight attendants roll the beverage cart down the aisle, order bottled water. Avoid coffee, alcohol or soft drinks.
Fruit juice is OK too.
In fact, bring your own bottled water in your carry-on bag. Put a water-soaked washcloth over your face when you sleep on long overseas flights. Get up, stretch and walk to the restroom, even if you don t need to use it, once an hour. Do isometric resistance exercises in your seat. Try not to cross your legs at the knees.