Day of your flight: the airport workout
Sitting still for long periods of time, whether on your couch at home or on a plane, doesn't do your body any favors. While you can't do much about the length of your flight, you can offset the inevitable sitting by exercising before your flight. If you have enough time to hit the gym before you head to the airport, great. If not, here's your pre-flight airport workout:
Take a walk. Walk the airport concourse for 15 to 30 minutes before your flight starts boarding. Don't stroll -- book it and get your blood flowing. Pretend you are desperately late for a flight -- everyone will get out of your way!