This is good information for all plane travelers and would probably work for long drives too.. One of my young friends with no health problems just got a blood clot in her leg on a return flight from Hawaii. In an airplane, the dehydration caused by the dry air may thicken blood. In addition, the low cabin pressure, combined with immobility in cramped seats, may cause blood to collect in the legs. In addition, you can Walk around the cabin every 15 to 30 minutes if possible during flights of three hours or longer Do some simple stretching exercises while seated Sleep only for short periods?up to 30 minutes at a time Limit alcohol and caffeine, which may contribute to dehydration Bring your own water bottle, or request water if your flight has a beverage service Walk briskly through the airport during layovers In-flight exercises Ankle turns: Lift your feet off the floor and move your toes in a circle, one foot moving clockwise and the other foot moving counterclockwise. Change direction and repeat. Foot lifts: Place your heels on the floor and bring your toes up as high as you can. Then put both feet back flat on the floor. Then pull your heels up while keeping the balls of your feet on the floor. Knee lifts: While keeping your knee bent, raise your leg while tensing your thigh muscle. Repeat 20 to 30 times, alternating legs. Shoulder rolls: Raise your shoulders and then move them forward, downward and then backward in a smooth circular movement. Arm bends: Start with your elbows on the armrests and your hands pointed forward so that your lower and upper arms make a 90-degree angle. Take turns moving your left and then your right hand toward your chest and back, and continue for 30 seconds. Knee to chest: Bend slightly forward. Fold your hands together around your left knee and pull it toward your chest. Hold this position for 15 seconds and let your knee drop slowly. Change legs and repeat. Forward bends: Place both feet on the floor and pull your abdomen in. Bend slowly forward and ''walk'' your fingers along your shins to your ankles. Hold for 15 seconds and sit up slowly. Upper-body stretch: Stretch both arms over your head. With your right hand, grab your left wrist and pull it slowly to the right. Hold for 15 seconds and change arms. Shoulder stretch: With your right hand, grab your left elbow and pull your outstretched left arm slowly toward your right shoulder. Hold for 15 seconds and change arms. Neck roll: Relax your shoulders, let your head drop to your right shoulder and roll your head slowly to the front and then to your left side. Repeat five times. The full article is at http://www.acefitness.org/fitfacts/fitfact....cfm?itemid=290