The human body is not made to sit still for long periods of time. Proper physical function relies on movement and blood circulation. However on an extended flight, you may feel like you do not have a choice in the matter. You are stuffed into a cramped seat with little opportunity for movement. Hours in this position can lead to stiffness, cramping, and decreased blood flow. It is important to learn how to master the art of long flights without suffering the physical consequences.
To keep your lymph system working at peak levels despite your extended flight, try to engage in movement as much as possible. Keep the fluids flowing through your body by periodically walking down the plane aisle (if the fasten seatbelt light is off). You can perform stretches, even yoga positions, in this narrow space. In your seat itself you can do small exercises that will keep your blood flowing harmoniously through your body. Try pressing your palms together, exerting pressure on them so your arm muscles flex. You can lift your arms over your head. You can flex your abdominal muscles, straightening your back. You can tense your thigh muscles in repetitions. If you take a big book to read...