Susanne Gannon, a yoga instructor in the Charleston area, wrote a fantastic article for Charleston.net, suggesting some simple (and inconspicuous) yoga stretches that a traveler can do at the airport:
–Subtle Airport Yoga (the Not-Making-A-Fool-of-Yourself Version):
Calming Breath (for those of us who don’t like flying much): Either close your eyes or fix them on a nonmoving point in front of you, careful not to stare at any crazy drunks in the terminal. Breathing through your nose, inhale to a count of 2, and exhale to a count of 4. Do this 10 times. Then inhale for 3, exhale for 6. Concentrate on controlling your breathing. This will keep your heart rate down.
Gomukhasana arms: Extend your right fingertips to the ceiling. Rotate your shoulder and touch your right palm to the middle of your back, elbow pointing upward. Reach your left arm behind you and reach your fingertips up, clasping your hands together. Can’t reach? Most people can’t. Instead of trying to bind your hands together, use your left hand to clasp your right elbow and stretch the triceps and shoulder muscles. Do both sides.
Forward fold in terminal seat: Sitting in the terminal, extend your legs out in front of you. Keep your back flat and your belly long. Fold forward as though you are trying to zip yourself closed from the hips to the shoulders. This means NO COLLAPSING OR ROUNDING OF THE BACK. This stretches your hamstrings and calves, which tighten as you sit in flight.
You can read the entire article here.