Best in flight exercise?

what creative methods do you use for exercising on planes?

I've tried doing some yoga in flights (depends on the flight attendant if this is permitted)
I saw in another topic someone used blankets to play tug-of-war

I like this thread better when it was posted verbatim on the Lonely Planet forum here or on the FlyerTalk forums here.

I stay up all night and then sleep on the plane, exercising my rest cycle

Not much room nowadays on airplanes ? isn't it ?
EVen difficult to have a proper sleep, never mind the exercise.

Agree with you. There is decrease in available space and this gives no room for exercise.

Even in a constricted airplane cabin, it is possible to do some isometric stretches that help your blood circulation. I think it's particularly important if you're older, because that's when the blot clots occur.

I just repeatedly tense up the muscles in my legs or backside to keep the blood flowing while in my seat.

A few times I've even gone to the lavatory just to get out of my seat even though I didn't have to go.

I like to beat my chest and kick the seat in front of me. A hearty wail from time to time keeps the vocal cords loose.

When trying to exercise in a plane some airlines are definitely are better than others. I found this one a popular exercise site. Hopefully this will help a couple of you http://www.bodybuilding.com/fun/weis16.htm