[Clara Lou]

I would get up in flight, and do stretching exercises (to avoid blood clots, cramps, etc)
Give us --and your fellow passengers-- a break! (Hypochondria might be more of a concern for you.)

[testforecho]

(Hypochondria might be more of a concern for you.)

LOL. Maybe a little. But then again a little exercise never hurt anyone. : )

[supercat]

(Hypochondria might be more of a concern for you.)

Deep vein thrombosis is second most common natural cause of sudden death. My wife died of it in March of 1999. Don't dismiss it so lightly.